re: Ermagerd - another A/C question - my system is pulling in a lot of outside air...

quote:

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Sounds like you have a leaky supply duct. I'd let it run and shut those doors then go up and start feeling and listening around in the attic.

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I agree. Also, be sure to check around the A/C return duct, but with a negative pressure in the house, I would think the return duct would be ok.

I wonder what his attic temperature is? My guess is that the attic is a little cooler than most houses.

Also, check the outlet air vents in the house. Hold your hand close to it to feel the air flow. If a duck in the attic has a big air leak, that connecting vent will not have much air flow. My guess is a duct going to the kitchen area is blowing out air in the attic.