500,000 Input BTU
Easy to Maintain - Firelake's three-pass heater models are easy to maintain with clean-out panels on both ends of the heat exchanger. Designed for a maximum heat transfer with 100% steel corrosion resistant fire chamber and heat exchanger.

Parts Manual

SPECIFICATIONS:

Input (approx. BTU/hr.) - 500,000 (126,000 Kcal)
Output (approx. BTU/hr.) -  400,000 (100,800 Kcal)
Stack size 10" - ( 25.4 cm )
Shipping Weight  0 927lbs. (421 kg.)
Heater dimensions (L x W x H)
  Includes outside measurements of fan and burner  52.31" x 69.5" x 34" 
   (132 x 177 x 86 cm)
Electrical requirements - (maximum circuit protection) 220 vac ,30 amp
Approx. fuel consumption - 3.6 GPH (13.63 liter/hour)
Blower CFM  - 5800 (164 cubic meter/minute)
Outlet Air Temperature - 170 F (77 C)
Compressed air requirements - 2 CFM @ 40 PSI / .057 m3/min.@.28Mpa
Agency listings
Patents UL, C-UL
5,950,616
Fuels Crankcase oil, transmission and hydraulic fluids, as well as other petroleum-based lubricants (any weight combinations up to SAE 50 as well as #1 and #2 fuel oil.) fuel oil.)
Oil transfer pump 18 GPH @ 35 PSI (68 LPH @ .24 Mpa)