Hello All! I am getting ready, after some research, to purchase a hotblast wood furnace from Tractor Supply. Yes, Yes I know it is not the best quality, however I am cost conscious, and I think this model will meet my needs. I need some advice, however. 1. I have a 1500 square foot manufactured home on a 14 course high basement. 2. I already have a Dura Vent triple wall chimney installed. 3. I removed some of the bottom insulation from the house and installed floor vents to help circulate heat. 4. I am ready to put in the Furnace. 5. I am not going to tie the furnace into the existing central heat/air supply. 6. I had a smaller stove in there last year (wondercoal), but it did not produce the BTU's I needed. 7. I have ample wood and coal and have a medium level of experience with fires. Questions 1. What kind of duct work do I have to use? Can I use the flex duct? Probably no, right???? 2. Do I have to use a cold air return? 3. What other suggestions to you all have? Thanks for the input.