Do you absolutely need to use an outside combustion air kit for the fireplace if there is enough ventilation in the house through a cracked open window, or something similar? And if an outside air kit is needed, what is the maximum length of duct that can be used?
1 Answer
Most fireplaces do not require an outside air kit, but your local jurisdiction may require it.
Submitted by:Tyler M. - NFI Master Hearth Professional on September 19, 2019