Fully Ducted Self-Contained – Phantom 3500


(2 customer reviews)
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The fully ducted Phantom Series combines powerful cooling capacity with flexible installation options. If space is at a premium in your cellar and you need a powerful, fully ducted unit, the Phantom might be for you. The Phantom’s powerful blowers can be reoriented to the right, left, or top of the unit. This grants you the option of installing the unit in any ducting configuration that best suits your needs, even in limited space.

Not sure if the Phantom is the right unit for your wine cellar? Visit our Cellar Wizard and find the right cooling unit for your needs.

Note: An HVAC-R technician is recommended for installation.

*PLEASE NOTE: WhisperKOOL does not provide smart thermostat. By selecting the 24V Thermostat Conversion Kit, you have acknowledged that the system will not be built with the standard WhisperKOOL control or liquid measuring bottle probe. You will have to source and purchase your own 24V smart thermostat to run the equipment. The WhisperKOOL Customer Satisfaction Team does not provide technical support for smart thermostats. 

BTU/h Rating


The BTU/h value shown here is a theoretical number. There are often circumstances under which a cellar design may require a larger unit due to variables not accounted for in the formula. For example, these variables could be building materials (such as glass, stone, concrete, etc.) which do not offer the insulation capacity required to maintain the optimal cellar environment. We recommend purchasing a unit with a larger capacity to compensate for these unaccounted-for variables. An undersized unit can lead to premature failure and will most likely prevent the cellar from reaching your desired temperature.

Cellar Wizard

For more specific calculations, we have a tool which accounts for these variables. Please utilize this tool in order to ensure you are selecting the proper cooling unit for your application. Our tool is called the Cellar Wizard.

24V Thermostat Conversion Kit

Introducing our new 24-volt thermostat conversion kit for WhisperKOOL split systems!

Utilize industry-leading technology from major manufacturers to monitor the environment of your cellar. (See individual thermostat manufacturers’ websites for details.)

  • Connect your thermostat to Wi‑Fi to control the temperature from your phone, tablet or laptop.
  • Monitor run time and energy usage.
  • Set alarm notifications.
  • View your cellar conditions from your mobile device.

The use of the 24-volt thermostat conversion kit eliminates the thermostat normally included with the system and allows your contractor to select, purchase and install the thermostat technology of your choice, including but not limited to Nest, Ecobee, and Honeywell.

By selecting the 24V Thermostat Conversion Kit, you have acknowledged that the system will not be built with the standard WhisperKOOL control or liquid measuring bottle probe. You will have to source and purchase your own 24V thermostat to run the equipment.

  • Not utilizing the thermostat from WhisperKOOL also eliminates the use of the bottle probe.
  • WhisperKOOL does not provide smart thermostats.  Those must be purchased separately.
  • WhisperKOOL customer service staff do not provide technical support for customers’ selected thermostats.







Cellar Size:
Approx. 800 cu. ft. when 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)
BTU/h w/85°F air entering condenser coil:
37"L x 15.75"W x 15.75"H (without duct plenums), 48"L x 15.75"W x 22.75"H (duct plenums on top of unit), 48"L x 22.75"W x 15.75"H (duct plenums on side of unit)
Refrigeration Tons:
Voltage Rating:
115V (20-amp dedicated circuit required); 230V (subject to availability)
115 lbs
6 (running amps)
Duct Size:
8" supply, 10" return (evaporator and condenser)
Drain Line:
1/2" ID clear plastic tubing
Can be installed up to 25 duct feet away from cellar
Advanced digital display (50-ft. cable), liquid-temperature-measuring bottle probe (50-ft. cable)
Temp. Delta:
Can maintain a 55°F cellar temperature with up to 110°F condenser air intake temperature

Manuals / Warranty Information


Product Sheets

Warranty Information

2 reviews for Fully Ducted Self-Contained – Phantom 3500

  1. Bob T.

    For my new cellar, I needed a cooling unit that would maintain temperatures in a larger space and could be installed in the limited ceiling space above the cellar. The Phantom was the perfect unit and provided a variety of installation options with its customizable panels. It works well in the space and the noise is barely noticeable. The UV light feature is neat and prevents growth that could affect unit performance.

  2. Maxwell H

    I was working for a client on building out a custom wine cellar in their basement, as someone who installs your products often, I suggested they check out your offerings. They were instantly drawn to the fully ducted phantom for a variety of reasons – the new UV lighting add-on, and the numerous options for the duct placement were the top sellers though. The fact that these blowers can be reoriented in 3 ways allowed us to get a lot more creative with the placement of this unit. The UV lighting is a bonus that prevents mold growth and maintains an overall healthier cooling system without the upkeep. Overall a fantastic system that fit the client’s needs perfectly.

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