Works great in a crawl space, nice digital control will a long cord that actually comes out from under the building to outside my crawl space door so that I can read and control it outside, drain line goes into a pump to pump the water out from under the house. reduced humidity within 1 hour, after one day got the wetness from under my house all dry, energy saving unit, runs on 110 volts, size of the unit fits very well in my crawl space. I used the hanging option so that it doesn't sit directly on the ground. Not much assembly, unit was packaged well for shipping and came within a few days.