In order to attain the ideal storage conditions in a wine cellar, flawless application of the insulation layers plus a purpose-built wine cellar air-conditioner is a must. One should not forget that conventional air conditioners are designed for human comfort and they cannot attain ideal storage conditions for wine. The purpose-built wine cellar air-conditioners are designed to drop the temperature inside a wine cellar as low as 8˚ C when needed, and to keep the temperature stable. They are also designed not to create any vibrations and to keep the relative humidity at the desired level.