the exhaust for the existing fan is only 3 inches in diameter. I don't think the arn80 can exhaust the air fast enough. it would be really hard to put in new duct work.
Thank you for your question. No, you cannot add a more powerful motor to your ARN80 while connected to 3” duct work. The ARN80 requires a minimum of 4” round duct work to operate appropriately. For more information, contact Broan-Nutone Technical Support at 888-336-6151.
Date published: 2018-02-15