No. of Bedrooms
No. of Bathrooms
No. of Radiators
Boiler  Size
1 - 2
1
10
24 - 27 kW
2 - 3
1
15
28 - 34 kW
4 +
2
28
35 - 42 kW
No. of Bedrooms
No. of Bathrooms
No. of Radiators
Boiler  Size
1 - 2
1
0 - 10
9 - 18 kW
2 - 3
2 - 3
10 +
28 - 34 kW
4 +
3 +
20 +
35 - 42 kW
No. of Bedrooms
No. of Bathrooms
No. of Radiators
Boiler  Size
1 - 3
1
10
12 - 15 kW
3 - 4
1 - 2
15
18 - 24 kW
4 +
2 +
28
30 kW +