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Old 11-11-2010, 08:06 PM   #1
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need help with HEIL heating and cooling unit

I have a 3ton HEIL outside unit made in 1994 - model number npahc36ak01. I can't figure out what size duct work to use on the return and intake? anyone have any ideas on what size I should use on these? The return and intake are different sizes. The return I believe is 14inches and the intake (which is an odd shape) is 11inches in height, can't remember the width.

Any help would be great!


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Old 11-12-2010, 01:27 PM   #2
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need help with HEIL heating and cooling unit

I would hook up whatever fits. Is it square or round? Our sheetmetal shop made the transitions, we just installed whatever the salesman said. They made us square to square, square to round, and made the shroud to go between the package and house.

That's a pretty old package...does it still work?


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Old 11-13-2010, 03:49 AM   #3
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need help with HEIL heating and cooling unit

Hey!!! There was a saft recall on that unit. One of the components burst into flames and causes homes to burn down
Just slow, not stupid.
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