Innovations in Multifamily Building Energy Savings
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Experts explain new multifamily auditing techniques, their scalability, what makes the energy savings cost-effective, where the programs can be most successful, and what non-energy benefits result from this work.
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Innovations in Multifamily Building Energy Savings
- 1. Innovations in Multifamily Building Energy Savings New research & program approaches from the Midwest WEBINAR | CEE & Elevate Energy October 7th , 2015
- 2. Pg. 2Research Financing Policy Programs We promote energy efficiency to strengthen the economy while improving the environment.
- 3. Pg. 3
- 4. Pg. 4
- 5. Pg. 5 Wednesday, November 18th 11:00 am – 12:00 pm Russ Landry | CEE Senior Mechanical Engineer REGISTER HERE mncee.org/webinars Upcoming Webinar… Research Results: Low-Cost Condensing Boiler Optimization in Commercial Buildings
- 6. Pg. 6
- 7. Pg. 7 Innovations in Multifamily Building Energy Savings Moderated by CEE: Megan Hoye | Engagement Coordinator TODAY’S EXPERT PRESENTERS Corrie Bastian CEE Dale Hoffman Elevate Energy Timothy Crowder Elevate Energy
- 8. ©2015 Elevate Energy Innovative Testing Techniques for HVAC Working title
- 9. ©2015 Elevate Energy Our Mission We promote smarter energy use for all. We give people the resources they need to make informed energy choices.
- 10. ©2015 Elevate Energy Our Mission We promote smarter energy use for all. We give people the resources they need to make informed energy choices. We design and implement efficiency programs that lower costs, and protect the environment.
- 11. ©2015 Elevate Energy Our Mission We promote smarter energy use for all. We ensure the benefits of energy efficiency reach those who need them most. We give people the resources they need to make informed energy choices. We design and implement efficiency programs that lower costs, and protect the environment.
- 12. ©2015 Elevate Energy The Elevate Energy Team
- 13. ©2015 Elevate Energy Origins of System-Adjusted Verified Efficiency System-Adjusted Verified Efficiency (SAVE) program started initial testing 4 years ago with trainers from Energy Stewards International (ESI) Program currently offered by the Midwest Energy Efficiency Alliance (MEEA) and includes training, software tools, and other resources for HVAC professionals Staff and contractor partners attended training and are adopting methods to existing programs
- 14. ©2015 Elevate Energy Agenda What is furnace system efficiency testing? HVAC Performance Why test for system efficiency? Closer look at static pressure Benefits to stakeholder groups Implementation The trend: who is adopting this new approach
- 15. ©2015 Elevate Energy HVAC Performance What is HVAC Performance?
- 16. ©2015 Elevate Energy How AFUE Can Be Misleading Photo courtesy of http://www.mcintyrebuilders.com/Portals/0/Ruud%20Furnace.gif Photo courtesy of https://encrypted-tbn0.gstatic.com/images? q=tbn:ANd9GcQFtQ0zwBw5IxVlQPFqPlUT5DSfkhPwbJBp91pyjoMRB CvEkyxQKg
- 17. ©2015 Elevate Energy Components of HVAC Performance All are interrelated and must be considered in assessments and design of HVAC systems
- 18. ©2015 Elevate Energy Identifying the Issue HVAC SAVE Program Gas Program Data April 2015 A passing SAVE score is 85
- 19. ©2015 Elevate Energy Static Pressure Testing Procedure created by: Callum H. https://3dwarehouse.sketchup.com
- 20. ©2015 Elevate Energy Typical Adjustments Adjusting fan speed setting Repairs and sealing/insulating duct work Optimizing airflow Adding returns or supplies Combustion tuning Correcting filter type
- 21. ©2015 Elevate Energy Expected Savings from HVAC SAVE Measure Total Cost Cost with Incentive Gross Annual Therm Savings Gross Annual kWh Savings Energy Cost Saving Simple Payback Furnace Replacement $2800 $1900 230 700 $261 7.3 years Duct Modification $2000 $750 155 485 $177 4.2 years Combustion Tune-up $180 0 50 100 $51 Instant Air Balancing $325 $325 25 135 $35 9.3 years • These savings are per forced air unit • Current incentives are subtracted from the total cost • Data collected in Iowa, the costs are averages from measures completed from a sampling of homes *Energy cost savings are based on $0.80 per therm gas and $0.11 kWh electric
