Calling all Homeowners: Learn How to Reduce Your Energy Bill


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Is your monthly energy bill too expensive? Discover the tools available to help you manage your homes energy consumption, reduce your energy bills, and save money. This course will cover the economics of energy efficiency, how to pair an efficient home with distributed generation and how these actions will benefit your pocketbook.

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Calling all Homeowners: Learn How to Reduce Your Energy Bill

  1. 1. Greening Your World…
  2. 2. Vision: Creating a Sustainable Energy Future • Areas of Focus • Energy Efficiency • Renewable Energy • Green Buildings • Climate Change • Transportation 22
  3. 3. CCSE Services • Cash Incentives • Educational Workshops • Resource & Tool Lending Libraries • Technical Assistance • Technology Display Center • Distributed Generation Assessment Services • Carbon Impact Assessment and Management • Technical and Policy support for Local Governments 33
  4. 4. Trash Disposal Compostables Recycle 44
  5. 5. Housekeeping• Online Registration is the best way to guarantee a spot• Restrooms• Phones Off• Shhhh. . . Quiet in Hallway• Sign-in Sheets & Evaluations 55
  6. 6. CCSE DisclaimerWorkshops are provided as a public service with theunderstanding that the California Center for Sustainable Energymakes no warranties, either expressed or implied, concerningthe accuracy, completeness, reliability, or suitability of theinformation.The California Center for Sustainable Energy does notendorse any particular product, manufacturer or servicementioned and does not represent that any goods or servicesare fit for any purpose or use. 66
  7. 7. Household Energy Use - Nation 77
  8. 8. Household Energy Use - California 88
  9. 9. Example Residential Utility Bill 99
  10. 10. Gas Charges 1010
  11. 11. Electric Charges 9.45 5.08 27.84 44.99 1111
  12. 12. Taxes and Fees 1212
  13. 13. Big Savers• Lighting• Insulation• Ducting• Air Conditioning 1313
  14. 14. LightingIncandescent:• Filament is heated to incandescence by an electric current, producing visible light• 5% of energy makes useful light.• Very inefficient: 15 lumens per watt• Lamp life is about 2,000 hours 1414
  15. 15. LightingCompact fluorescent:• Excited gas produces light• Efficient: 50-100 lumens per watt• Lamp life is about 8,000-10,000 hours• Specialized Disposal 1515
  16. 16. Lighting - RetrofittingRetrofitting Incandescent with CFLs• Rule of thumb of 4:1 for can be applied when replacing incandescent bulbs with CFLs. • 40-watt incandescent = 10-watt CFL • 60-watt incandescent = 15-watt CFL • 75-watt incandescent = 19-watt CFL • 100-watt incandescent = 25-watt CFL• CFLs produce 75 % less heat than Incandescent and cut home cooling cost. 1616
  17. 17. Lighting – Example Calculations Days Cost Hours per Convert kWh Rate Device Watts x x per ÷ = kWh x = per Day to kWh (assumed) Year Year60W Incandescent 60 x 4 x 365 ÷ 1,000 = 88 x 0.14 = $12.32 15W Globe CFL 15 x 4 x 365 ÷ 1,000 = 22 x 0.14 = $3.08 Savings 66 $9.24 National Days Average Total Hours Convert Landfill Device Watts x x per ÷ = kWh x Mercury + = Mercury per Day to kWh (mg) Year Emissions (mg) (mg/kWh) Old Lamp 60 x 4 x 365 ÷ 1,000 = 87.4 x 0.012 + 0 = 1.049 New Lamp 15 x 4 x 365 ÷ 1,000 = 21.8 x 0.012 + 0.6 = 0.862 Savings 65.6 17 0.18717
  18. 18. Insulation• Heat flows naturally from a warmer to a cooler space.• Insulation in your home to provide resistance to heat flow.• Heat flows through wherever there is a difference in temperature: • Ceilings • Walls • Floors • Crawlspaces • Windows • Doors• More insulation means more energy savings. • Insulation measured with an ―R‖ value. 1818
  19. 19. Building EnvelopeAir Leakage• Leaking air into the home is called infiltration• Leaking air out of the home is called exfiltrationEnergy Audit Tips: plugging the leaks• Check for holes or cracks around walls, ceilings, windows, doors, light and plumbing fixtures, switches, and electrical outlets that often leak.• Check insulation levels in attic, walls, ceilings, floors, basements and crawl spaces• Check for open fireplace dampers 1919
