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Posts Tagged ‘diy camper heater’

PostHeaderIcon Added Homemade Wood Stove Water Boiler Heating System To The Off Grid Camper

Today I completed my fireplace water boiler heating system for the off grid camper. The wood stove heats up water, which is routed through PEX tubing to a car heater core. A homemade heater blower box pushes heat through the camper.

Below you can see my antique fireplace with the water fittings hooked up to it. It has a built in water boiler around the burning chamber. If you do not have a built in water heater, you can make one. By placing a closed container of water on top of the wood stove and attaching water fittings, you can get the same result. Or you can make a water boiler that hangs on the side of the fireplace. The form and shape of your particular wood stove will affect where you place the water boiler. Some people drill holes into the side of the fireplace itself and put an expensive commercial stainless steel water heat exchanger right inside the fireplace. You can also use copper coils around the chimney pipe to get the same results.

Heating my trailer home with a DIY wood stove boiler system

The wood stove alone heats up the camper ok, but the floor is normally quite cold. By using a car heater core as a radiator heat exchanger and the original duct work in the camper to push heat through, the floor can also be heated up even in the furthest room from the stove. The wood stove has a built in water boiler, which was connected using pipe fittings to bring the water away from the hot sides of the fireplace. Then PEX tubing was used to carry the hot water to the original heater box in the middle of the camper. The trailer came with no heater, so this area was empty. By building a new heater blower box around the car heater core, the heat can be conducted to the bedroom and bathroom floors where it is needed the most.

Below you can see the car heater core being assembled into a homemade heater blower box for my DIY camper heating system.

Auto Heater Core Used For A Trailer Radiator Heater

Below you can see the finished heater blower box. Plywood was used to make a box that perfectly fit the car heater core. Then the original duct work from the camper was attached on one side of the box and a computer fan on the other side to blow the heat throughout the camper.

DIY RV / Camper Heater Blower Box

Just for info, to keep this project fully off grid, only battery operated power tools were used in the construction of the homemade heater system. Here is a photo of my battery powered jig saw. (Of course, there is no other power available anyway out there).

Off grid battery powered tools used to upgrade off grid camper

PEX tubing was used to connect the fireplace water fittings to the car heater core. The PEX tubing was routed through the camper where the original heater duct brought heat from the propane heater in the middle of the camper to the living room. Since there is now a fireplace in the living room, that duct will no longer be needed. The PEX tubing passes underneath the dining room benches and table area, and into the original heater compartment of the camper.

Connecting DIY Trailer Home Water Heating System

The original RV heater was about 18 inches cubed and now there is a lot of space freed up for storage. The new heater blower unit goes underneath that where the wiring of the original propane heater went.

The new heater blower box was assembled into the small space underneath the original heater compartment and the original duct work that went to the bathroom and bedroom areas were attached to the new blower unit. Also there is a tube that blows heat into the fresh water storage tank to keep it from freezing. This will now allow me to have fresh water without the fear of freezing. Soon there will be an end to living out of one gallon jugs of water for washing and drinking.

In the image above you can see the storage space underneath the dining room bench seat. This is where the PEX tubing was attached to rubber car radiator hoses, which are connected to the car heater core, off to the right, inside the cabinet. In the foreground of the image you can see the duct that goes underneath the floor to the fresh water storage tank. This was later connected to the new blower box.

Time to get some more firewood cut and see how this new homemade water boiler system works in the off grid camper.

Check out our homepage for more do it yourself projects: The Do It Yourself World

PostHeaderIcon Passive Solar Window Heater For My Off Grid Camper

I recently made a passive solar window heater for my off grid camper. You can find the details here: Passive Solar Window Heater. It is simply a sheet of styrofoam with aluminum foil on one side, painted black. There are vent holes in the top and bottom to allow air to flow. The heater is kept away from the window about an inch to allow free air flow from top to bottom.

Heating camper with solar heater

On really sunny days this solar heater puts out so much heat that you can feel the hot air flowing out the top of the heater. On partly sunny days it still works though. Enough to keep the inside of the camper above freezing on very cold days. One day when I tested it, the temperature outside was 30 degrees F and inside it was 65. This morning it was 7 degrees F outside and in the camper it was about 30 degrees at 10 am. I have not been heating the camper for a few days while working on other projects in the house. I find these results impressive considering the fact that the only heat in the camper for days now has been the passive solar window heater and the temperatures are above freezing in the day. And also the fact that the living room and bathroom are both missing most of the insulation in the ceiling while I repair water damage.

Later in the day today it got up to about 30 degrees outside and 45 inside with no other heat source.

I will soon be installing another passive solar heater on the bathroom window, which faces south – south west. I will use an outdoor version which rests on the window sill and draws air from the interior of the camper, heats it up and then passes it back inside the camper through the window.


Another project I am working on is a passive solar heater under the floor of the camper. I have been putting skirting around the camper outside to help keep the heat inside during the cold nights. On the south side I am using some salvaged window frames and some old black roofing materials I found. I will post details when it is done.