-20° C Freezers2019-01-08T15:41:36+00:00

-20° C Freezers

CTS Walk-In -20°C Freezers are designed for maximum reliability and stability. Temperatures are maintained within a control tolerance of +0.5°C or better. These rooms can be used for the storage or testing of temperature sensitive products.

Our freezer rooms are typically supplied with desiccant de-humidifiers or dry air purge systems to maintain a low dewpoint inside the freezer and prevent the accumulation of frost on product and heat transfer surfaces.

Room Construction

The room panels will be constructed from foamed-in place urethane insulated modular panels. These modular panels are typically 4″ thick (R34) but can also be supplied in 5″ (R42) and 6″ (R56) thickness. The urethane to metal bond and 90 flange with flexible vinyl gaskets will provide an airtight seal as well as tremendous strength. The insulated panels will be UL fire test approved and will have a low flame spread rating of 25 or less. Panels will be tested and approved by Factory Mutual Number 4880, for Class I building type insulated wall and ceiling construction in combination. These room panels can be supplied in several finishes to meet your needs.

Conditioning Equipment

CTS condensing units are designed and manufactured to provide maximum reliability and require minimal maintenance. Condensing units for -20°C Freezers will be single stage and can be supplied as either air cooled or water cooled. We use heavy duty industrial semi-hermetic or scroll compressors for maximum reliability.

CTS offers fan & coil, wall plenum, or remote air handling systems. All systems will utilize proportional control valves to precisely control the room temperature. All refrigerants are non-CFC. Redundant conditioning systems with automatic switch over can be supplied for critical applications.


All control panels will be equipped with selector switches and pilot lights for easy operation. Each selector switch will be identified by engraved nameplates. The recessed control panel will be hinged for easy opening by maintenance personnel. Once the panel is swung open, all relays, contactors, and other enclosed control circuits will be readily exposed for simple maintenance. All control panels will be equipped with a lockable, clear acrylic cover. All CTS Environmental Rooms are controlled by solid state Proportional, Integral and Derivative (PID) controllers for precise temperature control. All cold rooms will be equipped with high/low temperature alarms. Alarm systems will include indicator lights, audible alarm, and dry contacts for remote monitoring. All CTS low temperature freezers are supplied with safeguards such as Man-In-Box alarms to protect personnel that are using the freezer.