recessed light cover savings calculations

These calculations display your estimated savings based on assumptions below

For customized calculations enter your own data in the green fields

region



cooling degree days CDD
heating degree days HDD
infiltration through recessed lights CFM
type of heater

Heating Seasonal Performance Factor (HSPF) BTU/(W hr)
Seasonal Energy Efficiency Rating (SEER) BTU/(W hr)
Annual Fuel Utilization Efficiency (AFUE) %
cost per kilowatt hour
cost per therm
cost per CCF
cost per cubic meter
1 CCF = 103,100 BTU = 1.031 therm
1 m3 = 35.31 ft3 = 0.3531 CCF

How your savings are calculated

Step 1 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 6 CFM x 24 hrs/day x 60 min/hr = 337,267 BTUs

Step 2 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 6 CFM x 24 hrs/day x 60 min/hr = 489,440 BTUs

Step 3 determine cooling utility used cool air

337,267 BTUs / 15 SEER (BTU/W hr) / 1,000 W/kW = 22.5 kWh per year

Step 4 determine heating utility used heat air

489,440 BTUs / 8.2 HSPF (BTU/W hr) / 1,000 W/kW = 59.7 kWh per year

Step 5 determine cooling savings

22.5 kWh x $0.118 = $2.65 per year

Step 6 determine heating savings

59.7 kWh x $0.118 = $7.04 per year

Step 7 determine total savings

22.5 kWh cooling + 59.7 kWh heating = 82.2 kWh total savings per year

$2.65 cooling + $7.04 heating = $9.70 total savings per year

82.2 kWh x 15 = 1,232.6 kWh lifetime savings

$9.70 x 15 = $145.44 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.