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Thread: cheap and easy extra pool heat

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    treehouse pool's Avatar
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    cheap and easy extra pool heat

    took a pool noodle, bent into the letter "U" slid a thick contractor grade black trash bag over it, left the ends open, tied it to the side of the pool with a 3' string.
    Water flows in and out of the open end, getting warmed up while trapped inside. Same concept as the DIY hula hoop lily pads...but with less work. made 2 of them in 2 minutes.

    the string keeps it out of the intake suction....and I tied them on the side of the pool that gets the most sun.

    You could stick your hand under the contraptions and feel a temp difference....its not going to heat the whole pool...but they don't hurt anything floating there and will add a little extra warmth when left in for days on end.

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    Re: cheap and easy extra pool heat

    Id like to see a picture of this.
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    treehouse pool's Avatar
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    Re: cheap and easy extra pool heat

    I dont have an account to upload pics to, but there is not much to take a picture of......bend the noodle into the letter U and hold the two ends with one hand....slide it into the open trash bag and then let go of the two ends of the noodle...the noodle will spring back open and be held by the bag....that's it. tie one of the corners of the bag to the side...I tied one of the unopened corners (bottom of the bag) so I wouldn't mess with the water flowing in and out.
    As it floats water will ease in and out of the open end naturally....and the water under it will warm up also.

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    MirellaJoe's Avatar
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    Re: cheap and easy extra pool heat

    hmm i just cant understand but i would love to see pics as also
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    WitchyD's Avatar
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    Re: cheap and easy extra pool heat

    LOVE this idea! I'm totally doing this and I'll post a pic. Those DIY lily pads are cool but they are a lot of work. I've made two and lost steam!

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    WitchyD's Avatar
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    Re: cheap and easy extra pool heat

    Less than 30 mins later:image.jpg
    I modified by tying the ends of the bag together with the string that I attached to the side. ��

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    Re: cheap and easy extra pool heat

    Does the water flow thru the bag or just pass by on top?

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    Re: cheap and easy extra pool heat

    Isn't the bag supposed to be open so water can get in? I admit, I am unsure what forces flow in and out of the bag or at least enough flow to heat the water enough to notice.
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    treehouse pool's Avatar
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    Re: cheap and easy extra pool heat

    that's exactly what I did.....except I left the end open....so the water just eases in and out on its own, my guess is just due to the thermal that is created inside the bag. I suppose you could put a few holes in the "bottom" of the bag to increase flow....but that may cut down on the resultant heat output.

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    treehouse pool's Avatar
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    Re: cheap and easy extra pool heat

    but you know......it is possible that this tied version will work better....the trapped air will be heated by the sun and be transferred to the water below....
    Now I want to make a both versions and toss a thermometer under each one out of curiosity.

    Thanks for posting the pics WitchyD

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    Re: cheap and easy extra pool heat

    If you do post your results. I am curious at what they will do.
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    JasonLion's Avatar
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    Re: cheap and easy extra pool heat

    This will warm the pool a little because it prevent evaporation, but it isn't significantly better at absorbing heat than water. Most of the potential solar heat gets absorbed by the water without the trash bag. A true solar cover would be even better, but then it costs more.
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    treehouse pool's Avatar
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    Re: cheap and easy extra pool heat

    yeah its no solar cover....just a little passive heat from the black bag catching some rays.
    I couldn't find a solar cover when shopping for one so I tossed a few of these in the pool to try and knock the chill off the just filled pool.

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