Electric Wiring, 3rd Edition

82 Wiring fixed appliances

room of the same dimensions having small windows. Similarly, a room

having two or three outside walls will require correspondingly more heat than

one with only one outside wall. It is, however, seldom necessary to exceed

50 W/m

3

.

Where convector heaters are used to heat a room, between 35 and

45

W/m

3

of air space is required, depending on local conditions. If, however, the

convector is thermostatically controlled, a slightly better arrangement is to

use a heater with a loading well in excess of the calculated minimum. A room

that is continually being used and is heated by a convector is usually more

economically heate ...