Calling all Homeowners: Learn How to Reduce Your Energy Bill
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Transcript of Calling all Homeowners: Learn How to Reduce Your Energy Bill
Greening Your World…
22
Vision: Creating a Sustainable Energy Future
• Areas of Focus
• Energy Efficiency
• Renewable Energy
• Green Buildings
• Climate Change
• Transportation
33
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
44
Trash Disposal Compostables
Recycle
55
Housekeeping
• Online Registration is the best way to guarantee a spot
• Restrooms
• Phones Off
• Shhhh. . . Quiet in Hallway
• Sign-in Sheets & Evaluations
66
CCSE Disclaimer
Workshops are provided as a public service with the
understanding that the California Center for Sustainable Energy
makes no warranties, either expressed or implied, concerning
the accuracy, completeness, reliability, or suitability of the
information.
The California Center for Sustainable Energy does not
endorse any particular product, manufacturer or service
mentioned and does not represent that any goods or services
are fit for any purpose or use.
77
Household Energy Use - Nation
88
Household Energy Use - California
99
Example Residential Utility Bill
1010
Gas Charges
1111
Electric Charges
9.45
5.08
27.84
44.99
1212
Taxes and Fees
1313
Big Savers
• Lighting
• Insulation
• Ducting
• Air Conditioning
1414
Lighting
Incandescent:
• 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
1515
Lighting
Compact fluorescent:
• Excited gas produces light
• Efficient: 50-100 lumens per watt
• Lamp life is about 8,000-10,000 hours
• Specialized Disposal
1616
Lighting - Retrofitting
Retrofitting 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.
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Lighting – Example Calculations
Device Watts x Hours per
Day x
Days
per
Year
÷Convert
to kWh = kWh x
kWh Rate
(assumed) =
Cost
per
Year
60W 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
Device Watts x Hours
per Day x
Days
per
Year
÷Convert
to kWh = kWh x
National
Average
Mercury
Emissions
(mg/kWh)
+Landfill
(mg)=
Total Mercury
(mg)
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 0.187
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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.
1919
Building Envelope
Air Leakage
• Leaking air into the home is called infiltration
• Leaking air out of the home is called exfiltration
Energy 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
2020
Building Envelope – Common Areas of Air Leaks in Homes
2121
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Building Envelope - Insulation
Thermal 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.
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Building Envelope
Types of Insulation
There 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.
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Building Envelope
Types of Insulation
Foam board or rigid foam: Rigid panels of
insulation. This type of insulation can be used
to insulate almost any part of your home.
Sprayed Foam: This type of insulation can be
sprayed, foamed-in-place, injected or poured.
Its ability to fill the smallest spaces gives it
twice the R-value per inch when compared to
traditional batt insulation
Reflective: Fabricated from aluminum
foils with different backings such as
cardboard. This type of insulation is
typically used between wood rafters, floor
joists or wall studs
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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
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Building Envelope – Insulation/Sealing/Housewraps
2727
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%
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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
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Ducts
• Ducts carry conditioned air
• Often very leaky (22% by volume)
• Installed in unconditioned spaces
3030
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
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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%
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Operating Your HVAC EfficientlyHVAC Thermostat Control: A thermostat is a temperature-sensitive switch that controls a
space 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 savings
will 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. Energy
savings will depend on how much you raise the thermostat settings and how hot the climate is.
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Heating Ventilation and Air Conditioning (HVAC) Buying GuideAC Buying Guide:
1. Buy the right size – too large a unit
can waste energy and too small will
not be able to do the job
2. Always look for the EnergyStar
Label and EnergyGuide.
3. Buy high energy efficiency
equipment – the right side table
shows efficiency rating for typical
residential HVAC units
• e.g. a window unit with an EER
of 12.0 would use 25% less
electricity to deliver the same
amount of cooling as a unit with
EER of 9.0
HVAC Equipment Efficiency Rating
Window Air Conditioner Energy Efficiency Ratio
(EER)
Central Air ConditionerSeasonal Energy Efficiency Ratio
(SEER)
Heat Pump (Split) - CoolingSeasonal Energy Efficiency Ratio
(SEER)
Heat Pump (Split) - HeatingHeating Seasonal Performance Factor
(HSPF)
Heat Pump (Packaged) - CoolingSeasonal Energy Efficiency Ratio
(SEER)
Heat Pump (Packaged) - HeatingHeating Seasonal Performance Factor
(HSPF)
Gas FurnaceAnnual Fuel Utilization Efficiency
(AFUE)
3434
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
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Air Conditioning Impacts
• 1100 kWh/year savings
• $360 savings in annual energy costs
• Simple payback: 7 years
• Internal Rate of Return: 7.7%
3636
HERS Testing
• Home Energy Rating System (HERS)
• Provides standardized rating for homes
• Can help quantify savings
• Cost effective ―insurance‖ of a job well done
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HERS test example: Detecting Air Leaks
Blower Door Test:
3838
Appliances
• Energy Star: Federal standard for
energy efficiency
• Labels make information accessible
• Often have rebates
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How to Use the EnergyGuide Label
4040
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.
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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.
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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
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How to Use the EnergyGuide LabelAppliances Rating Special Considerations
Refrigerators and Freezers Look for the EnergyGuide label that
tells how much electricity, in kWh,
the refrigerator will use in one year.
The smaller the number, the less
energy it uses. ENERGY STAR
refrigerators use at least 15% less
energy than required by federal
standards.
Look for energy-efficient
refrigerators and freezers.
Refrigerators with freezers on top
are more efficient than those with
freezers on the side. Also look for
heavy door hinges that create a
good door seal.
Dishwashers Look for the EnergyGuide label that
tells how much electricity, in kWh,
the dishwasher will use in one year.
The smaller the number, the less
energy it uses. ENERGY STAR
dishwashers use at least 25% less
energy than required by federal
standards.
Look for features that will reduce
water use, such as booster heaters
and smart controls. Ask how many
gallons of water the dishwasher
uses during different cycles.
Dishwashers that use the least
amount of water will cost the least
to operate.
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How to Use the EnergyGuide LabelAppliances Rating Special Considerations
Clothes Washers Look for the EnergyGuide label that
tells how much electricity, in kWh,
the clothes washer will use in one
year. The smaller the number, the
less energy is uses. ENERGY STAR
clothes washers use less than 50%
of the energy used by standard
washers.
Look for the following design
features that help clothes washers
cut water usage: water level
controls, "suds-saver" features,
spin cycle adjustments, and large
capacity. For double the efficiency,
buy an ENERGY STAR unit.
4545
Questions?