I want to give credit when credit is due. too many people these days only complain about products and arent grateful for the ones that are good. Let me bend your ears for a minute. Last year we bough a large (9k sq ft) unconventional metal house. it was previously being heated by 2- 1k gallon propane tanks. I couldnt fathom that bill from the propane company. SO, growing up on firewood, 3 houses later with firewood heat, naturally i started to look for the best option. I know different strokes for different folks, and water boil wasnt for us. We are in north georgia and people in the south dont make any woodstoves that are serious duty.I ended up driving over 2700 miles in three days with a rental truck, driving 60 miles from canada to minnesota. After weeks** of studying and learning, we bought a lightly used Charmaster wood furnace. We got it home, installed, ran duct, etc. The wood we used for the first part of last year was quite a mixture of extremely dry wood from many different type trees of low quality. The stove performed ok, but was making a lot of ash and was going through wood like sh!t through a goose. When we ran out in early january, i started cutting dead standing good oak trees. Here is where it was a life changing experience. This stove, by design, is HONESTLY, NO B.S., FREAKING AWESOME! simple, no powered draft, heating piece of industrial machinery! I am jones-ing to crank it this year! Our windows are single pane, paper thin garbage, yet the furnace will cook you out! From being able to use our existing thermostat, only needing a simple 110v supply, power out heat, basement capable, emergency heat relief, etc, its beyond impressive. Call me out if you want to come check it out in north georgia. This is NOT a paid review!! You just need to post when things are this good. the furnace now makes near ZERO ash and burns minimal dry /semi dry oak wood. Consider me a VERY very very happy owner. If you are deciding to save a pile of money on heat and go the wood furnace route, I highly recommend you look very hard at charmasters stoves. If you want any info about mine, pm me.