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WhisperKOOL Slimline LS Cooling Unit


WhisperKOOL Slimline LS Cooling Unit Review

When the wine cellar is fully insulated and sealed with a proper vapor barrier (each wine cellar is unique and has specific cooling requirements; heat load calculations should always be performed prior to selecting a cooling unit), the WhisperKOOL Slimline LS Cooling Unit can accommodate approximately 300 cu.ft. (low fan speed) and 650 cu.ft. (medium fan speed) cellar size.

Do you have a different size wine cellar? Or just want to check your options? You can browse our other Self-Contained Cooling Units.

Meet WhisperKOOL's newest and first unit in their Luxury Series (LS), the WhisperKOOL Slimline LS Cooling Unit,

A Direct Replacement for Slimline 2500 and Slimline 3300


whisperkool slimline ls


This cooling unit comes with larger coils for greater capacity and an all-new and improved condensate management system. It has a controller located at the condenser side of this unit for easier and fast access. And the best part of this cooling unit is it can cool at 2 capacities with just a flip of a switch! WhisperKOOL added centrifugal blowers which are significantly quieter and can be set at medium or low speed. 

Let's not overlook the aesthetic of this unit and how sleek and timeless it looks. It has a simple but captivating case perfect to go with any theme in your wine cellar. Whether your cellar has a rustic or modern design, we are sure the Slimline LS cooling unit will definitely blend in your decor!

WhisperKOOL Slimline LS Cooling Unit is the most compact and quietest self-contained cooling unit made by WhisperKOOL.This is designed to be mounted in a living area and can be placed in the often-unused space between the cellar door and ceiling. It fits snugly above your cellar door, out of the way, providing efficient cooling and a low sight profile.



  • Through-the-wall installation
  • Condensate Evaporator 
  • Two-speed fan switch
  • Up to 45% more capacity 
  • UV light upgrade 
  • Customizable front panel 
  • Quiet and efficient operation
  • Advanced electronic display
  • Liquid-temperature-measuring bottle probe
  • Can be mounted in the often-unused space above a door
  • 30°F temperature differential

UV Lighting System (OPTIONAL)

Ultraviolet Germicidal Irradiation (UVGI) is a disinfection method that uses short-wavelength ultraviolet (UV-C) light to kill microorganisms such as fungus, mold, mildew, and bacteria. The application of UVGI to disinfection has been an accepted practice since the 1950s and is used in a variety of applications such as food, air, and water purification. In recent years, UVGI has found renewed application in air purifiers. Adding UV lighting to a cooling unit increases overall indoor air quality while improving the performance of the unit. Specifically, the UV light option will protect your unit from mold and other bacterial growth.

How does UV light work?

Commonly used in HVAC application, this UV disinfection method uses short-wavelength ultraviolet (UV-C) light to kill microorganisms. When exposed to UV-C, DNA begins to degrade and eventually becomes so damaged that it is no longer usable. As mold, fungus, or bacteria are exposed to UV-C, their DNA degrades until they are no longer able to reproduce, and they eventually die. While UV-C light ranges from 200 to 300 nm, our UV-C light uses an optimal frequency of 254 nm.

How does UV lighting work with the new Slimline LS Cooling Unit?

Air handlers are particularly susceptible to microorganism growth. Fungus, mold, and bacteria can be pulled in from the cellar or outside. Once inside the unit, the organisms have a perfect place to grow due to the moisture built up in the compartment; from there, the organisms are pushed back into the cellar. Our UV lighting system is designed as an add-on feature that will target the buildup of these microorganisms.

The bulb is positioned inside the evaporator compartment such that the evaporator coil and drip tray are exposed directly to UV light to ensure that these components stay unclogged and are running at optimal efficiency, which improves overall system performance. The transformer box and UV bulb can be mounted to any access panel on the evaporator side of the cooling unit, depending on the blower orientation. With this arrangement, the UV light never comes into contact with wine bottles in the cellar.




Model: Slimline LS
Cellar Size:
Approx. 300 cu.ft. (low fan speed) and 650 cu.ft. (medium fan speed) when the cellar is fully insulated and sealed with a proper vapor barrier 
BTU/h w/60°F air entering condenser coil: Low speed fan - 2601/1961 (total/sensible) Medium fan speed - 3032/2413 (total/sensible)
BTU/h w/75°F air entering condenser coil: Low speed fan - 2635/1951 (total/sensible) Medium fan speed - 2904/2309 (total/sensible)
BTU/h w/85°F air entering condenser coil: Low speed fan - 2396/1870 (total/sensible) Medium fan speed - 2612/2158 (total/sensible)
BTU/h w/95°F air entering condenser coil: Low speed fan - 2205/1704 (total/sensible) Medium fan speed - 2392/2008 (total/sensible)
Dimensions (L x W x H):
21.5” x 22.16” x 10.33”
Refrigerant: R-134a
HP: 1/5
Voltage Rating: 115V (20-amp dedicated circuit required); 230V (subject to availability)
Weight: 81 lbs. (without packaging), 90 lbs. (with packaging)
Amps: 4.3 (running amps)
Drain Line: 1/2” ID clear plastic tubing (NOT PROVIDED)
Installation: Through the wall (above a doorway)
Advanced digital controller, liquid-temperature-measuring bottle probe (retractable cable)
Temp. Delta: Can maintain a 55°F cellar temperature with up to 85°F condenser air intake temperature
Outside Venting: Not recommended
Two-year limited warranty (parts and labor) / Five-year limited warranty (compressor)

Reminder: Heat load calculations should always be performed prior to selecting a cooling unit.

Buy the WhisperKOOL Slimline LS Cooling Unit today and enjoy your amazing wines at its best temperature!

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Customer Reviews

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