Haverland UK

Not sure which size radiators you need?
Measure the room. You will need to know the length and width of the room as well as the height of the ceiling in metres.

Recommmended performace table (Watts per square metre)

Watts per square metre

For rooms with ceiling heights up to 3 metres
Example: 5 metres x 3 metres = 15 sq metres
Total sq metres = 15 sq metres x 100 watts = 1500 watts
Recommendation: 1 x RC12 TT = 1500 watts

For rooms with ceiling heights from 3 metres to 3.5 metres
Example: 6 metres x 5 metres = 30 sq metres
Ceiling height: 3.5 metres ÷ 3 metres = 1.16
Multiply 30 sq metres x 1.16 = 34.80 sq metres
Total sq metres = 34.80 sq metres x 100 watts = 3,480 watts
Recommendation: 2 x RC12 Compact TTi @ 1800 watts each = 3600 watts

For rooms with ceiling heights of 4 metres and above please contact Haverland UK for calculations.

Up to 3m height

Model Watts Max sq
m room
RC 4 TT 500 5
RC 6 TT 750 7.5
RC 8 TT 1000 10
RC 10 TT 1250 12.5
RC 12 TT 1500 15
RC 14 V 1800 18
RC 8 Compact TTi 1000 10
RC 10 Compact TTi 1500 15
RC 12 Compact TTi 1800 18

3m to 3.5m height

Model Watts Max sq
m room
RC 4 TT 500 4.31
RC 6 TT 750 6.47
RC 8 TT 1000 8.62
RC 10 TT 1250 10.78
RC 12 TT 1500 12.93
RC 14 V 1800 15.51
RC 8 Compact TTi 1000 8.62
RC 10 Compact TTi 1500 12.93
RC 12 Compact TTi 1800 15.51
N.B. These calculations should be considered as ‘average’ depending on climate zone, building fabrication and insulation quality