- 22. ©2015 Elevate Energy Benefits to Stakeholder Groups photo courtesy of https://www.ibm.com/developerworks/community/blogs/invisible thread/entry/five_benefits_of_agile_practices?lang=en
- 23. ©2015 Elevate Energy Benefits of System Verification
- 24. ©2015 Elevate Energy Benefits to Implementers
- 25. ©2015 Elevate Energy Benefits to Utilities
- 26. ©2015 Elevate Energy Benefits to Contractors
- 27. ©2015 Elevate Energy Benefits to Consumers
- 28. ©2015 Elevate Energy Implementation Photo courtesy of https://infomatrix.com/images/stories/emr_implementation.jpg
- 29. ©2015 Elevate Energy Implementation of Performance Verification http://sunrayheatinginc.net/Furnace_or_Boiler_Tune- up_Checklist
- 30. ©2015 Elevate Energy Key To Success http://sunrayheatinginc.net/Furnace_or_Boiler_Tune- up_Checklist Implementer Develop a comprehensive scope Evaluate system for opportunities Confirm the system efficiency Proved savings though EM&V Construction manager Contractors Utility High quality customer service through a single point of contact Strong construction management with 100% QA of jobs Robust data to support energy savings and monitor post- retrofit results Energy analyst
- 31. ©2015 Elevate Energy How We Are Using it Now As part of our assessment process Verifying current system operations Notified of premature equipment failures New equipment being installed
- 32. ©2015 Elevate Energy Growth and Trends Photo courtesy of http://www.startupist.com/2015/05/13/15- awesome-quotes-to-inspire-business-growth/
- 33. ©2015 Elevate Energy Growth in HVAC SAVE Program More than 2,200 contractors certified More than 30,000 HVAC SAVE quality installations or performance tune-ups since 2010 In 2014, 22,00 projects were processed though SAVE HVAC software
- 34. ©2015 Elevate Energy MidAmerica Energy SAVE Rebates
- 35. ©2015 Elevate Energy Other Utilities Adopting SAVE Standard Photo courtesy of http://hvacsave.com/save-sponsors
- 36. ©2015 Elevate Energy Take Action: What You Can Do Initiate conversation between utilities, implementers and contractors in your areas Conduct/attend trainings Links provided at the end to get you stared Reach out to program designers for advice MEEA Quality Installation Energy Star Contact us Dale.Hoffman@elevateenergy.org Timothy.Crowder@elevateenergy.org
- 37. ©2015 Elevate Energy Additional Resources/References http://hvacsave.com/ Improving Gas Furnace Performance: A Field and Laboratory Study at End of Life: http://www.nrel.gov/docs/fy15osti/63702.pdf Energy Savings From System Efficiency Improvements in Iowa’s HVAC SAVE Program: http://www.gastechnology.org/Solutions/Documents/BAPARR-Reports/Ener
- 38. Reducing the Cost of Effective Ventilation in Multifamily Buildings Research Findings Ready for Field Implementation Corrie Bastian | Multifamily Program Coordinator Center for Energy and Environment October 7th , 2015
- 39. Pg. 39 Acknowledgements This project was supported in part by a grant from the Minnesota Department of Commerce, Division of Energy Resources through a Conservation Applied Research and Development (CARD) program.
- 40. Pg. 40 Agenda • What are central ventilation systems? • Solving ventilation system issues • Case studies • Taking findings to the field
- 41. Pg. 41 Central Ventilation System Background
- 42. Pg. 42 Central Ventilation Systems: 2 basic types Central apartment exhaust Central corridor supply / make up air systems
- 43. Pg. 43 Impact of central ventilation systems • Responsible for 10-20% of building energy use • Typically run continuously, 24/7 • Manage indoor moisture, odors, and pollutants $$$
- 44. Pg. 44 Central ventilation: What are the issues? • Excessive ventilation flow rates • Increased electric use of motors • Cost of ventilating excessive heated or cooled air • Draftiness and noise • Lack of effective airflow distribution • Inlets clogging over time • Balancing dampers tampered with • Odors, moisture problems • Difficulty measuring airflows
- 45. Pg. 45 Where will you encounter central ventilation? Similar distribution to 80-99 category?
