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Return plenum size
Ramona Pannewitz 28/01/2026 - 11:34 AM
Is an 18 x 8” return plenum large enough for 1200 CFM?
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2 Answers
Joyce Heating Service Ltd
Rating: 4.9 out of 5
Could work but would prefer a minimum 10x20.
Answered28 January 2026
1
Air Heating Plus, Ltd.
Rating: 5 out of 5
I recommended change returne every time you replace new furnace looking better and no problem I recommended 10/24 if you have room
Answered28 January 2026
0