bungalows. Where return-air ducts are not used, the cupboard in which the
unit is installed should have high- and low-level grilles, these usually being
fitted in the doors.
The heating unit
This is essentially a large storage radiator, the main difference being that the
casing contains a highly effective lagging which restricts case emission on the
large models to about
1
kW. The lagging may be permanently attached to the
inside of the heater case or inserted before the heating core is placed in
position. Many different types of insulating material are used for lagging, the
most common being calcium silicate slabs ...
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