WhisperKOOL Slimline LS Cooling Unit

Is the WhisperKOOL Slimline LS the Right Cooling Unit for Your Wine Cellar?

The WhisperKOOL Slimline LS is a self-contained, through-the-wall wine cellar cooling unit designed for small, fully insulated wine rooms up to 650 cubic feet on low fan speed and up to 1,000 cubic feet on medium fan speed (conditions apply).

It is the direct replacement for the discontinued Slimline 2500 and Slimline 3300 models and is engineered to fit in the narrow space above a cellar doorway.

This unit is best suited for residential wine rooms where ducting is not required and condenser intake air remains controlled.

Who This Unit Is For

The Slimline LS is appropriate if:

• Your cellar is fully insulated and sealed with a proper vapor barrier
• The room has completed heat load calculations
• You need a through-the-wall (self-contained) installation
• You are replacing a Slimline 2500 or 3300
• Condenser intake air will remain at or below 85°F during normal operation
• The cellar does not exceed 1,000 cubic feet under real-world conditions

Who This Unit Is Not For

The Slimline LS is not recommended if:

• The room has extensive glass without insulation upgrades
• The cellar is not sealed or lacks a vapor barrier
• Ambient condenser intake temperatures regularly exceed 95°F
• The space exceeds 1,000 cubic feet with stone, concrete, or high thermal load
• The installation is in an unconditioned garage or outdoor structure
• A ducted or remote condenser configuration is required

Improper installation conditions may result in temperature instability, excessive runtime, and premature compressor wear.

Performance Overview

The Slimline LS uses a smart ECM condenser fan and centrifugal blower system to improve airflow efficiency and reduce vibration compared to earlier Slimline models.

It is engineered to maintain a 55°F cellar temperature when condenser intake air remains at or below 85°F.

Cooling capacity declines as intake temperatures rise above that threshold.

Cooling Capacity by Fan Speed

*Capacity estimates assume a fully insulated, sealed cellar with a properly installed vapor barrier and completed heat load calculation.

Installation Requirements

For proper performance, the Slimline LS must be installed in:

• A sealed wine cellar with a vapor barrier
• Insulated walls (recommended minimum R-19)
• Insulated ceiling (recommended minimum R-30)
• A location where condenser intake air remains below 85°F during normal operation
• A dedicated 20-amp circuit for 115V installation

Failure to meet insulation and sealing standards may result in:

• Inability to maintain 55°F
• Continuous compressor operation
• Increased humidity imbalance
• Reduced equipment lifespan

Key System Features

Dual Fan Speeds

Allows adjustment between low and medium capacity depending on thermal demand.

Smart ECM Condenser Fan

Self-regulating condenser fan improves efficiency and environmental adaptability.

Centrifugal Blowers

Designed to reduce vibration and mechanical airflow noise.

Advanced Digital Controller

Includes liquid-temperature bottle probe with retractable cable and system protection alarms.

Improved Condensate Management

Updated internal drainage system reduces moisture accumulation.

Optional UV-C Upgrade

Available accessory to reduce mold and bacterial growth within the unit.

Technical Specifications

• Dimensions: 21.5" L × 22.16" W × 10.33" H
• Weight: 81 lbs (unit), 90 lbs (shipping)
• Refrigerant: R-134a
• Horsepower: 1/5 HP
• Airflow: 81–111 CFM
• Voltage Options:
  • 115V (20-amp dedicated circuit required)
  • 230V (subject to availability)
• Running Amps: 4.3 amps
• Drain Line: 1/2" ID clear plastic tubing (not included)
• Installation Type: Through-the-wall, ideally positioned above a doorway
• Certification: UL Approved

Manuals for WhisperKOOL Slimline LS:

• Owner's Manual of WhisperKOOL Slimline LS Cooling Unit
• Product Specs Sheet of WhisperKOOL Slimline LS Cooling Unit
• Warranty Information of WhisperKOOL Slimline LS Cooling Unit

Warranty

• Two-year limited warranty (parts and labor)
• Five-year limited warranty (compressor)

Warranty coverage begins on date of purchase.

Final Consideration

The WhisperKOOL Slimline LS is a space-efficient solution for small, enclosed residential wine cellars where through-the-wall installation is preferred and environmental conditions remain controlled.

If your cellar includes glass walls, high ambient temperatures, or uncertain insulation quality, a higher-capacity or ducted cooling system should be evaluated.

UV-C Light Technology