Approximate size 23 3/4 high x 13 1/8 wide x 8 1/4 deep. Designed to be wall mounted with steam hose running to the steam nozzle (NOT INCLUDED). Steam nozzle is typically mounted in the side of a duct. Steam is then injected into the duct work and the existing air handler blows the steam into the conditioned space. Unit requires 120 volt 1 phase power. Output of 15.8 gallons of water per day. The nozzle and hose kit must be ordered seperately. Order DMNKIT Duct Mount Kit for this purpose.