Enviro makes solid stoves. They are conventional secondary tube design and well made. Their Boston line of freestanding stoves are like the PE Alderleas and Jotul F45/50/55. That is a fine steel stove with a cast iron jacket. Other good stove lines are Quadrafire, Country (Lennox), Kuma, Hampton (Regency deluxe), Osburn, Napoleon.I'm not trying to know anything more than my distibutor can supply me with, which is Enviro. Problems with these...obviously they aren't going to tell what the problems are. Maybe we can start there.