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heat gain

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heat gain [′hēt ‚gān]
(engineering)
The increase of heat within a given space as a result of direct heating by solar radiation and of heat radiated by other sources such as lights, equipment, or people.

heat gain
The net increase in heat within a space.


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There are a couple terms to know: "Solar heat gain coefficient" (SHGC) tells you how much solar energy (and heat) gets through; "visible transmittance" gauges how much light is lost in the balance.
In the Summer it will reduce radiant heat gain into the home and in the Winter it will reduce heat loss by radiation and minimize convective looping.
Loft insulation not only prevents heat from escaping during cold weather, it also helps to prevent heat gain during the summer so your home stays more comfortable year round and saves on heating and cooling expenses.
 
 
 
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