Technical Specifications

10 ft 12 ft 14 ft 16 ft 18 ft 20 ft 25 ft
40,000 BTU 40,000 BTU
40,000 BTU 40,000 BTU 60,000 BTU 60,000 BTU
40,000 BTU 60,000 BTU 60,000 BTU 100,000 BTU 125,000 BTU 150,000 BTU
60,000 BTU 100,000 BTU 100,000 BTU 125,000 BTU 125,000 BTU 150,000 BTU 175,000 BTU
125,000 BTU 150,000 BTU 150,000 BTU 175,000 BTU
175,000 BTU 175,000 BTU
CEILING HEIGHT
500 SQ. FT.
750 SQ. FT.
1,000 SQ. FT.
1,250 SQ.FT.
1,750 SQ.FT
Measure room and determine heater size
2,000 SQ.FT
W
D
H
UP TO
SQUARE
FOOTAGE
(W x D)
Burner Box*
BURNER BOX SKU#
(Ships as Natural Gas
w/Propane
Conversion Kit)
BTU
Top
Horizontal
Reflector
Top
45º
Reflector Sides Below
Mounting
Height
635-0140 40,000 6” 12” 30” 55” 10’-14’
635-0141 60,000 6” 12” 36” 55” 10’-14’
635-0142 80,000 6” 18” 36” 55” 12’-15’
635-0143 100,000 6” 18” 36” 74” 12’-15’
635-0144 125,000 6” 18” 36” 87” 14’-19’
635-0145 150,000 6” 18” 36” 87” 15’-25’
635-0146 175,000 6” 18” 36” 87” 15’-25’
CLEARANCE TO COMBUSTIBLES
STEP 1
HOW TO BUY TUBE HEATERS:
The square footage is calculated on a 40º F temperature rise to outside
temperature. Assumes insulated walls(R-11 or R-13, 4”) & insulated
ceiling (R-38, 12”).
* Damage to paint and interior surfaces can occur if clearances are not followed correctly.
Sizing guide based on input BTU. Output BTU is 89% efficient.
Tube configuration and length