My Dad recently purchased a gas fireplace from Specialty Gas. He was treated wonderfully. The owner knows his stuff! He can install and troubleshoot anything. I know because he also helped my husband when we were having trouble with our heat pump one HOT summer! The store features a "Showroom" of all the different models of stoves he sells. Freestanding gas and wood stoves, as well as built in models.
I would highly recommend this quality business for any and all of your heating and cooling needs.