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The Hotline Newsletter

Summer 2009

CAMBRIDGE COMPARATIVE BUILDING STUDIES


Cambridge conducts onsite building studies at no cost for qualified facilities using other types of heating systems. These are compared to similar buildings with a Cambridge Blow-Thru heating system. Comparable building studies, along with heat load calculations and in some cases energy modeling by a consultant, are used to predict the energy savings from installing a more efficient Cambridge heating system. The following examples show the potential energy savings and impact on our environment if buildings from 50,000 to 1.3 million square feet replace their current heating system with higher efficiency Blow-Thru Space® Heaters.

Building
with other type of
heating system
Comparable building with Cambridge
Blow-Thru heating system
Potential
energy
savings
with new
Blow-Thru
heaters
Equivalent
Environmental
Impact
50,000 ft² - Boat Storage

50%

Less energy used per ft²
of floor space

136

trees
planted
each year
8

Cars
off the
road


37’ high, R-22 Roof/R-15 Walls
Unit Heater System

  • (8) Unit Heaters
  • Suspended from ceiling
  • Ceiling fans required
  • 2,000 MBH Total
  • No ventilation with outside air

boat storage blow thru heater
37’ high, R-22 Roof/R-15 Walls
Cambridge Heating System

  • (2) Blow-Thru Space Heaters
  • Outdoor Vertical Wall Mounting
  • No Ceiling Fans Required
  • 1,350 MBH Total
  • 7,000 CFM Total
100,000 ft² - Warehouse Buildings

41%

Less energy used per ft²
of floor space

227

trees
planted
each year
14

Cars
off the
road


28' high, R-15 Roof/R-12 Walls
Infrared (Radiant)
Heating System

  • (24) Gas-Fired Infrared
    Tube Heaters
  • Suspended Mounting at 22’
  • 4,200 MBH Total
  • No ventilation with
    outside air


27' high, R-15 Roof/R-12 Walls
Cambridge Heating System

  • (2) Blow-Thru Space Heaters
  • Thru-Wall Mounting
  • 2,912 MBH Total
  • 13,880 CFM Total
200,000 ft² - Distribution Centers

66%

Less energy used per ft²
of floor space

1156

trees
planted
each year
71

Cars
off the
road


27' high, R-19 Roof/R-10 Walls
Air Turnover System
(Air Rotation)

  • (2) Large Air Turnover Heaters
  • Floor Mounting
  • 6,250 MBH Total
  • 200,000 CFM Total
  • 40 HP Total - continuous


30’ high, R-19 Roof/R-11 Walls
Cambridge Heating System

  • (3) Blow-Thru Space Heaters
  • Thru-Wall Mounting
  • 3,615 MBH Total
  • 20,820 CFM Total
  • 15 HP Total - intermittent
400,000 ft² - Distribution Centers

36%

Less energy used per ft²
of floor space

643

trees
planted
each year
39

Cars
off the
road


35' high, R-14 Roof/R-10 Walls
Recirculation Heating System

  • (4) Direct Gas-Fired Recirculation Air Heaters
  • Rooftop Mounting
  • 5,600 MBH Total
  • 100,000 CFM Total
  • 60 HP Total - continuous


35' high, R-14 Roof/R-10 Walls
Cambridge Heating System

  • (4) Blow-Thru Space Heaters
  • Rooftop Mounting
  • 8,096 MBH Total
  • 40,800 CFM Total
  • 30 HP Total - Intermittent
1.3 million ft² - Distribution Centers

47%

Less energy used per ft²
of floor space

3252

trees
planted
each year
199

Cars
off the
road


27’ high, R-15 Roof/R-12 Walls
Make-Up Air Heating System (100%outside air)

  • (15) Direct Gas-Fired Draw-Thru Make-Up Air Heaters
  • Rooftop Mounting
  • 3,615 MBH Total
  • 30,315 MBH Total
  • 150 HP Total - continuous


36’ high, R-19 Roof/R-10 Walls
Cambridge Heating System

  • (3) Blow-Thru Space Heaters
  • Thru-Wall Mounting
  • 3,615 MBH Total
  • 20,820 CFM Total
  • 15 HP Total - intermittent