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Information Center > Buying Guides > Cooling Unit Buying Guides > 

Wine Cooling Unit Performance

Questions to ask when purchasing a cooling unit

Q
How do wine cooling units differ from refrigerators and air conditioners?
A
Maintain consistent temperatures
Wine cooling units are designed to maintain consistent temperatures in a tight range, with minimal noise and vibration, and humidity in the range of 50-70 percent. Read more about proper wine storage and aging conditions.
CELLARPRO: Engineered to maintain optimal cellar condition
CellarPro cooling systems are designed for long-term storing and aging of fine wine. Each CellarPro cooling unit:
  • Maintains wine storage temperatures in a tight range with minimal stratification inside the cellar
  • Allows users to increase and decrease the temperature AND relative humidity inside the cellar
  • Provides ultra-quiet, vibration-free cooling power
  • Is backed by the best warranty in the industry
 
Q
How do cooling units control temperatures inside the wine cellar?
A
Most wine cellar cooling units are programmed to:
  • Turn on when the temperature inside the cellar rises above a certain point, and
  • Turn off when the temperature falls below a certain point.
  • This temperature range can usually not be changed or customized for individual applications.
  • Units with bottle probes cycle "on" and "off" based on changes in liquid (vs air) temperatures, so the range is much tighter, so that changes in liquid temperatures are minimized.
CELLARPRO: Programmable electronic thermostat
Wine storage cooling units should maintain air temperatures inside the cellar with minimal variation and stratification. Temperature variations of +/-2°F around the set point generally result in liquid changes of less than half a degree. Stratification of 2-4°F from top to bottom are normal and within acceptable tolerances. Performance will vary depending on the ambient temperature and cellar size.

CellarPro cooling units allow adjustments to the temperature range in addition to the set point, so cycle times, energy usage and temperatures inside the cellar can be optimized for individual applications.
 
Q
How does the ambient temperature affect the cooling unit's performance?
A
Warm environments
Below 80°F, most cooling units will cycle "on" and "off" while maintaining desired temperatures inside wine cellars, if appropriately sized to match the cellar capacity. Above 80°F, many "standard" cooling units struggle to maintain desired temperatures, never cycling "off" or achieving the desired temperature. This results in high energy usage, low humidity inside the wine cellar and a shortened life for the cooling unit.

"Upgraded" cooling units offer extra cooling power to operate in warmer environments (up to 90°F); however, their noise levels often too loud for indoor residential use.
CELLARPRO: Oversized compressor, coils, and super-quiet fans
In 85°F environments, CellarPro cooling systems easily maintain 55°F and cycle on/off, while other cooling units struggle to reach 55°F and never turn off. Our cooling systems outperform the competition because we use oversized components, including a powerful compressor, extra-large coils and super-quiet powerful fans, to generate significant cooling power.

View performance data.
 
Q
Why is auto-defrost important?
A
Moisture causes ice to form
If ice collects on the evaporator coils in wine storage cooling units, moisture may enter "dry" areas of the cooling unit and/or drip into the cellar. Ice can also cause damage by fracturing the coils and restrict fans from turning freely.
CELLARPRO: Auto-defrost cycle
CellarPro cooling units are designed to periodically measure the temperature of the evaporator coils and turn off the compressor until the temperature of the coils rise above freezing. This defrost cycle prevents ice from building up on the coils, and is designed to extend the life of the cooling unit.
 
Q
How do cooling units achieve optimal humidity inside wine cellars?
A
Most units promise 50-70%, but barely handle 50%
Humidity in the range of 50-70% is ideal for proper wine storage and aging. Too much humidity can cause mold to grow on wine bottle labels, and too little humidity can cause corks to become brittle and crack.

Most cooling units promise to maintain humidity in the range of 50% to 70%, but test results indicate that they barely maintain humidity above 50%. These cooling units do not offer the ability to adjust the amount of humidity inside the cellar.
CELLARPRO: Auto-defrost cycle
CellarPro wine cooling units allow users to increase or decrease relative humidity inside their wine cellars by changing settings on the control panel.

In an 85°F test-room with 34% average relative humidity, CellarPro maintained an average of 50% relative humidity inside the cellar at RH-0 (the lowest humidity setting). After increasing the humidity setting to RH-4, the average relative humidity increased to 64% inside the wine cellar.

Click here to view our adjustable humidity control performance.