  20. 20. Building Envelope – Common Areas of Air Leaks in Homes 2020
  21. 21. 2121
  22. 22. Building Envelope - InsulationThermal Resistance (R):• The effectiveness of insulation is rated in terms of thermal resistance, called R-value, which indicates the resistance to heat flow.• Higher R-values mean more insulating power. The R-value of thermal insulation depends on the type of material, its thickness, and its density. 2222
  23. 23. Building EnvelopeTypes of InsulationThere are several common types of insulation — blanket (batts or rolls), loose fill, foam board or rigid foam, spray foam and reflective insulation. Blanket: Most common type of insulation. It can be hand cut and trimmed to fit. Usually made of fiberglass, mineral wool, plastic fiber or natural fibers Loose-fill: Usually made of small particles of fiberglass, rock wool, or cellulose. Good for retrofits and hard-to-reach areas. 2323
  24. 24. Building EnvelopeTypes of InsulationFoam board or rigid foam: Rigid panels ofinsulation. This type of insulation can be usedto insulate almost any part of your home. Sprayed Foam: This type of insulation can be Reflective: Fabricated from aluminum sprayed, foamed-in-place, injected or poured. foils with different backings such as Its ability to fill the smallest spaces gives it cardboard. This type of insulation is twice the R-value per inch when compared to typically used between wood rafters, floor traditional batt insulation joists or wall studs 2424
  25. 25. Energy Pro 5 Example: Insulation• 2000 sq ft house in San Diego• R-11 attic• Upgrade to R-30 attic, seal envelope• $4,300 cost• May qualify for Federal tax credit 2525
  26. 26. Building Envelope – Insulation/Sealing/Housewraps 2626
  27. 27. Insulation Impacts• 1200 kWh/year savings• 68 Therms/year• $480 saved in annual energy costs• Simple payback: 9 years• Internal Rate of Return: 6.7% 2727
  28. 28. Evaluating Savings• Simple Payback • Initial cost ÷ yearly savings • Poorly captures value of complex cash flows • Ignores time value of money• Internal Rate of Return (IRR) • Used to compare profitability of different investments • Best used for similar projects 2828
  29. 29. Ducts• Ducts carry conditioned air• Often very leaky (22% by volume)• Installed in unconditioned spaces 2929
  30. 30. Energy Pro 5 Example: Insulation• 2000 sq ft house in San Diego• R-2.1, leaky ducts• Upgrade to R-6 sealed ducts• $1,500 cost• May qualify for Federal tax credit 3030
  31. 31. Duct Impacts• 410 kWh/year savings• 106 Therms saved• $250 savings in annual energy costs• Simple payback: 6 years• Internal Rate of Return: 8.9% 3131
  32. 32. Operating Your HVAC EfficientlyHVAC Thermostat Control: A thermostat is a temperature-sensitive switch that controls aspace conditioning unit or system, such as a furnace or air conditioner, or both.Heating Season (winter): keeping the temperature a little lower will save energy. Energy savingswill depend on how much you lower the thermostat settings and how cold the climate is.Cooling Season (summer): raising the temperature a little higher will save energy. Energysavings will depend on how much you raise the thermostat settings and how hot the climate is. 3232
  33. 33. Heating Ventilation and Air Conditioning (HVAC) Buying GuideAC Buying Guide:1. Buy the right size – too large a unit HVAC Equipment Efficiency Rating can waste energy and too small will Energy Efficiency Ratio not be able to do the job Window Air Conditioner (EER)2. Always look for the EnergyStar Label and EnergyGuide. Seasonal Energy Efficiency Ratio Central Air Conditioner (SEER)3. Buy high energy efficiency equipment – the right side table Heat Pump (Split) - Cooling Seasonal Energy Efficiency Ratio (SEER) shows efficiency rating for typical residential HVAC units Heating Seasonal Performance Factor Heat Pump (Split) - Heating (HSPF) • e.g. a window unit with an EER Seasonal Energy Efficiency Ratio of 12.0 would use 25% less Heat Pump (Packaged) - Cooling (SEER) electricity to deliver the same Heating Seasonal Performance Factor amount of cooling as a unit with Heat Pump (Packaged) - Heating (HSPF) EER of 9.0 Annual Fuel Utilization Efficiency Gas Furnace (AFUE) 3333
