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Eco Spa

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bachman:

--- Quote from: Aquaholic on November 05, 2018, 06:36:02 pm ---No lid yet - it’s on the ‘to make’ list! I put a sheet of ply over the tub for the test. Coming into winter here so it’s got a challenge on its hands. Planning to plumb in a wood burning water heater to assist with the heating.

--- End quote ---

Sounds like a fun pre winter project. Where are you located as per seasonal temps ?

We've got our first spa and have it going about a week now. It's has a nice thick cover (we are in Colorado) but on a budget, you may be able to fabricate something that is insulated and get you by for a while. Maybe a tarp type material with insulfoam sheathing or something. Sandwich it in there and anchor it down so it won't blow off.

Aquaholic:
I’m in the U.K. On a budget myself, hence the wood burning option. Hoping it’ll heat the tub up in a couple of hours. Will post some results here once it’s running.

Aquaholic:
Update - I’ve built a wood fired water heater from a gas cylinder with copper tube coils installed at the top. Utilising the drain outlet tap, I have taken a water feed to a small central heating pump which circulates the water through the heater coils and back into the main tub through a spout (a bit crude but it’s only for test purpose at this stage!)

I fired up the heater at 9am yesterday and the water was 14C. With the fire running low on a number of occasions during the day the water had reached 30C within 13 hours. Left without heat overnight the temperature has dropped to 27C. Not too bad considering there’s only a makeshift cover and no insulation on the water pipes.

Fire relit hoping we’ll reach optimum temperature to use the tub tonight.

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