I am looking to purchase a new inside wood furnace, either a Fire Chief or a Hot Blast and was looking for advice on which is a better furnace. Any help would be appreciated? Thanks.
I have a firechief going on its fourth season. Dont be sold on the "thermostatically controlled" aspect of this furnace. In theory, it may work, but in real life its basically useless. It runs like most wood burners do. I tried using a thermostat in the beginning but it didnt take long to figure out it doesnt matter what the thermostat says the furnace is always blowing warm air as long as you have a decent fire. There is no way of shutting down the furnaces plenum fan by a thermostat. This is the job of the limit switch on the side of the furnace. And if the furnace is hot, the fan is designed to operate for two reasons. First, to keep the furnace from getting too hot, and second, to provide hot air to the ductwork.
It is true that the thermostat will start the draft fan if the low temp setting is reached, but again you dont want this to happen. When the draft fan kicks in, the fire in the furnace roars into life. And it wont stop running until the desired home temp is reached. This desired room temp could take a long period of time to reach, depending on how your home/hvac, is setup. The problem is the fire inside the furnace turns into a raging inferno, and gets WAY to hot for safety reasons.
So basically, if you operate it like a woodstove you will be the one in control of the furnace, not a thermostat. And this to me, it the safer option. Just fill it with wood, the plenum fan will kick in when the furnace is hot, and it will stop when it cools down. And when the house gets too hot, welcome to wood burning.
I will admit its not the most wood friendly unit on the market. If epa wood furnaces were available when I built my home, I'd opt for one over a regular furnace. Most wood furnaces are created equal and are known for their appetite for wood.
The three speed plenum fan on the firechief seems to be larger and moves more air than many other models on the market. Also the 12" circular duct on the top of the furnace is larger than some models with only a 8" duct opening. As far a secondary burns on wood furnaces go, unless you have a epa furnace, dont count on a secondary burn. Even though they have a secondary burn chamber.
Good luck in choosing.