Gas and Oil Home Heating Furnaces - choosing furnace and designing vents

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maxslomoff
04-23-06, 11:11 PM
is this a big question or what?

i'm just wondering what goes into choosing a furnace, other than square footage

and after that what goes into designing the duct work?

i'm just looking for basic explanations, no need to sweat.

thanks,
max


Jay11J
04-24-06, 06:20 AM
The #1 thing for a good furnace is a good install.

A good dealer should be able to do a manual J (System sizing), and a manual D (Duct sizing). As long they do a good job on that, a furnace will do it's job.

maxslomoff
04-24-06, 11:34 AM
how do they calculate the manual d and manual j?