Literally how my Aunt in alaska made a hottub. Submersed wood stove with a barrier in a huge old industrial barrel. Takes about two hours to heat up and seats about eight.
Thats actually not a terrible idea, and if it gets tipped over its not like anything would catch fire. Just keep to the edges of the pool and you're golden
@PunnyBaker, the pool is plastic you’ll ruin that before the water runs out
@PunnyBaker, wouldnt it just start boiling the water after a bit?
@PunnyBaker, Nice crispy golden.
A small water circulator would keep the temp pretty consistent.
Step 1: Get a wood pellet stove
Step 2: Make flue pipe wind back and forth under the water then pop up and put a small fan in the exhaust. Make an air inlet for the front.
Step 3: Submerge in pool.
Step 4: Heat pool, invite friends, loved ones and crushes over.
Step 5: Profit.
Could make a combustion chamber underwater, lose way less heat to the air, but getting a feed tube would be a much bigger undertaking than sticking a wheelbarrow in the pool