I think a email to heatmaster would give the most acurrate anwsers. There are a lot of "I think".
I would like to add, if burning wood on new models voided a warranty I would not buy a new c250. If it didn't effect the warranty and was just not suppose to, I wouldn't care but that's my outlaw attitude. I'll email heatmaster myself and get back with you all.
Also like to add to the people that say the president doesn't reall have much power I say, they nominate judicial judges, choose attorney generals-head law enforcement officers and most importantly to me they choose lead officials of the EPA. In our current case of our Obama appointment liberal EPA, the crazy regulations have me laid off from my good job at a steel mill, over 100 other people in my town laid off from local bearing making factory with average wage $22/Hr cause there bread and butter is railcars bearings, and no coal equals less railcars hauling, and also it's been 4-5 years ago but the aep power plant in my county closed down and has recently been demo'd, cause they couldn't afford the EPA upgrades in the short amount of time they were given to do it. The liberal EPA, that same people that down all of this to my little county are the same making crazy regs about wood burners. Commie nazis I say.
Let's bite the bullets tomorrow and vote trump to keep the lifelong coruption of clintons out, and lighten up the EPA regs and get people back to work and get some of our freedoms back.
And hey I voted Rand Paul all the way. So for u Gary Johnson voters , don't waste a vote, plz. He just can't win. If we want a libertarian wait till next cycle and get behind Rand or someone that could win. I'm no big trump fan but imma do what I can to keep Killary out of the whitehouse