Cabinet Enclosure Coolers

Wide Range of Maintenance from Panel Coolers, Ideal for Harsh Environments Cool Control Panels, Cabinets & Other Enclosures


The Frigid-X series Cabinet Enclosure Cooler for electronic control panels provide a low cost method of both purging and cooling electrical and electronic control panels by using a stainless steel vortex tube to create cold air from ordinary compressed air.

Our Cabinet Enclosure Coolers are compact and can be installed in minutes through a standard electrical knockout.

NEMA Type 12 (IP-52)
For Electronic Control Panels for General use in industrial environments where no direct liquid spray is applied to the unit. Stainless steel construction to hold up in corrosive environments.

NEMA Type 3R (IP-14)
For Electronic Control Panels for Outdoor Use. Stainless steel to hold up to rain, snow, humidity and general outdoor use.

NEMA Type 4-4X (IP-66)
For Electronic Control Panels – splash resistant, for use in washdown environments as well as outdoor use. Unique patented design * for secure water tight protection. Stainless steel for food service and corrosive environments. Stainless steel also provides for long life in wet environments and for outdoor use.

NEMA Type 4-4X-316L (IP-66)
The Patented* NEMA TYPE 4-4X-316L (IP 66) Frigid-X™ Panel Cooler are constructed of 316L Stainless Steel. Dust, oil-tight,spray resistant and used in environments where there are liquids and for food service and corrosive environments.

Frigid-X™ By Pass System for Panel Cooler
The Patented* NEMA TYPE 4-4X-316L (IP 66) Frigid-X™ Panel Cooler are constructed of 316L Stainless Steel. Dust, oil-tight,spray resistant and used in environments where there are liquids and for food service and corrosive environments.

* US patent number 8,616,010 / Other countries: Patented or Patent Pending *

Note: Always question non-approved units used on electrical enclosures to assure that your panels are not damaged by inferior products.

Nex Flow™ offers a High Temperature Warning Sticker free with every Frigid-X Panel Cooler purchased for the air conditioning of electrical and electronic control panels. High temperature inside a control panel can be damaging to internal equipment and lead to unplanned shutdown of factory operations. The label provides for an effective warning with a color change indicator to ORANGE and a danger warning with a color change indicator to RED. Color change is reversible so when the temperature problem is corrected, the label can continue to be used indefinitely. While it is a qualitative measurement only, it provides an ideal cautionary monitoring of possible temperature problems within a control panel.


  • Low in cost
  • Compact
  • No CFC’s
  • Fast installation
  • Stabilize enclosure temperature and humidity
  • Virtually maintenance free (No Moving Parts)
  • Mounts in a standard electrical knockout
  • Stops heat damage and nuisance tripping
  • Eliminates fans and filters
  • Prevents dirt contamination by keeping enclosure at positive pressure
  • Units applicable to all environments including high temperature to 200ºF


Temperature drop of cold air,
°F (ºC) in blue
Temperature rise of hot air,
°F (ºC) in red
Pressure Supply
Cold Fraction %


** In 316 environments normally customers will have special filtration systems for such environments already. **

*Cooling effect based on 95°F temperature inside cabinet, 100 PSIG (6.9 BAR) compressor inlet pressure, and 70ºF (21ºC) inlet temperature.*

  • BTU/hr. figures rounded to nearest 100 BTU/hr (1 WATT).
  • All Continuous Operation models include the cooling unit, filter with auto drain and cold air distribution kit.
  • All On-Off control units include the cooling unit, filter with auto drain, cold air distribution kit, solenoid valve and thermostat.


Cabinet enclosure coolers come with a 5 micron filter with an automatic drain (except for the 316L stainless steel units) for the compressed air supply to insure clean, dry air and an air distribution kit to circulate the cold air inside the enclosure for even cooling.

Cabinet enclosure coolers are available with or without thermostat control.

When constant cooling and a constant positive purge is required we recommend the continuous operating version without the thermostat and solenoid valve. The cooling effect can be controlled by adding a regulator in line to reduce pressure for reduced cooling when it is not required and to conserve energy.

