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How to build a wood fired hot tub

Step 15Fill the tub and light it up

Fill the tub and light it up
Fill the tub with fresh or sea water and set a fire in the heater. It took about 4 hours to heat the whole tank so start early.

You also might want to place the heater on a metal tray to catch any ash and hot coals that fall out.

The heat exchange coil will get covered in creosote because it's so much colder than the fire - this is to be expected.

The other thing you can do is make an insulated lid for the tub from the top of the tank and some more corrugated iron.

Enjoy!

Please excuse the camera work - there was a newbie at the helm...

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Author:veloboy(I'm building a strawbale house)