Time for an update. I'm sure some people have been wondering about the progress on my heat battery set-up. I spent most of January messing around with that and finally got it operational this past Friday night. Most of January was very mild so I got by just fine heating with electric heaters and the AquaHot. I needed help for a number of things to do with the development and replacement of the stove so that took some time as well since I was dependent on other peoples' schedules. I've got a few pictures for you.
Here is one of the propane tank being cut. Of course we made doubly sure it was empty of any gas first, lol.
This is what the old barrel stove looked like after it was removed from the heat battery structure. Major heat damage is apparent.
This next picture is of the new tank stove fitted in to place in the battery structure. One of my neighbors owns a bobcat with a bucket so we used it to lift and then lower the stove in to place.
My brother had mentioned that people using a heat battery like this recommend lining the cavity with styrofoam board insulation so I disassembled last years' heat tunnel and used the styrofoam from that.
The next step was to re-engineer and install the ducting. I had to redesign it so as to fit properly into the cavity since the styrofoam lining made the cavity smaller.
Then I filled the cavity up with sand and covered the top of the sand with 2 inch thick styrofoam board. I bought a new thicker (5/8") 4x8 sheet of plywood for the top. I used the old bricks again around the chimney stack to separate the hot stack from the styro and the plywood top. Many people (including me) would have doubts about the styrofoam holding up in that hot battery. So far, so good. The stove has been in full operation since Friday night and I have not seen any smoke from weird places or smelled any burnt plastic odors. Like my brother said--"If it melts, it melts--so what". I suppose. Anyways, the thing is working great so far. It is holding its heat even better than before. I'm running the computer fan duct blower through a programmable timer. I've programmed it to shut the fan off periodically so as to let the heat build back up in the battery. If the duct fan blows long enough and the fire has burnt down long enough then the output temperature will drop somewhat. Not a huge amount but noticeable. By shutting the fan off occasionally you can keep getting max heat output.