Which heaters do I need?

To work out the size of radiator, in kilowatts (kw), needed to heat each room, use the formula number of kw = volume of room x 0.04

Example 1 - Standard room

For a room 3m x 4m x 2.5m high

no. of kw = 1.2kW (3 x 4 x 2.5 x 0.04)

We suggest a SU61/15 or SU61/16


Example 2 - People who feel the cold

If you are elderly or feel the cold, we suggest that you use a figure of 0.045

For a room 4m x 4m x 2.5m high

no. of kw = 1.8kW (4 x 4 x 2.5 x 0.045)

We suggest a SU61/20a, 20b or 20c (depending on available wall space)


Example 3 - North facing outer wall

If a room has a north facing outer wall then increase the result by 25% and use 0.05

For a room 4.5m x 4m x 2.5m high

no. of kw = 2.25kW (4.5 x 4 x 2.5 x 0.05)

We suggest a SU61/25a or 25b (depending on available wall space)

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