Greening Your World…

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Vision: Creating a Sustainable Energy Future

• Areas of Focus

• Energy Efficiency

• Renewable Energy

• Green Buildings

• Climate Change

• Transportation

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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

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Trash Disposal Compostables

Recycle

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Housekeeping

• Online Registration is the best way to guarantee a spot

• Restrooms

• Phones Off

• Shhhh. . . Quiet in Hallway

• Sign-in Sheets & Evaluations

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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.

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Household Energy Use - Nation

88

Household Energy Use - California

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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

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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

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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.

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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

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Building Envelope – Common Areas of Air Leaks in Homes

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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

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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

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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)

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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%

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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:

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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

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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.

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Questions?