Gas and Oil Home Heating Furnaces - Size of combustion air vent for furnace
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rmogford
07-10-02, 11:47 AM
I have a residential furnace and hot water heat that I am going to be enclosing. I plan to make an opening to a crawl space (that is vented to the outside) for combustion air. How large should I make the combusion air opening?
PDF
07-10-02, 12:45 PM
BTU value of both units.PDF
rmogford
07-10-02, 01:13 PM
I don't know right away and this would take some research. The water heater is a standard residental 40-50 gallon unit and the is furnace for a two BR house in northern CA.