Hey all-I got the call Saturday that my permit is approved for the install of my add-on furnace/chimney so I got to work prepping my basement yesterday. I had to tear out two old poorly built partition walls that the previous owner had put in to divide the oil furnace off from the rest of the basement. Then I got to work on the old basement window, the opening of which can be seen covered with plastic above the wood furnace: View attachment IMG_1503.jpg I'm going to set a thimble in the opening with brick and mortar, and the remaining space will be covered a louvered vent (like a gable vent) to ensure enough outside air. The vent is adjustable so I can restrict the air or close it off completely if needed. As for the chimney itself the pipe coming out of the top of the stove will be single wall black pipe which will transition to a Class A tee rather than an elbow to make the horizontal run through the thimble. The reason for this is that the top of the tee (and the horizontal run of pipe) will end up about 6" below the floor joists because the ceiling is a bit low, so even double wall stove pipe would not be permitted. Since 6" is a little close anyway I am going to install a heat shield to cover the joists over the area where the chimney pipe will pass under. This will simply be a sheet of Hardi-Board attached to the joists using non-conductive 1" spacers to provide an air gap. As you can see, heat loss shouldn't be much of an issue since I was able to locate the add-on so close to the main furnace. I'm a little worried about being able to keep moisture in the house and have looked into a duct mounted steam humidifier as the house gets pretty dry in winter as it is, so any suggestions on that would be welcome. The furnace itself will get a few tweaks as well. After reading about the 28-3500 in various threads I found numerous recommendations regarding mounting the furnace on concrete blocks for easier loading. I'm going to buy four 12" blocks (All I have are 8") to give it an extra boost to make loading those overnight hunks of locust and oak easier on the back. Additionally I am going to mount a switch box on the side of the unit which will serve as a cutoff for the blower so that I can turn it off if need be without unplugging it. Finally, I'm still trying to figure out exactly how I'm going to do it, but I want to install some type of sheet metal housing over the blower itself so that I can direct the air through a standard furnace filter. My wife has bad allergies so I'd rather not be blowing dirty basement air through the house. Off to the side you can see my $5 firewood rack (yard sale) and free (garbage) fire tools, but I have a still have a list of stuff to get since I'm a new woodburner and don't have all of the needed "equipment" yet. The list includes the following: - Smoke detector (There's one near the steps on the other side of the basement, but I'd rather have another one closer) - CO detector (Same as above) - Fire extinguisher - Which is better suited for a wood stove related fire? CO2? Dry chemical? Plain old water? Perhaps I should just install a hose bib down there? - Welding/foundry gloves - Metal ash can - Infrared thermometer Anyway, I'm planning on updating this thread with pictures/comments as I complete the installation so that others installing a 28-3500 (or a similar add-on) can look at it and get ideas or offer suggestions. Either tomorrow or Wednesday night I plan on getting the furnace up on blocks and getting ready to run the chimney through the wall.