WhisperKOOL
WhisperKOOL Extreme 5000tiR Fully-Ducted Wine Cellar Cooling System
Regular price $7,305.00 USDUnit priceWhisperKOOL
WhisperKOOL Extreme 8000tiR Self-Contained Cooling Unit (w/ Remote)
Regular price $6,999.00 USDUnit priceWhisperKOOL
WhisperKOOL Extreme 5000tiR Self-Contained Cooling Unit (w/ Remote)
Regular price $6,555.00 USDUnit priceWhisperKOOL
WhisperKOOL Extreme 3500tiR Self-Contained Cooling Unit (w/ Remote)
Regular price $5,959.00 USDUnit priceWhisperKOOL
WhisperKOOL Extreme 8000ti Self-Contained Cooling Unit
Regular price $6,559.00 USDUnit priceWhisperKOOL
WhisperKOOL Extreme 5000ti Self-Contained Cooling Unit
Regular price $6,089.00 USDUnit priceWhisperKOOL
WhisperKOOL Extreme 3500ti Self-Contained Cooling Unit
Regular price $5,439.00 USDUnit price
Where Does the Extreme Range Make Sense?
Most cooling units assume the space around the cellar stays near normal room temperature. In a garage, an unfinished basement or an outbuilding that assumption fails, and both hot and cold extremes reach the equipment.
The Extreme range is specified for those conditions across three capacity steps. This is general planning guidance, not project-specific HVAC, structural, electrical, or code advice. Final decisions should be confirmed with licensed professionals, manufacturer documentation, and local code requirements.
Key Features of the Extreme Range
Precise Temperature
Holds a steady cellar temperature for long-term aging.
Humidity Control
Supports the humidity range wine storage needs.
Wide Ambient Range
Specified for spaces that are not climate controlled.
Two Configurations
Available self-contained or fully ducted.
Three Capacity Steps
3500, 5000 and 8000 cover mid to large cellars.
Built for Long Duty
Designed for demanding, continuous operation.
Extreme Capacity Steps
| Model | Relative Capacity | Configurations Listed |
|---|---|---|
| Extreme 3500 | Entry | Self-contained and ducted |
| Extreme 5000 | Mid | Self-contained and ducted |
| Extreme 8000 | Largest | Self-contained and ducted |
Configuration designations vary by model, so confirm the exact version on the product page. Model availability and ratings should be confirmed against current manufacturer documentation. This is general planning guidance, not project-specific HVAC, structural, electrical, or code advice. Final decisions should be confirmed with licensed professionals, manufacturer documentation, and local code requirements.
Related Cooling Types
Ducted Self-Contained
One housing, air delivered through ducts.
Through-the-Wall
Units that vent into an adjacent conditioned room.
Ducted Split
A remote condenser for larger cellars.
Ceiling Mount
Overhead installation that frees wall space.
Cellar over 2,000 cubic feet? See cooling for cellars over 2,000 cubic feet, or every WhisperKOOL line on the WhisperKOOL cooling hub.
Featured Extreme Units
Three Extreme units across the capacity steps and both configurations.

The entry capacity in the Extreme range.

Fully ducted at the 5000 capacity step.

The largest capacity in the Extreme range.
Which WhisperKOOL Extreme model fits my cellar?
The range steps up through 3500, 5000 and 8000. The right step depends on cellar volume, insulation and, importantly for this range, how hot or cold the surrounding space gets. This is general planning guidance, not project-specific HVAC, structural, electrical, or code advice. Final decisions should be confirmed with licensed professionals, manufacturer documentation, and local code requirements.
What makes the Extreme range different from other WhisperKOOL units?
It is specified for installations where the space around the cellar is not climate controlled and can reach extreme temperatures. That covers garages, unfinished basements and outbuildings, where a standard unit may struggle.
What is the WhisperKOOL Extreme 3500ti?
It is the entry capacity step in the Extreme range, listed here as a self-contained unit. The same capacity step is also offered in a ducted configuration, so check the product page for the exact version.
What is the difference between the ti and tiR versions?
Our catalogue lists both designations across self-contained and ducted configurations, so the suffix does not map cleanly to a single installation type. Confirm the exact configuration on the product page and in the manufacturer documentation before ordering.
Can an Extreme unit be installed in a garage?
A garage is one of the environments this range is aimed at, because the surrounding air temperature is not controlled. The cellar itself still needs proper insulation, sealing and a vapour barrier to perform. This is general planning guidance, not project-specific HVAC, structural, electrical, or code advice. Final decisions should be confirmed with licensed professionals, manufacturer documentation, and local code requirements.
Is the Extreme range available ducted?
Yes. The range includes fully ducted versions alongside self-contained units, so the equipment can be placed outside the cellar and connected with insulated ducts. Duct design should follow the manufacturer specifications.
Does an Extreme unit still need a well-built cellar?
Yes. A tough unit does not compensate for poor insulation, an unsealed door or a missing vapour barrier. Those elements decide the heat load the unit has to overcome.
Talk to a Wine Cellar Cooling Specialist
Get help matching an Extreme unit to your cellar size, layout, and budget. This is general planning guidance intended to narrow the selection, not a final engineered spec. Final sizing, installation design, and electrical requirements should be confirmed with manufacturer documentation and a licensed HVAC professional. Call +1 (888) 885-1670.