- 46. Pg. 46 Project Background • 18 buildings studied • 6 retrofits completed • Multifamily Ventilation Assessment and Retrofit Guide Available now (free download): www.mncee.org/MultifamilyVentilation • Final report will be published this fall Reducing the Energy Cost of Effective Ventilation in Multifamily Buildings
- 47. Pg. 47 Trash Chutes: Affect Ventilation Performance
- 48. Pg. 48 Cost-Effective Energy Savings Opportunities • 7 of 11 with trash chutes (64%) • Gas savings ranged $0.60 to $12 / unit / year • 3 of 16 with corridor supply/make up air systems (19%) • Gas and electric savings ranged $24-38 / unit / year • 6 of 12 exhaust systems (50%) • Gas and electric savings ranged $27-188 / unit / year Noteworthy:
- 49. Pg. 49 Solving Central Ventilation Issues
- 50. Pg. 50 Addressing Trash Chutes • Keep trash room doors closed • Seal trash room off from rest of building • If no door, seal chute to compactor/trash bin • Reduce chute cap opening
- 51. Pg. 51 Corridor Supply Air / Make-Up Air Systems SOLUTION •Reduce fan speed •Control adjustment or re- sheave of fan •Pre and post airflow test
- 52. Pg. 52 Corridor Supply Retrofit | Minneapolis BEFORE: •Delivering 70% more than recommended ventilation level Case Study ACTIONS TAKEN: •Clean screen & coil •Re-sheave unit for reduced flow • 2 month payback
- 53. Pg. 53 Annual Savings Details Whole Building Savings (annual) Ventilation Flow reduction 4,695 cfm Natural Gas Savings (NG) 9,611 therms Electric Savings 7,244 kWh Cost Savings* $6,899 Payback 2 mos. Per Unit Savings (annual) (193 units) Natural Gas Savings (NG) 31 therms Electric Savings 36 kWh Cost Savings* $30/unit *Based upon $0.65/therm and $0.09/kWh
- 54. Speed control dial for reduced speed Central Exhaust Systems
- 55. Speed control dial for reduced speed Old fan New fan Air seal at curb below fan • High efficiency motors w/ speed controls • Control allows for turndown level Central Exhaust Solution | Part I
- 56. Pg. 56 1 Remove balancing devices prone to clogging or tampering Dirty CAR Balancing louver 2 Seal duct leakage at inlet 3 Install fixed orifice sized for correct flow Central Exhaust Solution | Part II • Fix balancing orifices inlet flow at low cost
- 57. Pg. 57 Central Exhaust Retrofit | Minneapolis BEFORE: •Exhaust ventilation airflow 48% higher than recommended rate •Reported odor & moisture issues ACTIONS TAKEN: 1.Replace operable balancing louvers with fixed orifices 2.Replace rooftop belt drive exhaust fans with high-efficiency type 3.Verify airflow Case Study
- 58. Pg. 58 FINDING: Kitchen Shaft Savings Dominated x05 4 63 56 147 161 171 30 50 26 15 100 190 NA 84 67% 67% 17% 17% 17% Very High > 45 High > 36 Good +/- 20% Low < 24 Very Low < 15 Pre-Retrofit : Post-Retrofit : x05 4 34 32 34 31 30 33 34 34 31 35 35 34 30 NA 33 0 0 100% 0% 0%
- 59. Pg. 59 FINDING: Improved Distribution in Baths Shaft RTV# Floor 14 13 12 11 10 9 8 7 6 5 4 3 2 1 Avg Very High > 37.5 High > 30 Good +/- 20% Low < 20 Very Low < 12.5 x05 3 3 Full Half 0 28 29 23 34 25 24 26 21 21 24 23 23 28 26 26 22 23 22 26 22 22 21 22 21 25 11 NA Avg 21 24 0% 0% 7% 0% 79% 100% 0% 0% 14% 0% Pre-Retrofit: Post-Retrofit:x05 3 3 Full Half 5 19 41 5 43 5 18 41 32 46 29 26 26 20 5 27 35 5 20 25 33 11 NA 22 25 17% 20% 25% 40% 33% 30% 42% 30% 33% 20%
- 60. Annual Savings Details Whole Building Savings (annual) CFM Savings 2,299 cfm Natural Gas Savings (NG) 4,706 therms Fan Power Savings 21,979 kWh Cooling Savings 5,539 kWh Energy Cost savings* $5,535 Payback 6.2 yrs Per Unit Savings (annual) Natural Gas savings (NG) 58 therms Electric savings 339 kWh Energy Cost savings* $67/unit *Based upon $0.65/therm and $0.09/kWh
- 61. Pg. 61 Taking Findings to the Field
- 62. Pg. 62 Measuring Airflow TrueFlow capture boxCapture box made with duct blasters • Reduce equipment & labor • Increase accuracy with TrueFlow capture box
- 63. Multifamily Ventilation Assessment & Retrofit Guide Decision trees Look-up tables
- 64. Pg. 64 Basic Process for Candidate Building http://sunrayheatinginc.net/Furnace_or_Boiler_Tune- up_Checklist
- 65. Pg. 65 Echoing Elevate’s “Key to Success” http://sunrayheatinginc.net/Furnace_or_Boiler_Tune- up_Checklist Implementer (CEE) Develop a comprehensive scope Evaluate system for opportunities Confirm the system efficiency Proved savings though EM&V Construction manager Contractors Utility • Single point of contact improves customer service • Strong QA, 100% of jobs • Addressing distribution problems in addition to energy problems improves project salability Energy analyst
