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I recently had my HVAC sub install several Utility Set RTUs to exhaust bathrooms, laundry and ranges in a multi unit building. I didn't question the spec but the owner asked why we did not just do...

I recently had my HVAC sub install several Utility Set RTUs to exhaust bathrooms, laundry and ranges in a multi unit building. I didn't question the spec but the owner asked why we did not just do...