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Old 04-15-2020, 06:31 PM
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Pete VanderLaan Pete VanderLaan is offline
The Old Gaffer
 
Join Date: Apr 2002
Location: Chocorua New Hampshire
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Insulate the hood, which will have an exhaust system built into it. Insulating the unit is a complete waste of time and material.

The furnace radiates heat, OK that's what it does. Contain the readiation, exhaust the heat from combustion. That helps a lot since it actually contains the radiant heat to a degree, BUT IT"S RADIATION. IT"S NOT ENTIRELY CONVECTIVE. Understand that. Pull cool air under the hood and your misery will be reduced.

This is fifty years telling you this.
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