Smart Heating Calculator
Trusted One Source Solution for Portable Climate Equipment
Heater Calculator
Select heater type, enter your known load or calculate from airflow and temperature rise.
Derates combustion/electric output at elevation (configurable).
Used for context; not in core calc.
Typical indirect-fired efficiency 80–88%.
BTU/hr ≈ 1.08 × CFM × ΔT (air at sea level).
Assumptions: BTU/hr ≈ 1.08 × CFM × ΔT (sea level). Altitude & efficiency corrections applied to select nominal size. Budgetary results.
Your Heater Recommendations
Three rounded sizes to align with common rental/stock units.
Enter inputs and click Calculate to see recommendations.