What is the easiest and most cost effective way of using steam to heat a small room (say 5m x 3m) in order to maintain a temperature in the region of 15 – 22C?
It is first necessary to calculate the nominal heat loss from the room. Although proper heat loss calculations should always be carried out, in the absence of these figures, we can apply rule of thumb figures to give us a rough idea. To maintain a temperature of about 20C we can apply the following estimates of heat required per unit volume. Typically, for buildings less than 3000 m, use 30 to 40 W/m ; buildings over 3000 m, use 15 to 30 W/m. For smaller domestic type buildings a figure of 40 to 60 W/m would be more appropriate. The room has an area of 15 m, no height is quoted, but let’s assume 4 m, giving a volume of 60 m. If we use a nominal factor of 50 W/m, the heating load is 3 kW. As you ask for the cheapest and most cost effective way to heat this room, we assume that a high degree of temperature control is not required and the room is not used for any critical activity. Both easy and cost effective is to fit a small steam convector heater with a manual damper output and supply
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