Don't waste your money on useless pool insulation! I tested it all, and it SHOCKED me!

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Here I tested the most common pool insulation methods and the result was mind-blowing.
All containers are shielded with paper on the side so all containers have the same amount of sun shining into the containers.
1. Insulated under and on the sides
2. Insulated only under
3. Insulated only on the sides
4. Only a thin plastic lid
5. No insulation at all

You can get all my plans here!

Chapters
0:00 Where does the heat go?
0:42 What is the most cost-effective insulation?
2:09 The 8-hour insulation test
3:16 The surprising conclusion
5:10 A full day after the test, what's going on?

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We have done some similar testing...however with 2 containers buried in the ground and both with a cover. One box with 5 cm sprayfoam insulation, the other one without insulation. To keep the water at 28°C, the non-insulated box needed 60% (!!) more energy to keep its temperature level (during the night). So insulating the swimming pool is usefull, as long as there is a cover as well. It's the same with home insulation, there's no use of insulating your roof if your windows are wide open.

Fomicom

It would be interesting to see the result if they were below ground pools. Also, insulation + cover.

bevanclark

Poly tunnel is a very cheap way to have a whole pool cover paired with a solar cover, which ensures you keep even more heat in

TheHeatingheroes

Part 2. All with lids, and instead of foam on bottom, try the bubble insulation on bottom with foam sides. Another with bubble on sides and bottom.

jessi

the blue insulation tiles under my intex pool are making a big difference .
if i put 1 or 2 solar bubble foils on top at night it helps even more to keep the temperature!
but if you cover the top completely the water starts to stink!
water with chlorine produces chlorine gasses and they need to escape

zpjeiqn

Awesome thank you so much!!! Such an incredibly helpful and informative video!!! You just saved me a fortune on unnecessary insulation

saitdesigns

Thanks for the video. I was contemplating insulating my pool? Interesting test. We have an above ground pool and a heat pump …and a clear solar blanket. The blanket allows sunlight to penetrate somewhat…but isn’t on if the kids are in the pool. I think I would be better off with a blanket that retains more heat versus the one that allows sun light to go through it.

jimbujold

At first, I thought, what an interesting test. I'm just thinking about insulation of above ground pool. But in the end, when I realized that only one box is with lid, it turned into useless comparison.
Well, not completely, it confirmed a good cover is necessary. And of course, warmer water is on the top and without aything the energy loss is realy huge and not even comparable to what goes away thru any wall - every plastic wall is form of insulation. The graph with all having a lid would really show what everybody wants to know.
This comparison is like five people exercising various ways to loose weight and the sixth goes to liposuction. Conclusion - don't waste your time on sport. :)

blazejsutovsky

The Pirani gauge predicts that 99.7 percent of energy is lost by convection.

A cool molecule is heated by the pool surface then it rises allowing another cool molecule to contact the surface become heated and move away.

This a very effective method of cooling.

If you were to repeat the experiment with 2 lids or three lids you could calculate the effect of evaporation vs convection.

kevingooley

Makes sense since heat rises. We have a black pool cover with a clear bubble wrap style on top of that both very cheap.

logothaironsides

interesting test! I was right for this specific test. It would be interesting to see the results again but with metal walls like a lot of above ground pools have. but also a comparison with insulated walls and a cover.

RagnarokLoW

Yeah I would love to see another experiment with dirt insulation and concrete insulation bucket in addition to what you have. And with all lids on every one. And with different thickness and material of covers. It’s a worthy experiment

nicholasmaione

I 'think' this is all to do with latent heat barrier issue. In your boxes, the insulation is touching the 'pool' walls so the heat passes through. Ideally (from my understanding) you want the insulation close to the pool walls but not touching so the heat cannot pass through. You need to create a latent heat barrier where the heat leaks out into a restricted area. If sealed properly, once that void of space has heated up then that is when you will minimize heat loss, but having the escaped heat being reflected back towards the pool wall and not able to escape elsewhere.

benfel

The test is not accurate since sun is heating the containers that doesn't get shadowed by the insolation.

VooDoo_swe

Have you tested the Clear cover versus a White or Dark one? I'm assuming that the light coming through is what is helping the water to stay warmer (versus just preventing evaporation)? Also, long term, will a Clear cover that is UV rated be required versus plain plastic that will Yellow over time?

earld