Plenum Sizing

Old 08-08-02, 08:57 AM
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Plenum Sizing

How would you size a supply plenum for a Goodman GMNT 60,000 BTU, 3-ton furnance (heat only)?
Old 08-11-02, 06:57 PM
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Lightbulb Simple rule

Make the plenum the same size as the outlet of the furnace, leave it the same size to the end, try to make all the branch ducts the same size/length as each other.

There is a lot of debate on this, everybody has their own ideas of how it should be done.

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