CellarPro 1800XT HE Cooling Unit (up to 250 cubic feet) mist finish The SP50 Pro specialty cooling airtight cellars The SP50 Pro specialty cooling system unit for small to midsize residential and commercial specialty storage rooms such as wine cellars or art and document preservation is a perfectly paired condensing unit and evaporator section that comes standard with features such as electric heat Members receive a monthly selection of reds and whites chosen by Certified Sommelier Eric Hammer the 1800XT HE drives more airflow and delivers approximately 26% more cooling capacity The fresh air intake must come from outside the wine cellar and cannot be drawn from the cellar space