- 66. Pg. 66 Learn How to Find & Address These Issues UPCOMING TRAINING SESSION : This winter (date TBD) • FREE • TOPICS: • Utilizing the Ventilation Assessment and Retrofit Guide • Airflow Measurement • Calculating Energy Savings • Writing work scopes • Retrofit commissioning and verification - - Contact Corrie to Sign-up cbastian@mncee.org - -
- 67. Corrie Bastian | CEE cbastian@mncee.org Dale Hoffman | Elevate Energy dale.hoffman@elevateenergy.org Tim Crowder | Elevate Energy timothy.crowder@elevateenergy.org
- 68. Pg. 68 Innovations in Multifamily Building Energy Savings TODAY’S EXPERT PRESENTERS Corrie Bastian CEE Dale Hoffman Elevate Energy Timothy Crowder Elevate Energy
- 69. Pg. 69 New Construction Central Ventilation Systems CEE | Research & Program WHICH types of buildings…
- 70. Pg. 70 U.S. Multifamily Building Stock *2009 RECS Survey, EIA Data
- 71. Pg. 71 Minneapolis: Multifamily Buildings (20+ Units) % of All Building Stock
- 72. Pg. 72 Units Built Before 1960 Units Built Since 1960 Strong Potential Number of MF Units By Zip Code Seattle Seattle
- 73. Pg. 73 Minnesota: Multifamily Buildings (20+ Units) Population Density (2000 Census)
- 74. Audience Q&A Webinar Archive Link: http://www.mncee.org/Innovation-Exchange/Resource-Center/
- 75. Pg. 75
Editor's Notes
- CEE is a 35 year old clean energy non-profit in Minnesota, with a special expertise in energy efficiency Our mission is to discover and deploy the most effective solutions for a healthy, low-carbon economy. We have about 80 staff that work on in one of four integrated areas of expertise: technical research energy efficiency program delivery low-cost financing for building retrofits and efficiency installations
- CEE and Elevate started collaborating on this webinar thanks to our participation in the Relay Network, which is a group of peer organizations collaborating in the multifamily energy efficiency space. Relay organizations share knowledge and best practices to improve consistency and quality, providing national resources to local experts.
- CORRIE: 6 years in residential building efficiency BPI certified Building Analyst IECC Commercial Energy Inspector 10+ years in residential construction B.S. Natural Resources and Environmental Studies, UMTC DALE: 25 years of construction experience BPI, RESNET, LEED, NAHB NCI Residential HVAC Systems Performance MEEA HVAC SAVE TIMOTHY: 8 years technical research experience BPI Building Analyst and Envelope Professional NCI Residential HVAC Systems Performance
- In many places, energy efficiency programs have been around for so long that we are seeing high efficiency equipment being replaced. Some utilities and states have already increased their equipment baselines. For example, the furnace baseline in Iowa is 90%. Also, equipment standards continue to rise, and it’s forecasted they will rise even further. Programs are facing stiffer energy efficiency goals, and on limited budgets. One solution is to dig deeper into heavier marketing and outreach to get your programs in front of consumers and businesses that had not previously been on the radar. Unfortunately, these strategies can be intensive and expensive. We are also hearing more and more about behavioral programs, new technologies such as digital controls and energy management systems, and innovative program designs such as moving upstream. While some of these emerging program designs show promise, the risk of success is high and the return on ratepayer dollars is difficult to measure. Finally, we are also seeing performance based programs that compare the real before and after impact of specific energy efficiency measures. Measured impact does not allow for conservative estimates or for an evaluator to discount your impact. Performance programs also account for both improvements in hardware and also improved installation and maintenance processes. Two of the more popular performance programs are commissioning and retro-commissioning of larger buildings and Home Performance such as HPwES and EnergyStar New Homes. Today we are going to talk about another performance program, HVAC Performance.
- Elevate Energy is a nonprofit organization with a triple-bottom line mission. Economic: to save money for households, building owners, and communities. Environmental: using energy efficient technologies and conservation to protect the environment. Equity: to make sure the benefits of energy use are available to everyone, especially those communities who are often underserved.
- Our team is composed of a diverse array of professionals…with experience ranging from technical focus on construction and energy efficiency, to policy on housing and utility regulation. I hope will visit our website to learn more about us.
