Damper Manufacturer - West Virginia

Changing Recirculation Systems to Cambridge HTHV Space Heaters
Retrofit Case Study

Building Specifications 

  • 163,555 ft2
  • Building height -  24’
  • Metal w/ 1” insulation in walls
  • Metal w/ 3” insulation in roof
  • Over 40 year old building
  • Located in Fairmont, WV

Before - Direct Fired Recirculation System

Performance

  • Uneven temperatures
  • High operating cost
  • Cold dock areas
  • High maintenance cost

Operating Costs

$0.96/ft2 Gas cost @ $1.00/therm
$0.16/ft2 Electric cost @ $0.08/kWh

$1.12/ft2 Total cost 

After - Cambridge Space Heaters

Performance

  • More even temperatures
  • Lower operating cost
  • Warmer dock areas
  • Lower maintenance cost

Operating Costs

$0.62/ft2 Gas cost @ $1.00/therm
$0.03/ft2 Electric cost @ $0.08/kWh

$0.65/ft2 Total cost

Summary

The Cambridge system used 42% less total energy. The Cambridge system saved approximately $77,000/year operating at $0.65ft2  vs. $1.12/ft2