Wood-Fired Hot Tub Performance Calculator Software :: Borst Engineering & Construction LLC

Wood-Fired Hot Tub Performance Calculator - Borst Engineering & Construction LLC

Fill Rate (GPM)
Initial Water Temp (Deg. F)
Final Water Temp (Deg. F)
Water Volume (Gallons)
Heater Power (BTU/Hour)
Heater Efficiency (%)
BTU Value of Wood (BTU/Lb, 6880 for Douglas Fir with 20% moisture content)
Electricity Cost (Dollars per Kwh)
Hydrogen Peroxide Strength (%, 12, 25, 30 or 35% are typical)


Fill Time (Hours & Minutes)
Heating Time (Hours & Minutes)
Heating Rate (Deg. F per Hour)
Heating Energy Required (Kwh)
Wood Required (Pounds)
Electricity Cost Saved (Dollars)
Hydrogen Peroxide Initial Dosage (Ounces)
Hydrogen Peroxide Weekly Maintenance Dosage (Ounces)
Hydrogen Peroxide "After Bathing" Dosage (Ounces)