Pre $754 Post $557 $377 v $278$377 v $278$377 v $278

Florida Solar Energy Center

Typical Projected Annual Energy Use for 70 Florida Homes

Retrofit Status

CondArea Ft2

Average

Day kWh

Average Day $

Average

Month $

Average

Year $

Average

Year $/Ft2

Before 1,365 ft2

40 kWh $ 5.16 $ 157 $ 1,885 $1.42

After 1,365 ft2

29 kWh $ 3.82 $ 116 $ 1,394 $1.05

Typical Cooling Load

Energy Use in Florida

Building America Partnership for Improved Residential Construction

Decade Average Pre-retrofit HERS Index Scores

1970’s 132

1990’s 112

2000’s 107

1960’s 150 1980’s 125

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ZeroEnergy

New HomeBefore Solar

Building America Partnership for Improved Residential Construction

HERS Index Examples

2000’s = 107

4

1960’s = 150

Solar Ready = 55Zero Energy = -6

How Low Can Existing Homes Go? Cost Effectively!

Building America Partnership for Improved Residential Construction

Cost Effective Efficiency Enhancements and Replacements

• Anytime, low-cost measures: • Behavior Modification• House sealing* (92% of the deep retrofits) • Duct sealing* (86%)• CFLs (52% increased CFL count by 30%+)• Programmable thermostat (48%)• New: Insulate hot water heater* & accessible hot water pipes

• Anytime, moderate-cost measures• Insulate ceiling to R-38 (93% insulated to R-30+)

*Heed combustion safety cautions. Contact Janet McIlvaine, 321-638-1434

5

Building America Partnership for Improved Residential Construction

• At replacement, no/low cost measures: (Higher efficiency choices at change-out)

• ENERGY STAR® appliances (76% of the deep retrofits)• Higher efficiency water heater (EF ≥ 0.92) (70%)

– Consider much bigger savings with heat pump water heater or solar or instantaneous gas

• Choose higher insulated (R-6) duct work (39%)• Choose lighter exterior colors when time to reroof (30%)• ...or paint exterior (30%)• ENERGY STAR® fans (15%)

6

Cost Effective Efficiency Enhancements and Replacements

Building America Partnership for Improved Residential Construction

• At replacement, moderate/high cost measures: (Higher efficiency choices at change-out)

• ≥15 SEER AC; Heat pump in Central FL (96% of the deep retrofits replaced ACs, 95% of those SEER ≥ 15)

• ENERGY STAR® windows or apply low SHGC film (80%)(SHGC ≤ 0.27; U-value ≤ 0.60)

7

Cost Effective Efficiency Enhancements and Replacements

Building America Partnership for Improved Residential Construction

Good Habits…• Behavior Modification

– Maintain your central air conditioner• Keep filter clean• Set fan to “auto” instead of “on”• Set thermostat as high as you are comfortable and maintain ~5°

higher when not at home– Every 1° cooler = Approx 6% cooling energy

– Turn off ceiling fans when occupants are not present (1 fan continuous oper. = approx $7/month)

– When washing in hot water, adjust the load selector to match the actual size of the load.

– Keep the lint filter in your dryer clean

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