Masonry Heater Performance Calculator Software :: Masonry Heater Design Calculator

Masonry Heater Performance Calculator - Borst Engineering & Construction LLC

Amount of Wood Burned per Day (Lbs)
BTU Value of Wood (BTU/Lb, 6880 for Douglas Fir with 20% moisture content)
Heater Overall Efficiency (%, 55-79 typical)
Indoor Temp (Degrees F, 68 typical)
Initial Facing Temp (Degrees F, 68 typical)
Firebox Door Area (SF, 3.5 typical)
Facing Area (SF, 100 typical)
Facing Thickness (Inches, 5 typical)
Facing Density (Lbs/CF, 150 typical)
Facing Thermal Conductivity (BTU-Inch/H-SF-Deg F, 14 typical)
Facing Specific Heat Capacity (BTU/LB-Deg F, 0.2 is typical)
Facing Emissivity (%, 85-95 typical)
Facing Convection Heat Transfer Coefficient (BTU/H-SF-Deg F, Still Air is 1.56)


Total Heat Gain (BTU/Day)
Average Heat Gain (BTU/Hour)
Maximum Heat Gain (BTU/Hour)
Facing Volumetric Heat Capacity (BTU/CF-Deg F)
Facing Thermal Diffusivity (SF/Hour)
Facing Maximum Surface Temp (Degrees F)
Time of Facing Maximum Surface Temp & Maximum Heat Gain (Hours after Firing)
Heat Gain at 30 Minutes (BTU/Hour)
Heat Gain at 1 Hour (BTU/Hour)
Heat Gain at 2 Hours (BTU/Hour)
Heat Gain at 4 Hours (BTU/Hour)
Heat Gain at 6 Hours (BTU/Hour)
Heat Gain at 8 Hours (BTU/Hour)
Heat Gain at 10 Hours (BTU/Hour)
Heat Gain at 12 Hours (BTU/Hour)
Heat Gain at 14 Hours (BTU/Hour)
Heat Gain at 16 Hours (BTU/Hour)
Heat Gain at 18 Hours (BTU/Hour)
Heat Gain at 20 Hours (BTU/Hour)
Heat Gain at 22 Hours (BTU/Hour)
Heat Gain at 24 Hours (BTU/Hour)
Heat Gain at 36 Hours (BTU/Hour)
Heat Gain at 48 Hours (BTU/Hour)
Facing Surface Temp at 30 Minutes (Degrees F)
Facing Surface Temp at 1 Hour (Degrees F)
Facing Surface Temp at 2 Hours (Degrees F)
Facing Surface Temp at 4 Hours (Degrees F)
Facing Surface Temp at 6 Hours (Degrees F)
Facing Surface Temp at 8 Hours (Degrees F)
Facing Surface Temp at 10 Hours (Degrees F)
Facing Surface Temp at 12 Hours (Degrees F)
Facing Surface Temp at 14 Hours (Degrees F)
Facing Surface Temp at 16 Hours (Degrees F)
Facing Surface Temp at 18 Hours (Degrees F)
Facing Surface Temp at 20 Hours (Degrees F)
Facing Surface Temp at 22 Hours (Degrees F)
Facing Surface Temp at 24 Hours (Degrees F)
Facing Surface Temp at 36 Hours (Degrees F)
Facing Surface Temp at 48 Hours (Degrees F)

Borst Engineering & Construction LLC