The thought behind the passive solar heater is to reduce our utility bills and have something to assist with heating our cabin.
We started out with two Korean war era wood foot lockers. the dimensions were 16" wide, 32", and 8" deep. We began by removing the lids which had been secured well with rivets which had to be drilled out.
|Removing the well secured lids|
We began by forming the ducting into tubes. We then attached the flexible dryer duct to one end of one tube, formed a U shape and connected to the tubing beside it. At the opposite end of the middle tube, we used three tubes to fit the size of our box, we repeated the process by attaching the vent to the tube, made another U shape to attach the middle piece to the last duct. We made sure all of the hose clamps were all tight.
|Forming the layout for the ducting|
|Drilling the air inlets|
In order to keep the entering cold air from escaping the tubing I built a box in the corner around the cold air
inlet and cut the wood on one side to slide over the ducting. Use clamps until the glue has dried.
|Add Silicone to seal any leaks|
We cleaned out the sawdust from the boxes and then painted the interior of the solar heater with a couple of coats of black paint. We then attached a thermometer on the inside of both boxes near the hot air outlet. Once the paint was dry we laid out the ducting and put a nice sized line of liquid nails along the entire network of ducting. The ducting was then placed inside the box with the glued side down. The cold air inlet box was then put in position and clamped until the glue was dried. It is important to note the box's top came up to the level of the bottom of the pane of glass. After the glue had dried all of the ducting was painted flat black and once dry a second coat was applied ensuring all surfaces were covered.
Once all the glue had cured and paint dried we placed a bead of silicone caulking along the 2X2" strip of wood along the inside of the box and the glass was carefully laid in place. We then repeated the caulking on the top outer edge of the glass to ensure it was airtight.
|Carefully place glass onto the lip inside the box|
|The finished project|
This type of heating device would be ideal in a bug out situation and you don't have to expend energy gathering fuel and there is no smoke to reveal your location