Cambridge Space Heaters

Operating Costs
Based on 3,103 Heating Degree Days @ 50°
$0.14/ft² Gas cost @ $1.00/therm
$0.01/ft² Electric cost @ $0.08/kWh

$0.15/ft² Total cost

Building Specifications

• 54,000 ft² x 37’ high
• R-22 Roof / R-15 Walls
• Located near Detroit, MI

Heating System

• (2) Cambridge Space Heaters
• 1350 MBH total
• 7,000 CFM total
• 4 HP total - intermittent
• No Ceiling Fans

*± 5° indoor temperature variation from 50° setpoint

Unit Heaters 

Operating Costs

Based on 3,524 Heating Degree Days @ 50°
$0.29/ft² Gas cost @ $1.00/therm
$0.01/ft² Electric cost @ $0.08/kWh

$0.30/ft² Total cost

Building Specifications

• 50,400 ft² x 37’ high
• R-22 Roof / R-15 Walls
• Located near Chicago, IL

Heating System

• (8) Unit Heaters
• 2000 MBH total 
• No outside air
• 3 HP total - intermittent
• With Ceiling Fans 

*± 6° indoor temperature variation from 50° setpoint

Summary

The Cambridge system used 50% less total energy with less temperature fall off. If the 370,000 ft² facility had installed a Cambridge HTHV system they could have saved approximately $8,000/year operating at $0.15/ft² vs. $0.30/ft².