THE BUILDING
The age of the building, its size, number of external walls, and the quality of its insulation (if it has any) all affect efficiency of any heating system.
Just like any heating system, there are a number of important factors that need to be taken in to account to ensure the best performance of heating systems.
These include:
ROOM SIZE
If you get a radiator that is too small, you’ll struggle to get your room warm enough and if you get a radiator that is too big, you’ll waste money.
INSULATION LEVELS
If insulation values are very high then heat loss will be minimal and the radiator will reach the desired temperature sooner, which means it will consume less electricity and consequently be cheaper to run.
LOCATION
The climate and subsequent heating demands will vary depending on where you are in the country.
LIFESTYLE
A young working couple may have different heating requirements compared with a retired couple.
SEASONS
All heating systems will work harder in winter compared with the British summer due to lower temperatures.
To ensure the correct heating system is selected for a specific environment, calculating the Watts required is essential.
This is achieved by multiplying the length by width of the room to attain the number of square metres in a room.
This calculation is valid for ceiling heights below 3 metres. If your room has a ceiling height above 3 metres please
| UK AREA | NOT INSULATED – NORTH | NOT INSULATED – SOUTH | NORMAL INSULATION – NORTH | NORMAL INSULATION – SOUTH |
| ZONE A – RED | 100 | 95 | 90 | 80 |
| ZONE B – YELLOW | 105 | 100 | 95 | 85 |
| ZONE C – LIGHT BLUE | 110 | 105 | 100 | 90 |
| ZONE D – DARK BLUE | 115 | 110 | 110 | 95 |
For rooms with ceiling heights up to 3 metres
Example: 5 metres x 3 metres = 15 sq metres
Total sq metres = 15 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 for 4 metres and above please contact us for calculations.
| UP TO 3M HEIGHT | 3M TO 3.5M HEIGHT | ||
| MODEL | WATTS | MAX SQ M ROOM | MAX SQ M ROOM |
| RC 4 TT | 500 | 5 | 4.31 |
| RC 6 TT | 750 | 7.5 | 6.47 |
| RC 8 TT | 1000 | 10 | 8.62 |
| RC 10 TT | 1250 | 12.5 | 10.78 |
| RC 12 TT | 1500 | 15 | 12.93 |
N.B. These calculations should be considered as ‘average‘ depending on climate zone, building fabrication and insulation quality.
