We have a lot of family that heat with wood, regular fireplaces, inserts, stoves and one with an 1890's cast behemoth with a copper boiler on the back. For some folks that have a 'smoke' type alergy, and I know one, it might not matter what you burn or how you burn it. She gets near a combusting fire inside a home and sneezes, eyes water, and if shes there long enough gets the coughs. Allergies really do suck.