- Dale Midwest Energy Efficiency Alliance and Energy Stewards Intl have offered HVAC System Adjusted Verified Efficiency, or SAVE training for over 4 years now. Last year, 13 member of Elevate Energy’s staff and 12 of our contractors participated, to enhance our understanding of furnace efficiency, and develop the work force we needed to fulfill the task at hand, which is measuring and verifying efficiency rather than assuming the AFUE is indicative of system performance. We are wasting billions of BTUs because our workforce is under-trained or others that are inclined to install to code minimums. -To address this challenge, (MEEA), in partnership with (ESI), developed a program that allows HVAC contractors to easily diagnose and improve the performance of a furnace. This training program and contractor certification is named HVAC SAVE: System Adjustment and Verified Efficiency. I first met Tim Hanes, of ESI about 10 years ago when I took an HVAC class in Iowa and I have worked with him several times since. Much of his class is common sense when you really think about it, but it is also supported with a lot of data. I think Tim agrees when I say, “prescription without diagnosis is malpractice” https://www.google.com/search?q=meea+logo&es_sm=93&biw=1366&bih=643&tbm=isch&imgil=QFk7wq00RKGTDM%253A%253BHj3SuULkS-vEiM%253Bhttp%25253A%25252F%25252Fwww.mwalliance.org%25252F&source=iu&pf=m&fir=QFk7wq00RKGTDM%253A%252CHj3SuULkS-vEiM%252C_&usg=__HbMruBaa2svwQRFP8-oTi8DdM6Q%3D https://www.google.com/search?q=save+hvac+logo&es_sm=93&biw=1366&bih=643&tbm=isch&imgil=ryMswUtCv4h2KM%253A%253BtfEznZdvSpBakM%253Bhttp%25253A%25252F%25252Fhvacsave.com%25252F&source=iu&pf=m&fir=ryMswUtCv4h2KM%253A%252CtfEznZdvSpBakM%252C_&usg=__NVsFN-Un8-3dWQ0cnJERFlypEOk%3D
- Dale So, what is HVAC Performance? Unfortunately the industry hasn’t settled on standard language. Sometimes it’s called Commissioning, System Efficiency, Right Sizing or Performance Tune-up. By any definition, HVAC Performance recognizes that real efficiency does not equate to rated efficiency. In fact, that real efficiency is something less than rated efficiency. HVAC Performance also recognizes that the contractor has an impact on real efficiency. Unfortunately, a furnace, heat pump or AC is not simply plugged in the wall and you’re done. There is a lengthy installation process, guided by a 60-70 page manual, and performed by a seasoned, certified and sometimes licensed professional. To assume all these professionals perform the same level of work and that it’s always perfect, is not born out in field data. Rather, HVAC performance considers the impact the contractor has on the installation, commissioning/re-commissioning and sizing & selection. These processes are particularly impactful in the more difficult replacement environment. So, HVAC performance shifts the evaluation of efficiency from “out-of-the-box” as determined by a handful of engineers in a lab environment with nothing attached to the furnace, to “installed and operating” as that specific box is performing within a system. In fact, a fundamental principal of HVAC performance and the HVAC SAVE program is that operating efficiency is a far better measure of true efficiency since it is measured and not deemed.
- Dale Furnace AFUE is determined by engineers in a lab, while HVAC Performance measures everything added to the furnace in the field. It’s easy to assume if you have a brand new furnace or air conditioner in your home that the equipment is operating at peak performance. Unlike other appliances in your home such as a refrigerator or stove, your HVAC equipment cannot just be taken out of the box and plugged in. Your HVAC equipment depends on a series of ducts and registers winding through your unique home and if the new unit is not properly matched with the existing ductwork, your equipment may not be operating at its optimum capacity. If the equipment is not operating as efficiently as possible it means higher monthly utility bills, decreased comfort, decreased indoor air quality, and possibly higher maintenance costs.
- This graphic depicts the components of HVAC performance. If any of these measures or calculations are outside of manufactured specifications optimal efficiency will be affected. HVAC Performance Testing has 5 components. Static pressure, or the resistance to airflow in the system Temperature rise or drop is the rise in temperature in the heating mode. Manufacturers provide a range, usually around 40-70 degrees. Drop refers to the decrease in temperatures when the AC is running, typically around 20 degrees.3. BTU loss is the measured loss of heat between the furnace and the registers. 3. CFM loss from the furnace to the registers is the comparative measurement between the output at the furnace and what comes out of the registers. 5. Combustion analysis measures flue gases for oxygen and CO to determine the percentage of unburnt gas. 6. In addition to testing, calculating heat loss with modeling programs like Right Soft and the use of AHRI certified components, which addresses matching furnaces with coils, will insure the equipment chosen is the correct size.
- This chart shows the results of 507 systems tested by contractors for the month of April 2015 in western Illinois and Iowa under the SAVE program. Each one of those vertical lines you see represent individual unit that was tested by SAVE qualified contractors. In these existing homes that were tested the equipment was had an average SAVE score of 72 in other words the system was only delivering 72% of their expected BTUs. As you can see from the chart a passing score is a 85. In this month only 16% of systems that were tested received a passed to the SAVE standard. This is a significant sampling size which is backed up by a DOE study titled Energy Savings from System Efficiency Improvements in Iowa’s HVAC SAVE Program were in this study the result were similar.
