Newly built cold garage, mold trap?

[nutchuk]

Hello

I have almost finished building the cold garage, which is about 50m2.
When I was thinking about ventilation, I found that cold garages often have problems with mold and rust due to high humidity.

So now my question is how to address this. We currently have a Woods SW38FW dehumidifier running in the house (to dry out construction moisture).
This can go down to +2.
The question is whether dehumidification is needed at sub-zero temperatures, and whether it's better to run the regular dehumidifier during the summer/fall/spring instead.
The alternative is a sorption dehumidifier, which costs more.

Does anyone have any tips for keeping mold and rust away?

 

[Düsseldorff]

You don't need dehumidification at such low temperatures.

 

[nutchuk]

You don't need dehumidification at such low temperatures.

I live in southern Norrland, it has been below freezing here since mid-November with a peak at -26. Now it's around -5.

 

[Düsseldorff]

Sorry, I read a bit carelessly and now see that the question was not only about mold but also about rust. For mold to start growing, you need positive temperatures. Between 5-10 degrees, it grows incredibly slowly even with very high humidity, and below 5, it practically doesn't grow at all. As for rust, I am less informed.

 

[klaskarlsson]

Hello

I have almost finished building the cold garage, which is about 50m2.
When I was thinking about ventilation, I realized that cold garages often had problems with mold and rust due to high humidity.

So now my question is how to think about it. We currently have a Woods SW38FW dehumidifier that runs in the house (to dry out construction moisture).
This one goes down to +2
The question is whether dehumidification is needed at sub-zero temperatures and if instead, you should run the usual dehumidifier in the summer/fall/spring.
The alternative is to get a more expensive sorption dehumidifier.

Does anyone have any tips for keeping mold and rust away?

The problems often arise when you drive damp vehicles into the garage, so perhaps you should just start a fan that exhausts the air (and, of course, have a supply air vent on the opposite side) when needed?

I have a cold storage room, with no ventilation except "drafts in the cracks" - nothing rusts or molds in there. But I also don't drive in slush and water on tires, except for the little bit my shoes bring in.

 

[Stefan1972]

It's probably better to have wall vents in strategic places then if it's just a cold garage.