Why not buy a cheap microwave bypass the door switch and leave it running in the garage, this will warm it. ...... What could go wrong ?
According to my phone weather it is 100% humidity. Looking like I will be wiping them down tomorrow morning.[emoji29]
You might as well put out several trays of salt to absorb the moisture. It will not remove your problem, but like the machine above, will help. There is insufficient capability of this machine to absorb the amount of water vapour in air for the volume in your garage. At least with salt, you can bake it in the oven to dry it out to use again.
BASED ON A SEALED ROOM! Room size x room height = cubic metres. ( so assuming 2.5 m tall = 75 cubic metres or 2648.6 cubic feet. To do four air changes an hour, you'd need one that can do 300 cubic metres/hour ( or 10594.4 cubic feet per hour). That's about 176 cubic feet per minute. Then you need to to calculate how much water you need to remove, in pints per day. For a very damp room, that will start with at least 12 pints for 500 cubic feet, and go up by five pints for each extra 500 cubic feet. Based on the volume of your room you'll need to pull about 35 pints a day. That's just under 20 litres. As soon as you open a door or window, the "sealed room" is broken, and basically the air becomes laden with moisture again almost immediately, taking you back to the start.
Joking aside please ensure that the humidifier is capable of working at low temperatures, many aren't. In trade a chemical (can work in freezing conditions ) version is around £400.
Most say +5℃. What happens if you run below that? Will it break or just not be able to clear moisture?
In my concrete shed with tiles on I keep the window open all year around to stop condensation I have my tumbler in there and my bicycle which has never been used has no rust either (plus other stuff tyres a mower hedge trimmers ) It rarely gets moisture on anything Could you keep your window slightly open?
That's a good point. If you cant eliminate condensation the key to reducing the effects is ventilation. If you're getting damp air into a building and you haven't insulated the walls to stop it condensing you've either got to remove it with dehumidifiers or vent it away.
I have had a couple of small Windows in the mid latch so air can get in/out but won't be a lot of movement as they are behind roller blinds. Left it all closed last night, will check later.