- Almost complete need to work on the recording. https://3dwarehouse.sketchup.com/model.html?id=99786109b57ac2633da733904abda387 created by: Callum H. ***Script Here is an example of a typical 80% eff FAF There are four areas where you will want to test for static pressure Before the filter Please note that with all testing location you will need to be sure the static pressure tip is always pointing in the direction of airflow At the blower cabinet is another test location When testing here you want to be sure that none of the blower components come in contact with the pressure probe The third testing location is at the heat exchanger cabinet This should be tested in a safe area saying clear of the heat exchanger. There are a few safe options when testing here. Always be sure to check the manufacture drawing before drilling any holes. Removing the high limit switch and using this as an access hole for a test position Or 2” down and 6” from the rear is normally a safe area The fourth and final testing location is after the A-coil Again as with all test location care must be taken not to damage components This video is only shows one of total system efficiency. To ensure a system is operating at peak performance other test are needed. Some of those other test that are needed will be mentioned later in the presentation.
- The Environmental Protection Agency (EPA) estimates that nearly half of all home HVAC systems are not operating as advertised due to improper installation and/or poor maintenance. Here’s a list of typical adjustments that may need to be made in order for a system to function correctly. Adjusting fan speed setting to best match the ductwork Repairs and sealing ductwork to reduce CFM losses Insulating duct work outside conditioned space to minimize BTU loss Adding returns or supplies to lower static pressure Combustion tuning Correcting filter type decrease static pressure Link from SAVE website http://www.hvacsave.com/homeowner/faqs/list where this statement is made.
- This chart show the simple payback for a force air systems improvement with typical utility incentives include. The utilities that are offering these types of incentives will be mentioned later in the presentation and a links to there websites are provided at the end of the presentation. All of these adjustments will pay for themselves within 10 years. And that great, but what really impressive is that some of the utilities are offering basically free tune-ups and a way to get SAVE certified contractors homes to test the efficiency of they systems. Incentives like these have fueled the growth of this program. Later in the presentation will see just how much this program has grown since inception. The total cost and energy savings are from data collected in Iowa from a sampling of homes. The utilities incentives are from Midamerican rebate program.
- https://www.ibm.com/developerworks/community/blogs/invisiblethread/entry/five_benefits_of_agile_practices?lang=en
- Double check sizing/alignment The benefits of system verification impact all these stakeholders.
- When programs promise or suggest savings, accuracy and transparency with clients and utilities is crucial. SAVE delivers these objectives by allowing us to develop an accurate scope of work and not relying on contractors ideas. By training HVAC contractors, we establish a process with them that delivers uniform bids, eliminates any confusion on their part, and provides the best opportunity for our success and theirs.
- First, energy savings. Approximately 31 states now have energy efficiency regulations in place. Those regulations are built on savings goals and investment budgets. As I mentioned earlier meeting, those savings goals is becoming increasingly difficult, particularly in the residential/small commercial environment where the energy intensity profiles are lower and there are fewer energy consuming devices. By elevating real efficiency, HVAC performance will help you meet those savings goals. Number two, Evaluation, Measurement and Verification or EM&V. Verified savings is gaining steam in the energy efficiency business. I’ve even heard that sometime in the near future verified savings ill be required by statute. Because HVAC performance is measured and not deemed it inherently introduces EM&V into a program where it’s otherwise not currently happening. Third, many utilities are motivated simply to ensure their ratepayers are getting the full benefit of the efficiency investment they are paying into. HVAC performance creates a clear line of accountability for the contractor that protects the customer ratepayer. And last, peak demand reduction. Lowering peak is a critical issue for many utilities. Traditional heating and cooling practices are to under-perform and over size. HVAC Performance mitigates those instances by ensuring optimal performance and thus preventing the need to oversize. HVAC performance also embraces the envelope impact, load calculations and proper equipment selection in the more difficult replacement environment.
- A contractor can instill trust in his clients just by scientifically measuring and analyzing a system. This level of trust is then enhanced by the fact the promises made came to fruition. If a consumer has trust in a contractor, they will very likely recommend their services to friends, neighbor and relatives. And word of mouth referrals are the strongest advertising a contractor can have. Most contractors will agree that call backs are profit killers. When a job is done right the first time, increased customer satisfaction results because the clients see real savings. It Also results in fewer call-backs and therefore increased profits.
- Many times people are disappointed in the their purchase of high efficiency equipment because their utility bill didn’t reflect the deemed savings. A SAVE certified system will deliver the expected savings by delivering the BTUs to the rooms it is intended to condition. This results in increased comfort, which is a payback in itself in many cases. SAVE can also eliminate the sound of restricted airflow caused by high static pressure and by having the static at the manufacturers specs, reduce wear and tear on the blower motor. So this is really a win, win, win situation.
