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david_cary_gw

Correction for coverage of window on Man J

david_cary
12 years ago

So I was looking over a man J calc. They have all my W facing windows with the same multiplier. 3 of the windows are facing a covered porch - like 12 feet deep just a foot above the windows. I don't feel like I ever get direct sun on these windows and they act more like a North facing window from a cooling standpoint. They wind up being the same btu/hr/sqft as uncovered windows which clearly isn't right.

Is there a way of correcting this that I don't see? These windows add up to 5000 btu/hr despite being low-e.

There are just so many ways to fudge manual J's. Does anyone know about what a 10 sqft West facing low-e window (shgc of .3) equals in btu/hr in NC?

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