Radiant Floor Heating Calculator
Design hydronic radiant floor heating systems with proper loop sizing.
Radiant Output Table
| Floor Temp | Room 65F | Room 70F | Room 72F |
|---|---|---|---|
| 80F | 30 BTU | 20 BTU | 16 BTU |
| 85F | 40 BTU | 30 BTU | 26 BTU |
| 90F | 50 BTU | 40 BTU | 36 BTU |
| 95F | 60 BTU | 50 BTU | 46 BTU |
BTU/hr per sq ft output
Design Guidelines
Max Floor Temp: 85F occupied, 90F unoccupied
Typical Spacing: 9" for most applications
Max Loop: 300ft for 1/2", 400ft for 5/8"
Flow: 0.5-1.5 GPM per loop typical