- At the assessment (That my hand by the way in the first photo. ) At the assessment baseline measurements are taken to evaluate the systems. The results from these test are use to help us determined which if any repairs or adjustments need to be made. This data is also used to estimate energy savings to calculate the ROI for the customer. In the office We place the data that was collected in the field in the SAVE web-based software to obtain the SAVE score. The software not only gives us the score but it also prescribes a list of possible solutions to address the issues with the system, telling us what repair may need to be made to get the system operating peak performance. After repair work is complete We then verify that work was done to the customers satisfaction and test-out the system to ensure we have the results we were expecting. If this was a complete system replacement we would be retesting the system to verify the contractors test results. By requiring commissioning, measurement & verification for compliance of all new furnace system installations. We are able to have a higher degree transparency & accountability with the contractor through-out the system upgrade process.
- We pride ourselves on our high level of customer service and the fact that we are a single point of contact for any issues that might occur during the installation process. This is why our construction management team conducts 100% QA/QC of each job that is awarded to contractors. All contractors know that mistakes will cost you and call back are even more expensive. If our team is able to identify a problem early in the installation process we help our contractors by providing them guidance and support. This translates to fewer call backs for the contractors means better profits. This also gives the people we services that reassurance that the job will be done right. Besides the measurements taken at the pre and post insulation we also monitor utility data to accurately report the real saving generated by the implementation of those measures.
- To identify efficiency opportunities, When existing equipment is underperforming, when there have been equipment failures or when a furnace is scheduled for replacement. A forced air furnace should have a life expectancy of about 20 years. If a blower motor has failed in 6 years, it would be prudent to check the static, since high static will make the motor work harder and longer. And perhaps most importantly, when new equipment is to be installed. Having the pool of trained contractors allows us to set the expectations high, get competitive, apples to apples bids without having to sort through unqualified proposals such as simple cabinet swaps. This is how we are using the SAVE methodology in our programs.
- http://www.startupist.com/2015/05/13/15-awesome-quotes-to-inspire-business-growth/
- http://renewableenergy.illinoisstate.edu/downloads/speaker_presentations/071515_ilrec/EFFICIENCY%201015%20A%20Sarah%20Edwards%20PDF.pdf In the last 4 years, over 2000 contractors have been certified, resulting in more than 30,000 quality installations. I think most businesses would be envious of the growth SAVE has accomplished. And it’s not by accident. Time after time, HVACSAVE has made improvements on simple furnace swap and new installations.
- MidAmerican Energy offers really good incentives for HVAC efficiency, but to collect, the component or system must be SAVE certified. CEE??
- [AK] Need to stress importance or growth of this new standard for HVAC evaluation. Maybe we can compare AFUE to installed efficiencies? Are there any ways to show that? Do we need permission for these? In Iowa, Alliant Energy, Black Hills Energy, Cedar Falls Utilities, and MidAmerican Energy all require that homeowners seeking a rebate for new equipment use an HVAC SAVE certified professional to do the installation. Heating and cooling costs are typically the largest energy expense for more U.S. homes and utilities are interested in reducing wasted energy use; HVAC SAVE is one are of focus to achieve those goals. CFU-Water, electricity, natural gas, high-speed Internet and cable television services are all provided by community-owned utilities in Cedar Falls, a community of 39,000 in northeast Iowa. Cedar Falls Utilities strives to achieve a standard of excellence as an industry leader and a trusted provider of utility services to its customers and community. CFU&apos;s mission is to provide customers with innovative, high-quality services that bring the best value to the community. These services include 30 years of offering audits, incentives, financing, and educational resources to aid customers with their energy efficiency projects. MidAmerican Energy Company -is a global leader in the production of energy from diversified fuel sources including geothermal, natural gas, hydroelectric, nuclear, coal and wind. MidAmerican also leads in the supply and distribution of energy in the U.S. and U.K. consumer markets, with approximately 6.7 million electricity and gas customers. MidAmerican and its subsidiaries, MidAmerican Energy Company, PacifiCorp, CE Electric UK, CalEnergy Generation, Kern River Gas Transmission Company and Northern Natural Gas are established leaders in the world energy marketplace. In production, distribution and delivery around the world - MidAmerican is obsessively, relentlessly at your service. Based in Des Moines, Iowa the company employs more than 11,000 people and provides service to more than 698,000 electric customers and more than 680,000 natural gas customers in a 10,600 square-mile radius. Black Hills Energy is a Black Hills Corporation company that provides electric and natural gas service to over 600,000 customers in Colorado, Iowa, Kansas and Nebraska. Black Hills Corporation is a diversified energy company with a tradition of exemplary service and a vision to be the energy partner of choice - is based in Rapid City, S.D., with corporate offices in Golden, Colo., and Omaha, Neb. The company serves 762,000 utility customers in Colorado, Iowa, Kansas, Montana, Nebraska, South Dakota and Wyoming. The company&apos;s non-regulated businesses generate wholesale electricity, produce natural gas, oil and coal, and market energy. We partner to produce results that improve life with energy. More information is available at Black Hills Corporation. Alliant Energy Corporation is an energy holding company with regulated utility providers as well as non-regulated companies involved in delivering energy-related products and services. Headquartered in Madison, Wisconsin, Alliant Energy serves more than three million customers around the globe. Alliant Energy has nearly 8,500 employees across the country and abroad; operating revenues of $2.6 billion (year-end 2002); and total assets of more than $7 billion (year-end 2002). Alliant Energy&apos;s utility operations serve more than 1.4 million customers in Iowa, Illinois, Minnesota and Wisconsin. Their service territory covers 54,000 square miles in the heartland of America and includes 9,700 miles of electric transmission lines and 8,000 miles of natural gas main.