Systems utilizing a thermostat and solenoid valve saves air by activating the air conditioner only when the internal temperature reaches a critical level. The adjustable thermostat is factory set at 95°F but can be readjusted on site.

Thermostat and solenoid valve systems are recommended where the heat load can fluctuate (such as for frequency drives) and where a continual purge is not required. The thermostat and solenoid “package” can also be added at a later date to a continuous system. An Electronic Thermostat System is also available replacing the thermostat and solenoid valve with a control box to “set” the temperature (ELC System).

If mounting cannot be on the top of the control panel an optional side mount is available (except or the 316L stainless units). Panel Coolers must be mounted vertical either at the top or at the side using the side mount.

Calculating head load

Total heat load consists of the heat transfer from outside your panel and from the heat dissipated inside the control unit.

Useful Terms and Conversions :

  • 1 BTU/hr = 0.293 watts
  • 1 BTU/hr – 0.000393 horsepower
  • 1 Watt = 3.415 BTU/hr
  • 1 horsepower = 2544 BTU/hr
  • 1 Watt = 0.00134 horsepower
  • 1 Square Foot = 0.0929 square meters
  • 1 Square Meter = 10.76 square foot

Typical Fan Capacity :

  • 4″ fan: 100 CFM (2832 LPM)
  • 6″ fan: 220 CFM (6230 LPM)
  • 8″ fan: 340 CFM (9628 LPM)
  • 10″ fan 550 CFM (15574 LPM)

BTU/hr. cooling effect from fan 1.08 x (temp. inside panel in °F – temp. outside panel in degrees F) x CFM.

Watts cooling effect from fan: 0.16 x (temp. inside panel in °C – temp. outside panel in degrees C) x LPM.

Calculating BTU/HR. or WATTS :

  1. Determine the heat generated inside the enclosure. Approximations may be necessary. For example, if you know the power generated inside the unit, assume 10% of the energy is dissipated as heat.
  2. For heat transfer from the outside, calculate the area exposed to the atmosphere except for the top of the control panel.
  3. Choose the internal temperature you wish to have, and choose the temperature difference between it and the maximum external temperature expected.
  4. From the conversion table that follows, determine the BTU/hr. per square foot (or watts per square meter) for the temperature difference.
  5. Multiply the panel surface area times the BTU/hr. per square foot (or watts per square meter) to get the external heat transfer in BTU/hr or in watts.
  6. Sum the internal and external heat loads calculated.
  7. If you do not know the power used in the enclosure but you can measure temperatures, then measure the temperature difference between the outside at current temperature, and the present internal cabinet temperature.
  8. Note size and number of any external fans. Provide this information to Nex Flow™  to assist in sizing the appropriate cooling system.

Example :
The control panel coolers has two frequency drives totaling 10 horsepower and one module rated at 100 watts. The maximum outside temperature expected is 105°F or 40.5°C. The area of the control panel cooler exposed sides, except for the top is 42 square feet or 3.9 square meters. We want the internal temperature to be 95° or 35°C.

Total internal power is 10 hp x 746 watts/hp – 7460 plus 100 watts = 7560 watts.
Assume 10% forms heat = an internal heat load of 756 watts.


Total internal power is 10 hp x 2544 BTU/hp = 25440 BTU/hr plus 100 watts x 3.415 BTU/hr/watt = 25782 BTU/hr.

Assume 10% forms heat = an internal heat load of 2578 BTU/hr.

External heat load: The temperature difference between the desired temperature and the outside is 10°F or 5.5°C. Using the conversions (and interpolating where necessary) we multiply the area by the conversion factor:

42 sq. ft x 3.3 – 139 BTU/hr or 3.9 sq. m x 10.3 = 40 watts

Total Heat Load: 756 + 40 – 796 watts or 2578 + 139 – 2717 BTU/hr.

You would use a Model 61040 for constant operation or a Model 63040 for one-off control. (Rated at 2900 BTU/hr or 849 watts).

Request Info

Nex Flow™ Products, Co. Ltd Bangna Residence Tower Unit No 207 324/35 Sanpawut Rd, Bangkok 10260, Thailand
Tel: 66 (0) 84 771 1224