In England a figure of  25 Watts per m3 is usually used for this calculation. We prefer to use a figure of  30 Watts assumed for Scotland  to allow for climatic variations!. If a very well insulated property 25 watts should be ok even in Scotland.

Above assume  reasonable  levels  insulation in walls and roof

Room Length (m) x Room width(m) x Room Height (m) =  m3

m3  x Watts per m3 =  Power requirement

e.g. Living Room  3.6m x 4.5m x 2.4m =38.88m3

38.88m3 x 30 Watts per m3 = 1166watts  

Total  infrared panels  wattage for room  should add up to the above figure (or more)

IF IN DOUBT PLEASE CHECK WITH US

Rapid Reckoner!

Available Heater sizes Max  room volume ( based 30 Watts per m3)

230W     8m3

330W   11m3

500W   17m3

660W   22m3

800W   27m3

1000W 33m3

1300W 43m3

IF IN DOUBT GO OVER! MORE POWER THAN REQUIRED WILL

JUST CAUSE HEATER TO HEAT QUICKER AND CUT OUT QUICKER!

It is important to ensure you have the right size of heater for your room. If you under power a room this can lead to inefficiency,feeling cold  and increased costs, as the heater tries to get the room up to the  required temperature but can't, so the heater stays on all the time. If in doubt it is always better to have a little too much power as all that will happen is the room heats up quicker and cuts out quicker.

The information opposite should enable you to accurately assess your needs, but if you are in any doubt please get in touch and we will be pleased to help out.

How to calculate the power requirement for Far Infrared heaters