- Thanks for having me My background is in assessing MF buildings. My interactions with this research is largely on helping integrate this research into current field applications. CARD Grant, 2013 - 2015
- We would like to acknowledge and thank the MN Division of Energy Resources and the Conservation Applied Research & Development (CARD) support that funded this research.
- We began looking into central ventialtion systems years ago when we were hired by multiple clients who had assorted problems with ventilation. Over time we began to discover numerous opportunities with these centralized systems. As a result, we were awarded a grat to look into methods of diagnosing, retrofiting and verifying these systems and the impact of these changes in buildings.
- 2 main types of central systems Central systems as opposed to individual ventilation, like what we are used to seeing in single familly homes where you’re switching a fan motor off and on that is individually ducted to exterior. These are ducted together, and are served by a common, central fan. Out of whack buildings. Higher flows up top. Near zero flows near bottom. Balancing flows and reducing overall flows balances and delivers the appropriate amount of ventilation without over-ventilating.
- ventilation system information obtained from 249 Wisconsin buildings that participated in a 2001-03 CEE Focus On Energy efficiency program MN MF energy characterization study did not look at ventilation systems, so this is based on WI
- Buildings systems in study: 12 central exhaust ventilation systems 16 corridor supply or make up air ventilation systems 11 Trash chute systems Retrofits: 3 exhaust system retrofits, 2 with duct sealing included 1 corridor supply air handler retrofit 2 Trash chute retrofits
- Reduce fan speed to provide code required ventilation flow
- 28 stories, 193 units. Built 1970. Senior housing
- Heating control issue surfaced with reduced flow. Steam valve controls need adjustment to prevent room above from overheating (excess coil heat is not being distributed)
- 60-70% electric savings pays for fans well within 10 year lifespan (6-7 years) Speed adjustment allows easy flow adjustment that can’t be tampered with
- 60-70% electric savings pays for fans well within 10 year lifespan (6-7 years) Speed adjustment allows easy flow adjustment that can’t be tampered with
- 81 unit, 14 story building in Minneapolis. Built 1972. Market rate housing for singles, couples, families. Mix of 1 and 2 bdrms
- Duct leakage prevented full turndown on 3 of 10 fans (bath ducts were a problem). Aeroseal attempt on one shaft was unsuccessful.
- 12% reduction in gas and electricity costs for this building.
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- Screen: Characterize system (low, acceptable, high), Close the deal Diagnostics: more detailed flow measurements for “pre-retrofit” flow, identify solution for energy savings and improved ventilation performance (i.e. balanced flow to all parts of building). Verification: Check to ensure flow
- Echoing Elevate’s approach—single point of contact, verification of savings. Providing a low cost assessment —very low intial cost makes this assessment marketable
- Building Owners - Contact us for resources Qualified contractors, building assessments Designers and developers - Consider changing specs Fixed orifices Verified inlet and outlet flows Contractors and program implementers - Train staff & incorporate process Assessment and Retrofit Guide CEE upcoming training
- CORRIE: 6 years in residential building efficiency BPI certified Building Analyst IECC Commercial Energy Inspector 10+ years in residential construction B.S. Natural Resources and Environmental Studies, UMTC DALE: 25 years of construction experience BPI, RESNET, LEED, NAHB NCI Residential HVAC Systems Performance MEEA HVAC SAVE TIMOTHY: 8 years technical research experience BPI Building Analyst and Envelope Professional NCI Residential HVAC Systems Performance
- -by zip code -King County assessor office data (extracted Sept 2015)