Construction & Architecture / Energy & HVAC
Room BTU Calculator
+600 BTU per person
Kitchens need +4000 BTU
BTU Calculation Method
Base Formula: BTU = Length × Width × 20
Apply adjustments for climate, sun exposure, insulation, height, occupants, and kitchen
Multipliers: Climate (0.9-1.15) × Sun (0.9-1.10) × Insulation (0.85-1.20) × (Height / 8)
Additions: +600 BTU per person, +4000 BTU for kitchen
Important:Oversizing can cause short cycling and inefficiency. Undersizing won't cool effectively. Consult an HVAC professional for precise sizing.
Use this room btu calculator to compute energy & hvac results from your inputs.