These systems are the most economical and easiest to install. They are designed to mount between the studs of an existing wall, and they do not require a licensed HVAC/R installation technician. One end of the system blows cool air in to the cellar, and the other end absorbs heat from the cellar and exhausts the heat into an area adjacent to the cellar. Self-contained units will make more noise than a split or ducted system.
The Split System is often the most efficient way to cool a cellar. Cooling unit condensers are typically noisy and require significant space for ventilation, in most cases the cellar location does not include an area for these functions. By splitting the cooling system, the condenser can be placed in a space better suited for heat and noise dissipation while the quiet evaporator is inside, or near, the cellar. A licensed HVAC/R technician is required for the installation.
A ducted system has more installation options than a self-contained system. The unit may be installed up to 25 ducted feet from the cellar, with the cool air flowing to the cellar and the heat exhaust ducted to the outside of the home. Ducting is also a more aesthetic choice for wine collectors who do not want to see a cooling unit in the cellar. Noise from the unit will be reduced or eliminated, depending on the installation.