Boat Storage Facility - Michigan and Illinois

Cambridge Space Heaters vs. Unit Heaters
Comparative Case Study

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Cambridge Space HeatersBoat Storage  Comparative Case Study Survey - Cambridge Air Solutions

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.