CFM Heater Comparison Study

Lower CFM Heaters Burn Less Fuel

CHI Companies brought in our 1,000,000 BTUH direct fired heater and the competitions 1,000,000 BTUH direct fired heater into a third party testing lab. The results showed that a lower CFM heater will use significantly less fuel per season. Heaters that have higher CFM ratings will use from 7% to 35% more fuel for the same BTUH rating.

Heat Comparison Study based on (1) 1,000,000 BTUH Heater

Image of CHI's Rexotherm
Ours Theirs
Cubic Feet Per Minute (CFM) 3,800 6,000
CFM x 60 Minutes 228,000 360,000
CFM x 24 Hours 5,472,000 8,640,000
CFM Per Heating Season (150 Days) 820,800,000 1,296,000,000
Difference In CFM Over Season 475,000,000

The Rexotherm Direct Fired Heater has a higher temperature and lower CFM discharge than any other heater. The Rexotherm heater high temperature discharge gets the building up to the desired temperature quickly and then switches to a low burn cycle until the thermostat calls for heat.This has proven to be not only the most fuel efficient unit (dollars saved), but also the cleanest burning (lowest carbon monoxide).

Heat Loss BuildingThe more CFM of Cold Outside Air a heater pulls into a building, the more cold air needs to be heated, therefore the more you spend on fuel. Also, a larger CFM heater will over pressurize a building. Buildings under constructions have many leak points and a high infiltration. When a building is introduced to a large CFM heat source, the air gets either pushed out all of the existing openings or into the walls. Mold can easily form in the walls and may not be detected for years.

High CFM heaters are excellent for finished buildings, they are extremely inefficient for buildings under construction.

Graphic displaying heat loss from a building's doors, windows, foundation, roof
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