It's not possible to build a garage the right way

[moo7e]

Do you need a separate dehumidifier? Doesn't the air source heat pump handle dehumidification?

Yes, my air source heat pump did not handle dehumidification well.

 

[Ossian K Olsson]

Do you need a separate dehumidifier? Doesn't a heat pump handle dehumidification?

If you choose a heat pump that doesn't dehumidify, you can complement it with a small FTX system like the PAX EOS 100 to circulate the air in the garage year-round.

Garages are complex environments and many older houses where cars were parked actually have fewer moisture problems along the walls, for example.

 

[Josth]

Do you need a separate dehumidifier? Doesn't a heat pump manage dehumidification?

A heat pump cools the air when it dehumidifies. You hardly want to cool down the garage more in the winter...

 

[Johan Larsson9794]

If you choose an air-source heat pump that does not dehumidify, you can complement it with a small FTX system like the PAX EOS 100 to get air circulation in the garage year-round.

Garages are complicated environments, and many older houses where the car was parked actually have fewer moisture problems along the walls, for example.

But then maybe it's best with FTX that has a built-in heating element?

 

[Josth]

FTX with heating elements is like direct electric heating, i.e., an expensive way to heat the house. A danger with FTX if you're not careful. It's significantly better for the heat to come from a heat pump.

 

[Ossian K Olsson]

But then maybe it's best with FTX which has a built-in heating element?

Yes, you have to calculate that. A built-in heating element (such as PAX eos 100 at 400 w) is direct-acting electricity which thus consumes a lot of power. In other words, I guess that an air source heat pump pays for itself quite quickly.

If you have other heating in the garage like water-borne heating, it might be different.

 

[Oldboy]

Do you need a separate dehumidifier? Doesn't a heat pump handle dehumidification?

A heat pump can either heat or dehumidify, but it can never do both things at the same time. Additionally, I think it's safe to say that a product built for a specific purpose is significantly better and more efficient. That is, a dehumidifier is most likely better at dehumidification than an LLVP set to dehumidification mode.

 

[växelventil]

But it should work with an air-to-air since in a garage the layout is quite open and the air can circulate quite well, so there shouldn't be any major risk of mold. So it should keep the humidity down with an air-to-air.

 

[Dilato]

A sorption dehumidifier like this both heats the air and dehumidifies at the same time.
https://www.k-rauta.se/produkt/luft...ge-ab-sorption-echodry-combi-ii/7350054590044

 

[Josth]

If you build the garage with water and sewage and with wetroom standard to be able to wash the car, a powerful dehumidification unit is needed, such as this one: https://woods.se/sv/shop/avfuktare/woods-sw59fw-made-in-sweden/ to ensure everything is dry by the next day. As mentioned, these both dehumidify and heat, so it will be extra warm in the garage by the following day.

 

[Hodie]

We are soon going to pour the foundation for a new house and have some considerations regarding drainage/channel/drain. The conditions are a double garage of just under 50 sqm, integrated into the main building, as well insulated as the rest of the house (with two somewhat insulated garage doors), and with underfloor heating embedded in the slab. We aim to keep it as cold as 16-18 degrees Celsius during winter.

I'm considering whether to have 1) a channel between the two parking spaces with a slope from the side walls towards the channel, 2) two channels; one channel under each parking space with a flat floor between the cars but a localized slope under the cars or 3) a flat floor throughout the garage but a centrally located traditional square/round drain with a localized slope only around the drain. Or option 4) that I might not have even thought of..?

 

[FredrikR]

We will soon pour the slab for a new house and have some questions regarding drainage/trench/drain. The conditions are a double garage of just under 50 sqm, integrated into the main building, as well insulated as the rest of the house (with two reasonably insulated garage doors) and with underfloor heating embedded in the slab. Aiming to keep it as cold as 16-18 degrees Celsius during wintertime.

I'm considering whether to have 1) a trench between the two parking spaces with a slope from the side walls inwards toward the trench, 2) two trenches; one trench under each parking space with a flat floor between the cars but a local slope under the cars, or 3) a flat floor in the entire garage but a centrally placed traditional square/round drain with a local slope only around the drain. Or option 4), which I may not have even thought of..?

I have a drain in the middle between the two parking spaces and would probably prefer a trench under each car with a local slope if I ever build a new garage.