Original message
| tldoneil
 |  "Design question"
, posted Thu 4 Sep 02:32  
Do all gas furnaces and air handlers have the same size supply and return opens designed into the systems or are they designed around BTu? If they are different are the common sizes? If so where can I find such info
Tim O'Neil
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Replies:
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| sinead26ohara
| "Re(1):Design question" , posted Sun 7 Sep 22:09
The openings are relative to the cfm required for proper air-flow, both in the supply and the return.
Sinead O'Hara
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| tinner73
| "Re(1):Design question" , posted Thu 4 Sep 15:28
you need cut sheets of the equipment.
union trained in Chicago
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| | tldoneil
| "Re(2):Design question" , posted Thu 4 Sep 20:14
I do not want to sound stupid but what do you mean cut sheets?
Does each size require a larger opening based on BTu?
Tim O'Neil
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| | tinner73
| "Re(3):Design question" , posted Thu 4 Sep 21:33
Spec/cut sheets will give every dimension.
union trained in Chicago
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