Building a dehumidifier

[xav0049]

and if I took the air in an unheated room or at least colder and I use the temperature difference to create condensation .... I would have cost only the ventilaurs

and I could re-inject this air into the same room so no air entering very cold and transfer calories from one room to another in the building

maybe we should build a prototype to judge

[Christophe]

Well done, you have just reinvented the VMC double flow ventilation !!

In this case and given the size of the room as much to install a ready-made one at 1000-2000 € rather than embarking on a hazardous DIY that will cost you several hundred euros in materials anyway?

Otherwise the small dehumidifier which is said not to resist chlorine is (again) a good dimension of the dehumidification sellers at the swimming pool ... and even if that posed a problem: it would take years to deteriorate an ebac quality dehu (the mine exchanger is all stainless steel, no trace of rust for 5 years).

The chlorine concentration in the air remains moderate, nothing to do with water: a heat exchanger for swimming pools must be made of titanium if chlorine or salt electrolysis is used ...

[chatelot16]

double-flow ventilation is a good solution: we extract humid air by recovering heat, and we bring in dry air

1st advantage: the double flux exchangers are almost all made of plastic so they will resist chlorine well

2nd advantage: it evacuates the chore and all the pigs which are produced indirectly ... a dehumidification in closed circuit would have been a disaster

the very humid air to evacuate contains more energy than the same flow of dry air coming from the outside, so a good VMC double flow will easily give dry and clean air at a temperature almost equal to the air evacuated

but beware this excess energy coming out with humidity means that the simple double flow solution will cost more energy than dehumidification by refrigeration machine

but there is no hesitation: ventilation is essential, to avoid the danger of chore

see also the shape of the room where the pool is located: we would have to find a way for the CMV to directly suck in the wettest air without letting it mix with the rest of the room: curtains or a well-placed transparent partition: suction of the air above the pool, reinjection of dry air opposite the pool

[BobFuck]

So, is humidity annoying when you bathe (open pool) or all the time?

To cover the pool, you can use PIR insulating panels for underfloor heating.

When you are in it will evaporate. By cons if you use the pool for 1 hour a day and cover it the rest of the time with waterproof insulation (PIR or PE bubble, not polystyrene), well, during the 23 hours when it is covered, it s will not evaporate, so you decrease your evaporation by 24

If you don't want it to condense on the walls, the walls must be warmer than the dew point, as the humidity will be 100%, the walls must be warmer than the air, so insulate by interior and cover the walls and ceiling with a material with the lowest possible thermal inertia. Once this is done, raising the air temperature to 37 ° C is very fast since it only heats the air and very little the walls. And when we leave it cools as quickly. So we only heat when there is a need.

The idea of ​​the dehumidifier is messy, or only to dry the room when it is not in use, and the basin closed without evaporation.

[Christophe]

+1 bob ...

The idea of ​​the dehumidifier is messy, or only to dry the room when it is not in use, and the basin closed without evaporation.

Ah finally, some crappy anti-commercial "common sense"!

Yes and in this case, a little 400 € dishu will suffice ...

[xav0049]

as this basin will work little .... about 12 h / week I will already cover and see the humidity that will remain the rest of the time ..........

maybe then a small portable dehu will be enough then it will be a simpler solution without work or big warning

in any case thank you all for your help

[Christophe]

Yes that's what I think too ... but insulation of the room would not be luxury (at least the coldest walls)

In any case, please let us know about the results ...

[BobFuck]

The first thing to do is to cover the pool, there is a type, I don't know if it's on this site or not, who has a kind of jacuzzi / mini pool heated at home and who covers it with PIR tiles to put on the heated floors, he says it works very well.

[hic]

A thermal shock dehumidifier
Without energy in Autoconstruction
does not exist on the web. The subject is to be initiated!

While it is the solution of comfort and economy in summer as in winter, before the humidity reaches 65%.

Could we start with the easy version,
that of winter allowing a thermal shock at 0 °? Guaranteed effect!
The summer version is just one more problem to solve.

So one thing after another please

[Christophe]

What do you say hic?