Having had time to think about it, I honestly have to wonder if Chuck will actually die in the house fire. That may be his intent, but to burn to death is probably the most painful way to go outside of torture, and I find it hard to believe that he'll be able to just stay inside and burn without trying to get the hell out of the fire - getting out of/away from flames is an instinctive reaction, not something you decide to do or not do. If he had the willpower to sit there and burn to death, then wouldn't he also have the willpower to ignore his perceived suffering from electromagnetic fields? Besides, there are so many other ways that he could commit suicide without having to endure that agony.
I may be way off base with this - it is fiction after all. It's just that the more I think about it, the less it makes sense to me.