12.29 crack coefficient x 3 ft x .01^.67 inches of water = 1.7 CFM without weatherization

2.765 crack coefficient x 3 ft x .01^.67 inches of water = 0.4 CFM with weatherization

Step 2 determine savings

1.7 CFM without weatherization - 0.4 CFM with weatherization = 1.3 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 1.3 CFM x 24 hrs/day x 60 min/hr = 73,074 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 1.3 CFM x 24 hrs/day x 60 min/hr = 106,045 BTUs

Step 5 determine cooling utility used cool air

73,074 BTUs / 15 SEER (BTU/W hr) / 1,000 W/kW = 4.9 kWh per year

Step 6 determine heating utility used heat air

106,045 BTUs / 8.2 HSPF (BTU/W hr) / 1,000 W/kW = 12.9 kWh per year

Step 7 determine cooling savings

4.9 kWh x $0.118 = $0.57 per year

Step 8 determine heating savings

12.9 kWh x $0.118 = $1.53 per year

Step 9 determine total savings

4.9 kWh cooling + 12.9 kWh heating = 17.8 kWh total savings per year

$0.57 cooling + $1.53 heating = $2.10 total savings per year

17.8 kWh x 15 = 267.1 kWh lifetime savings

$2.10 x 15 = $31.51 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.