2.355 crack coefficient x 16 ft x .01^.67 inches of water = 1.7 CFM without weatherization

1.536 crack coefficient x 16 ft x .01^.67 inches of water = 1.1 CFM with weatherization

Step 2 determine savings

1.7 CFM without weatherization - 1.1 CFM with weatherization = 0.6 CFM

Step 3 determine cooling energy

0.081 density of air (lb/cu ft) x 0.240 heat capacity of air (BTU/lb °F) x 2008 CDD (°F day) x 0.6 CFM x 24 hrs/day x 60 min/hr = 33,727 BTUs

Step 4 determine heating energy

0.081 density of air (lb/cu ft) x 0.240 heat capacity of air (BTU/lb °F) x 2914 HDD (°F day) x 0.6 CFM x 24 hrs/day x 60 min/hr = 48,944 BTUs

Step 5 determine cooling utility used cool air

33,727 BTUs / 15 SEER (BTU/W hr) / 1,000 W/kW = 2.2 kWh per year

Step 6 determine heating utility used heat air

48,944 BTUs / 8.2 HSPF (BTU/W hr) / 1,000 W/kW = 6.0 kWh per year

Step 7 determine cooling savings

2.2 kWh x $0.118 = $0.27 per year

Step 8 determine heating savings

6.0 kWh x $0.118 = $0.70 per year

Step 9 determine total savings

2.2 kWh cooling + 6.0 kWh heating = 8.2 kWh total savings per year

$0.27 cooling + $0.70 heating = $0.97 total savings per year

8.2 kWh x 15 = 123.3 kWh lifetime savings

$0.97 x 15 = $14.54 lifetime savings

Savings calculations are presented as an example of potential savings; actual savings may vary based on use, utility rates and other factors.
Calculations are based on national averages and assumptions and may be adjusted for a more accurate estimate of individual savings.
While EnergyEarth strives to provide the most accurate information, we cannot guarantee the savings displayed.