Poorly designed ductwork - need opinions!
I have a fifth wheel with a heating problem. The duct feeding my bedroom is basically made of a sheet of 1/2" foam board taped across two aluminum floor joists. Both ends are capped off with foam bo...
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If you install an adjustable grill or otherwise reduce the size of the existing duct and reduce airflow, make sure you don't reduce it enough that the furnace shuts down via the thermal cut off because the furnace got too hot.
