Underfloor Heating Heat Output Tables

Solid Floor Heat Output – 15mm and 18mm Pipe
Room Temperature Pipe Spacing(mm) Flow Temp(oC) Output(W/m sq) Floor Temp(oC)
18oC 100 40 59 24
45 75 25
50 92 26
55 109 28
200 40 48 23
45 62 24
50 75 25
55 89 26
300 (18mm pipe only) 40 39 22
45 50 23
50 62 24
55 73 25
21oC 100 40 48 26
45 65 27
50 82 29
55 99 30
200 40 40 25
45 54 26
50 67 27
55 81 28
300 (18mm pipe only) 40 32 24
45 44 25
50 55 26
55 66 27
100 40 45 26
45 62 28
50 79 29
55 95 31
200 40 37 26
45 51 27
50 65 28
55 78 29
300 (18mm pipe only) 40 30 25
45 41 26
50 53 27
55 64 28
Suspended and Floating Floor Heat Output – 15mm and 18mm Pipe
Room Temperature Pipe Spacing(mm) Flow Temp(oC) Output(W/m sq) Floor Temp(oC)
18oC 300 40 34 21
45 44 22
50 53 23
55 63 24
60 72 25
21oC 300 40 28 24
45 38 25
50 47 26
55 57 26
60 67 27
22oC 300 40 26 25
45 36 26
50 45 26
55 55 27
60 65 28

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