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