[Mikendebbie]

I did about 10 minutes worth of “research” on the topic this morning and I stand corrected! They do make the self contained insulated units for gas fireplaces that will work for you. It looks like you will need to install a vent to the outside - whether you go thru the roof or the sidewall, and use non-combustible material to trim out the rough opening. Pay attention to the weight of the insert unit as you do your search. A few that I looked at were in the 500 lbs range. Hopefully one of the slide experts on the forum can advise on weight ratings of the slides.