Originally Posted by paxye
Originally Posted by lornaschinske
We kept our heaters. The front is still hooked up "normally". The rear heat exchanger/12vDC fans we pulled, drained, shortened & reconnected the hoses to each other to maintain flow. We acquired a small vintage 6 gallon LP RV water heater (dirt cheap), added a Camco "hot rod" to it and installed it. It will heat pet safe anti freeze (either with LP or with AC) that will flow thru the heat exchanger that is now mounted under the bus behind the rear axle with a air return hole cut into the floor. The heat will be ducted to the various "rooms" in the bus using PVC pipe. The ducts will also spill heated air into the insulated water bays to help keep the tanks from freezing. We have a small Dynaglo LP heater (one made to use inside) hanging on the wall in the bathroom area. We will add an LP heater in the fireplace mantle in the front salon as well.
I am trying to picture this and I just can't!! Do you have any link to images or schematics that explain it? I am visual so I find it really hard when just reading it like that....
Only pics I have posted are here
The rear heat exchanger was bolted to the bottom of one of the seats (the only seat we kept because we didn't have time to remove the heat system). I don't seem to have any pics up (somewhere I have them) but we cut the hoses, drained the coolant into a bucket, looped the hose back onto it self to make the circuit complete again, then removed the heat exchanger and the attached fans from the bottom of the seat, cut the hole in the floor for the "return" air (the now cooled down warm air gets pulled thru a regular home furnace air filter and pushed back the the radiator fins of the heat exchanger by the attached fans) and discovered that the heat exchanger setup would hang nicely between the center beams that run the length of the bus (how nice was that!). David hung it, drilled new holes and bolted it into place. It's still hanging under the bus (only 150 miles later). Our goal is to get it hooked up once the weather starts cooling off. We've got the old water heater in place (did that before we left), I bought the hot fluid pump online and tested it. Bought & installed the electric heating element, rebuilt the ignitor for the LP. All we need to do now is run pvc pipe for ductwork, install floor ducts, run the PEX (bought) and buy all the little golden fitting$$$$ to make the fluid circuit. It is simply a very basic hydronic heating system. I had bounced the idea around in my head but didn't broach it to David until I found an article where someone had did the same thing. They used a small car radiator (heat exchanger), fan, el Cid pump and RV water heater to build a small set up. By reusing the rear heat exchanger, that gave us the fans already on the unit and we had acquired a very old RV water heater when we bought some other RV stuff from an old RV being parted out. All I had to buy was a hot fluid circulating pump (could not use one of the potable water pumps we already had due to the high temps being pumped). The article had disappeared from the internet again. It was called "A Simple RV Hydronic Heating System by Jim Phypers (Fri, 29 Jul 2011 11:26:34 | Water Electrolyzers http://www.panorooma.com/water-electrol ... ystem.html
*1991 Jim Phypers) I have it copied down as a PDF on my computer. I hqave learned to do that after losing so much info because I believed the "once it's on the internet, it 's there forever". Unless it's something I need to find.
Like the Poop Sheets which have returned on a couple other sites.
Here is a link to the text
and here is the main image
you would need
Clear as mud! I guess that would make it "Transparent".
If you don't want the expense of an RV water heater, you can also use a small 6 gallon point of use electric water heater. It depends on how you use your bus in cold weather and if you have a non electric back up heat for time when the power goes out (we do).