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Calcimator

Radiant Floor Design Calculator

Design hydronic radiant floor heating systems including tube length, flow rate, pump head, and boiler sizing.

Inputs

sq ft
BTU/hr
°F
°F
inches
inches

Results

Total Tube Length

1,333 ft

Required Boiler Output

34,500 BTU/hr

Water Flow Rate3 GPM
Pump Head Required141.8 ft
System Water Volume13.6 gallons
How to Use This Calculator
  1. Enter Floor Area, Heat Loss, and Supply Water Temp.
  2. Set Return Water Temp, Tube Spacing, and Tube Diameter.
  3. Review Total Tube Length (ft) and Required Boiler Output (BTU/hr).
  4. Use Water Flow Rate (GPM) and Pump Head Required (ft) to inform your decision.
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