another Albin Vega owner
Well as said Glass reinforced PLASTIC that your boat is made of burns very well. But if you have ever seen a GRP boat that has burnt you will notice the glass art of GRP remains intact and unburnt. It is the resin that burns.
If I were to want a heater (35degrees yesterday) then I would go to a scrap metal yard looking for steel square tubing around 15 by 20 cms and you want about 40 cms of it. Drill and fit steel bars through the body about 10cms from the bottom for a grate. Get a piece of heavy steel to cover the top. Making a filling lid and possible hot plate. You will need a way to keep it cntred and in place and a way to be able to lift it open for filling.
Another lighter steel plate for the bottom with turn up to make an ash tray.
Drill holes around the sides near the bottom for ventilation and make some way of variable covering of the holes to adjust draft. You might be able to find some fireproof glass and cut a hole for a window in the front so you can see the fire.
At the back and top you need to fit a steel water pipe type elbow of around 50mm diameter for a chimney. From there you need a flue either going straight up to the cabin roof or possibly bending to go aft to the bulkhead for an exit.
Mount it low on the floor or against a bulkhead and insulate the boat structure against the heat. It should be good for small wood or charcoal. Depending on how big you make it.
Just a few thoughts but no idea really olewill
I like the idea of using an old gas cylinder. olewill
Wood isn't a practical fuel as the energy density is low, so you need to tow a bunker barge around behind you. Solid fuel can be cosy; I spent December 2006 in Peterhead marina living on a friend's boat, howling arctic gales and snow but the stove kept me warm. Messy though, you need a vacuum cleaner or a lot of patience with a dustpan and brush.