Interesting topic...I have a "car capsule" that came along with my car when I bought it but have never used it or even given it a second look. I also have a detached garage (my wife calls it Garage Mahal
) and it has it's own furnace system, yet I am concerned about condensation, etc., coming up through the concrete floor. Being in Canada we have a longer winter storage period. The garage was built in the 70's so I seriously doubt anyone worried about sealing it while pouring the floor. I had thought about getting a large rubber mat to park over...but the car capsule might be the perfect solution!
Thanks for bringing this up and reminding me I have one!