Answered 13h ago · Author has 513 answers and 1.2m answer views
Engineering, purpose, installation, codes and standards, use
Unvented gas fireplaces are engineered to burn almost perfectly, producing CO2, H2O and heat. They are 99% efficient at converting gas to heat. However, they are not designed to be used as primary heat, and should not be used for more than a few hours a day.
There is a wide range of options with vented fireplaces, and the answer deserves its own space,…