Pellet Boilers ... for your living room ... with central pellet storage anywhere in the house

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The models FW32 & FW45 are free-standing Hydronic Wood Pellet Heaters designed and well suited for Low Energy Home or Passivhaus. Both models have have a 15/85 heat distribution ratio. This means that only 15% of the rated heat output is radiated into the room where the unit is installed and around 85% of the rated heat output goes to the water.

Specifications: The overall Heat Output is between 28,000 BTU/hour and 38,000 BTU/hour to the water and only between 4,000 and 6,000 BTU/hour radiation/convection into the room. Perfect in combination with a Solar Hot Water system and 100 to 200 gallon storage tank.

    Model FW32 Model FW45
Rated Heat Input BTU/Hr 34,210 47,340
Max Pellet Capacity Lbs 82  
Min-Max Pellet Size mm Diameter 4-10, Length 5-40
Glass Area door Inches 10 x 12
Firebox Volume CF NA
Rated Overall Heat Output BTU/Hr 32,500 44,500
Heat to water BTU/Hr 28,175 37,550
Efficiency to water % 87 87
Heat into the room BTU/Hr 4,335 5,780
Efficiency to the room % 13 13
Overall efficiency (HHV) % 89 89
Overall efficiency (LHV) % 95 94
Burn Time Hrs Continuous Continuous
Water Flow GPM 5 5
Max. Water Temp. F 140 140
Min. Water Temp. F 180 180
Combustion concept Staged combustion
Particulate Emission rate gr/Hr 0.45 0.45
Particulate Emission Factor gr/kg 0.35 0.35
Particulate Emissions Level Lb/MMBTU 0.012 0.012
CO ppm 50 50
CO2 % 12 12
O2 % 10 10
Max. Stack Temp. F 220 220
Water Capacity Gallons 5  
Maximum Operating Temperature F 180  
Maximum Operating Pressure PSI 30  
Test Pressure PSI 75
Height Inches 48
Depth Inches 27
Width Inches 21.5
Weight Lbs 485
Flue Collar Inches 4
Built & Tested to the following Standards UL391, CAN/CSA B366.1 and UL 1482
*Models FW32 & FW45 meet the EPA Hydronic Heater Program Phase II particulate emission level of max. 18 gr/hour. Models FW32 & FW45 can NOT be qualified to the EPA Hydronic Heater Program because thess models can not be operated at a burn rate for Category II.


For installation schematics and user manuals, please e-mail us.