HRV replacement

Old 05-10-22, 08:14 AM
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HRV replacement

Hi everyone. I need to replace my old air exchanger that was installed in 1990 and has 4" ducting. Can anyone tell me if I am able to reduce the 5 inch ports, which all the new ones seem to have, to attach to the old 4" duct work. Thanks
Old 05-10-22, 10:53 AM
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Welcome to the forums.

That would be a question for the manufacturer as it could affect operating performance.

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