Cambridge Space Heaters
Operating Costs
Based on 3,369 Heating Degree Days @ 55°
$0.15/ft2 Gas cost @ $1.00/therm
$0.02/ft2 Electric cost @ $0.08/kWh
$0.17/ft2 Total cost
Building Specifications
- 46,000 ft2 x 28’ high
- R-12 Roof / R-11 Walls
- Thermostats @ 55°
- Building unoccupied
Heating System
- (2) Cambridge Space Heaters
- 1800 MBH total
- 7,000 CFM total
- 4 HP total – intermittent
Unit Heaters
Operating Costs
Based on 3,369 Heating Degree Days @ 55°
$0.30/ft2 Gas cost @ $1.00/therm
$0.02/ft2 Electric cost @ $0.08/kWh
$0.32/ft2 Total cost
Building Specifications
- 42,000 ft2 x 28’ high
- R-12 Roof / R-11 Walls
- Thermostats @ 55°
- Building unoccupied
Heating System
- (12) Unit Heaters
- 3000 MBH total
- No outside air
- 4 HP total - intermittent
Summary
The Cambridge system used 47% less total energy. If the 42,000 ft2 facility had installed a Cambridge system they could have saved approximately $6,000/year operating at $0.17/ft2 vs. $0.32ft2.