Below is a list of questions that are most frequently asked by customers from design of the wine cellar to maintaining their Wine Guardian system. If you cannot find the answer to your question below, see our Troubleshooting page for more information.

Product and Options Selection

  • Fill out the heat load calculator on our website. While square footage is a basic guide for determining size, it does not capture all the heat factors for a cellar, such as;

– Glass and lighting – the amount of glass in the wine and lighting in your wine cellar design may cause your cooling unit to run longer.

-Traffic and bottle rotation – how often you are in and out of the cellar may increase the time your cooling unit runs.

-Climate – areas with high ambient temperature will have an effect on your unit and also cause your cooling unit to run longer.

Humidification is critical and often an overlooked feature in a cellar design.  RH% between 50 and 70 is adequate with 60% being ideal. Low humidity will dry out corks and can degrade the wine. At time of construction it is advised to install a vapor barrier around the room, on the outside of the (warm side)  cellar insulation to prevent condensation and potential mold. A cooling unit alone cannot add moisture or humidity cellar air. Read why a vapor barrier is important.  

Air cooled systems use ambient air to remove heat form the condenser, whereas water-cooled systems use liquid drawn from a water source to cool the condenser. Air-cooled systems with the ability to duct the condenser air are ideal as they offer the flexibility to intake air from another part of the structure, or outside where it may fall within the max/min temperature range. A water-cooled option might be of interest for locations near a lake, cooling tower or well, where water is plentiful.  Read more.  

If you live in the north or your cellar is subject to ambient temperatures below 55°F (13°C) we recommend that you purchase a wine cooling system with a heater. A cooling system can do nothing if the cellar temperature falls below the control set point. The best cooling system is one with an integral heater coil and works off the same thermostat.

Low ambient control options are used when the condenser or outside portion of the unit will be exposed to cold outside air temperatures of 40°F (4°C) or lower, for example, if the temperature in the cellar falls below the control set point. The best system is one where the heating is integrated into the cooling unit and works off the same thermostat.  This prevents any overlap where a freestanding heater might be on the same time the cooling unit is cooling.

Installation and Set Up

Supply and return grille locations within a wine cellar are crucial to the proper performance of your wine cellar cooling system. Improperly placed grilles can be one of the major causes of airflow short cycling. Short cycling will occur when the grilles are too close together. The supply and return grilles should be placed at opposite sides of the wine cellar, ideally with the supply grille located in the ceiling and the return down low along the wall. Cold air at the ceiling will mix with the warm air from the cellar that rises, creating an even mix of temperature from top to bottom within the cellar. Properly sized grilles are also important to provide for quiet operation and reduced system static pressure losses.  Read more.

The general length of ductwork should be no more than 25′. If your cellar design requires longer runs it is recommended that you use rigid ductwork and a booster fan. Booster fans can be purchased from big box stores and any HVAC / hardware stores. They are designed to “boost” the air flow through ductwork with long runs, twists and turns.  

Below are instructions for installing a remote sensor or remote interface to a Wine Guardian Through-the-Wall unit so uses that device to measure temperature and humidity instead of the local interface.

  • Press and hold the setting buttons until the screen changes displays 1 F; this is setting 1.setting 10
  • Press and release the settings button until you reach setting 8. It will display 8  0.
  • Use the up arrow key to change the 0 to 12. This is the access code to get beyond setting 8.
  • Press and release the settings button until you reach setting 10. Select the up or down arrow key to change the setting to the correct device as shown in illustration to the right.

Yes, a Wine Guardian remote interface controller can be placed outside the wine room with the use of a remote sensor. Up to three remote sensors can be placed anywhere within the wine cellar for optimal temperature control and humidity readout. The sensors can continuously display these variables to another location outside the wine cellar, and alarms will notify you if your cellar is out of optimal range.


Frequency of cleaning and replacement of the drip pad depends on the inlet water conditions and the cleanliness of the cellar air. It is recommended that you check your humidifier monthly to be sure there’s not a mineral build up on the drip pad which may reduce airflow. Also check for vibration or unusual noises which may indicate trapped debris.  Click here for further instructions on cleaning and replacing the drip pad or refer to your Wine Guardian Operations and Maintenance Manual.

Follow the maintenance schedules below to prolong the life of your Wine Guardian system and keep it running efficiently.

Ducted and Split system maintenance schedule.

Through-the-Wall maintenance schedule.

Geothermal Applications
  • Wine Guardian water-cooled features and benefits
Product Profile: Wine Guardian’s low ambient protection and heater option
  • How to know if you need Low Ambient Protection
  • Determining if you need a Wine Guardian Heater
Supply and return grilles
  • Improper location of grilles one of major causes of airflow short cycling
  • Principles of operation
  • Maintenance of the Wine Guardian humidifier