  34. 34. Energy Pro 5 Example: Air Conditioning• 2000 sq ft house in San Diego• 7 SEER• Upgrade to 13 SEER• $2,500 cost• May qualify for SDG&E rebate 3434
  35. 35. Air Conditioning Impacts• 1100 kWh/year savings• $360 savings in annual energy costs• Simple payback: 7 years• Internal Rate of Return: 7.7% 3535
  36. 36. HERS Testing• Home Energy Rating System (HERS)• Provides standardized rating for homes• Can help quantify savings• Cost effective ―insurance‖ of a job well done 3636
  37. 37. HERS test example: Detecting Air Leaks Blower Door Test: 3737
  38. 38. Appliances• Energy Star: Federal standard for energy efficiency• Labels make information accessible• Often have rebates 3838
  39. 39. How to Use the EnergyGuide Label 3939
  40. 40. Home Appliances – Refrigerators and Freezers• Refrigerators consume about 18% of all electricity in a typical Californian home .• Refrigerators have become much more efficient in the past 20 years, using 60% less electricity on average than 20-year-old models.• If you have an old, inefficient refrigerator, you may be paying $280 a year in electricity in areas with high electricity rates. A new, more efficient model will lower your electric bill and save you money, which in turn will offset the cost of purchasing a new refrigerator. 4040
  41. 41. Home Appliances – Clothes Washers• A typical household clothes washer can cost as much as $1,500 to operate over its lifetime (12 years).• Almost 90% of all energy used in operating a washing machine goes towards heating the water.• By investing in a new, efficient front- or top- loading washer, homeowners can dramatically save energy, water and money.• An ENERGY STAR qualified clothes washer can save you up to $875 in energy and water costs over the life of the machine. 4141
  42. 42. Home Appliances – Dishwashers • Approximately 80% of the energy used by dishwashers goes toward heating the water. • New dishwasher designs have reduced water use • Consumers can save $25 to $35 a year in energy costs by replacing a 10-year-old dishwasher with an ENERGY STAR qualified model, and save more than 1,000 gallons of water per year. • The average dishwasher lasts up to 12 years 4242
  43. 43. How to Use the EnergyGuide Label Appliances Rating Special ConsiderationsRefrigerators and Freezers Look for the EnergyGuide label that Look for energy-efficient tells how much electricity, in kWh, refrigerators and freezers. the refrigerator will use in one year. Refrigerators with freezers on top The smaller the number, the less are more efficient than those with energy it uses. ENERGY STAR freezers on the side. Also look for refrigerators use at least 15% less heavy door hinges that create a energy than required by federal good door seal. standards.Dishwashers Look for the EnergyGuide label that Look for features that will reduce tells how much electricity, in kWh, water use, such as booster heaters the dishwasher will use in one year. and smart controls. Ask how many The smaller the number, the less gallons of water the dishwasher energy it uses. ENERGY STAR uses during different cycles. dishwashers use at least 25% less Dishwashers that use the least energy than required by federal amount of water will cost the least standards. to operate. 4343
  44. 44. How to Use the EnergyGuide Label Appliances Rating Special ConsiderationsClothes Washers Look for the EnergyGuide label that Look for the following design tells how much electricity, in kWh, features that help clothes washers the clothes washer will use in one cut water usage: water level year. The smaller the number, the controls, "suds-saver" features, less energy is uses. ENERGY STAR spin cycle adjustments, and large clothes washers use less than 50% capacity. For double the efficiency, of the energy used by standard buy an ENERGY STAR unit. washers. 4444
  45. 45. Questions? 4545