Hi milnerpt, I used a 1/2 shoe box sized electric heater years ago and promptly saw a $50+ dollar increase in our electric bill (and I didn't even use it that much). Gave the thing away after that. Don't know if the halogen heaters are so "power hungry" tho.

As for the humidity, it seems that some newer garages aren't quite ventilated like they used to be. The garage on our 2004 house was "fully finished" (i.e. sheet rocked, textured, and painted when we bought it) and, as such, doesn't have as much ventilation as our previous houses/condos. This, of course, has led to more humidity and dampness than I'd like.

Anyway, I've been looking into several dehumidifier options and it seems that A/C powered types are know for using a fair amount of energy as well as producing quite a bit of heat. This led me to look into various "passive" (non electric) dehumidifier designs that are, more or less, based on absorbent materials. However, these DH types must be allowed to "dry out" periodically By placing the unit in the sun or in a drier area for a day or so.

Unfortunately, I still haven't decided on what, if any, type of dehumidifier to use.

HTH