Expert: Steve Tavares - 9/13/2009

Question
I'm curious why a firebox has to be specifically listed for use with vent-free logs.  Can a propane log set actually damage a steel lining surrounded by bricks?  There must be more to a manufactured firebox than I realize.  I'd love to put propane logs in my fireplace since the damper is rusted shut and I'd like some heat in a cold room.  Is buying a full insert set (logs in its own surround) the next best option?

Thanks for the help.

Answer
My main expertise in in Canada. But I will answer this in my opinion.

In Canada, where we get very cold temperatures, installing a log set doesn't make sense. In order for the log set to be installed correctly the damper must be open or removed. Which means cold air coming into the home via the chimney when the log set if not on. If a firebox is not approved for a log set then we can't install one because it was never tested/approved with a log set.

Usually log sets burn at 65,000 BTU's or more which is quite a lot of heat. If your in an area that has very cold temperatures, I would say like our winters in Canada (0 Celcius and below) for a few months then Installing a sealed insert will make a large difference in keeping that room comfortable. Having a thermostat with said unit will really allow you to keep that room at the comfort range that you would like.

I hope this helps.