What is the difference between vented and vent-free appliances?
Vented units’ by-products must be exhausted outdoors. The most common type is a vented log set in an existing fireplace. In this application, you would be interested mainly in aesthetics, some heat. The flue must be used in exactly the same way as burning wood (completely open during burns.) Vent-free products do not require venting at the source, but rather need adequate ventilation to the living space. These clean burning appliances give you better than 99% return on the heat produced.
