I have taken over my 3 car garage and am turning it into a workshop. I also store quite a bit of wood in there(12% or less for final acclimation to shop). Never had any rusting problems with machinery or tools, but only heat the shop during the times I'm in there. Will be adding a 220V electric ceiling mount forced air heater soon, now that I have 220 wired. Hopefully on a thermostat. Was thinking of adding a dehumidifier to help keep the air drier. I know quite a few of you use them. Any recommendations on what I should be looking for. The shop is split into a 440 sq. ft area with a wall and door, then about a 220 sq. ft area. Will I need 2 dehumidifiers?