I have 42 inches zero clearance wood burning fireplace and after a few hours, the house will get a sewer smell. Had plumbing checked, and it's good. Plumbers thought is the fireplace is pulling all the inside air and I should get a fresh air return added to the bottom of the fireplace. Is this correct?
Yes, at first glance it would seem a fresh/outside air connection to the fireplace is your best possible solution. Such a kit would be a model-specific part, so you need to identify the manufacturer and model information to find the appropriate kit.
Tyler M. - NFI Master Hearth Professional
on December 9, 2019