I thought that all of the newer manufactured fireplaces had an external air source for combustion. The house today was built in 2005, and did not have an exterior source for the combustion air. The model was a DESA B36, which has an optional external air kit, but the model installed did not have it. Are other inspectors seeing new factory fireplaces without external air. The company rep said that to operate the fireplace the glass doors must be left open. Seems pretty lame to me as far as energy efficiency.

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Jim Robinson
New Mexico, USA