storage help

[GOLDMYN]

just wanted to pass this on. I've used this for many years and I have had very good results. I've made a board which then sits inside my car during the winter

https://www.amazon.com/Goldenrod-72...argid=aud-465161895813:pla-569148756600&psc=1

 

[jason99]

Probably a stupid question, but how does it work without a place to drain water?

 

[BLUPORT]

Probably a stupid question, but how does it work without a place to drain water?

I use the same kind in my gun safe. They're essentially heaters.