Whisperkool Self-Contained Wine Cooling Systems are the most economical and easiest to install between the studs of an existing wall. They are designed for easy installation without the need for a certified HVAC/R installation technician. One end of the system blows cool air into the cellar, and the other end absorbs heat from the cellar and exhausts the heat into an area adjacent to the cellar. Self-Contained Wine Cooling Units will make more noise than a split or ducted system.