The Mallett Deep Energy Retrofit

369 views
254 views

Published on

Energy Circle Founder/CEO Peter Troast's presentation to the American Institute of Architects' AIA+2030 lecture series.

0 Comments
1 Like
Statistics
Notes
  • Be the first to comment

No Downloads
Views
Total views
369
On SlideShare
0
From Embeds
0
Number of Embeds
17
Actions
Shares
0
Downloads
3
Comments
0
Likes
1
Embeds 0
No embeds

No notes for slide

The Mallett Deep Energy Retrofit

  1. 1. The Mallett Deep Energy Retrofit A Renovation for the Next 125 Years
  2. 2. Peter Troast• Founder & CEO of Energy Circle• Information Website and eCommerce store of user-tested Energy Efficiency Gear • Energy Monitors, Lighting, Smart Strips, Timers & Switches • My house: Kill-a-Watt, Blueline, TED 1000, TED 5000, eMonitor• Energy Efficiency Auditor/Contractor Web & Marketing Software Platform • 200+ Customers in 46 States, ME to CA to FL to AK• Passionate About • Deep Energy Retrofits • Real time energy monitoring • Success of home performance contractor sector DATE 2
  3. 3. Deep Energy Retrofits& Historic Preservation Incompatible? 3
  4. 4. 39% 27%
  5. 5. Energy Use in the US Use of Energy Greenhouse Gas Emissions 27% 32% transportation transportation 30% industrial 34% 21% industrial residential 20% residential 18% 18% commercial commercial Source: US Energy Information Adm.Buildings are the single largest user of energyBuildings are the largest contributor of greenhouse gas emissions 5
  6. 6. If every home built from now until 2030 was Net Zerowe’d reduce residential building energy by ~8% 7
  7. 7. 124 Million
  8. 8. US Housing Stock Existing US Housing Stock, 1000’s 25,000 18,750 12,500 6,250 0 Pre1920 1920s 1930s 1940s 1950s 1960s 1970s 1980s 1990s 2000s significant need moderate need some need for for energy retrofit for energy retrofit energy retrofitSources: US Census Bureau, Annual Housing Survey. 9
  9. 9. The Challenge of Older HomesUse More Energy Pre-1940 homes use 32% more energy than 1980‘s Average 120MM btu’s/house vs 81MMDisproportionately Located in Cold ClimatesHave Construction Details that are Energy Challenges Basements and Crawl Spaces Heavier use of fuel oil 10
  10. 10. But it’s only 14% of homes pre-1940 11
  11. 11. 14%equals 12
  12. 12. 180 Coal Plants
  13. 13. “super-insulated houses...an even greater threat to historic housing stock...than teardowns” Sally Zimmerman Historic New England 4.29.09 14
  14. 14. DATE 15
  15. 15. Defining Deep 17
  16. 16. Defining “Deep Energy Reduction”• DOE Building America Program: 50%+ Reduction Over Code• ACI 1000 Home Challenge: 75-90% Reduction in Actual Use--Not Modeled • Measured on Actual or • Measured Against Modeled based on • Climate Zone, House Size, Occupants, Heat Sources• Home Only--no transportation, embodied, durable goods, vacations, consumables DATE 18
  17. 17. Beyond Energy & Carbon• Resiliency• Affordability• Durability• Comfort• Health• Value DATE 19
  18. 18. Naomi C. O. Beal Photo57 Depot StreetFreeport, Maine
  19. 19. Oak Street, 1894
  20. 20. DATE 24
  21. 21. The Life of 57 Depot Street 1st Half 2nd Half 25
  22. 22. Freeport Retrofit Freeport, ME  Source Energy Savings – 61% Deep Energy Retrofit Warren Construction Group Source Energy Parametric Annual Loads Study © 2010Building Science Day Month Year 26 Corporation
  23. 23. Parametric Energy Modeling DATE 27
  24. 24. All About Air Sealing. 26% of Reduction DATE 28
  25. 25. Next is Insulation: 8% DATE 29
  26. 26. High Efficiency Furnace: 7% DATE 30
  27. 27. Lower Impact DATE 31
  28. 28. Breaking Out the Reductions CFL Lighting 8% 96% Eff. Furnace 14% Windows 5% Air Sealing 53% Insulation 21% DATE 32
  29. 29. Insulating In vs Out Advantages of Going In Advantages of Going Out• Minimizes exterior impact visually • Can remain occupied• Siding and roofing not impacted • Minimize code impact (stair widths)• Windows remain in place • No impact to partitions, bearing walls• Align with interior renovation? • Align with New Siding or Roofing or Windows • Plastic materials to the exterior • Proven wall & roof assembly DATE 35
  30. 30. The Cost of Federal Funding1. Section 106 Review: National Historic Preservation Act2. HUD Rules: Low Bid Wins DATE 48
  31. 31. “finding of adverse impact” DATE 49
  32. 32. Compromises for Historic Preservation• 2” Polyiso on Walls• Insulate IN on Front Facade• Marvin Triple Glazed vs Serious Windows (Muntins) DATE 50
  33. 33. Our Attempt to Scare Off Builders A Very Aggressive Air Tightness Standard 276 CFM50 DATE 52
  34. 34. Our Attempt to Scare Off Builders An Absurd Very Aggressive Air Tightness Standard 276 CFM50 “A few buildings have achieved air infiltration of less than the target. Very few of these have been retrofit buildings. Buildings built with board sheathing, and with rubble foundations, are inherently more difficult to air seal. A target such as 276 CFM50, referenced in the Specifications, is likely unachievable with the construction as designed.” Building Science Corporation DATE 53
  35. 35. Progressive Testing! DATE 74
  36. 36. Cost Evaluation DATE 77
  37. 37. Biggest Mistake/Lesson: HVAC Hybrid Gas Furnace and Air Source Heat Pump,fully ducted, with integral HRV• 2 Ton/15 SEER Trane Heat Pump (X2)• 97% AFUE Trane Direct Vent Gas Furnace;60,000 BTU/h• RenewAire EV200 200 CFM HRV(157 W @ 181 cfm)Oversized (Manual J Cooling = 1.4 tons) Hybrid = Expensive DATE 78
  38. 38. DATE 79
  39. 39. Thank You! Peter Troast ptroast@energycircle.com www.energycircle.com @EnergyCircle 207-847-3644 DATE 80

×