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Hazardous Location Room Air Conditioner


For more than 30 years, industrial professionals have trusted Hazardgard® to deliver safe and reliable cooling in the most extreme conditions. Hazardgard® is specifically designed to cool laboratories, control rooms, living quarters, storage areas and other enclosures situated in hazardous locations; where specific volatile flammable liquids or gases are handled or used within enclosed containers or systems.

More About This Product

Learn about product features, tech specs, product documents & downloads, model sizing and accessories. Still need help?  View our Professional Support Page for more support topics.


Performance in Extreme Conditions

Hermetically sealed reciprocating compressor is cooled during the refrigeration cycle, which allows the unit to tolerate higher outdoor temperatures up to 130ºF/55ºC. Equipped with hot gas bypass for cooling operation at low ambient temperatures, down to 45ºF/7ºC without freezing.

Durability & Reliability

Robust engineering, commercial grade components and extensive field testing provide the durability and safety required in hazardous locations.

Meets T4 Temperature Classification

Unit surface temperatures will not rise above 275°F/135°C. Hazardgard® can tolerate higher outdoor temperatures up to 130°F/55°C. Unit will operate at low ambient conditions without freezing at outdoor ambient temperatures as low as 45°F/7°C.

Coated Coils for Corrosion Resistance

ElectroFin® 5-stage, immersion ecoat process, or Diamonblue Advanced Corrosion Protection® on 100% of metallic surfaces on the outdoor coil provides outstanding corrosion resistance protection and extends the life of the unit, especially in coastal or corrosive environments. MODEL SH24N30A ONLY.

The Friedrich Advantage

Hazardgard®’s reliable design is backed by robust engineering. Used across the globe, Hazardgard® is a tested and reliable product and not a quick-fix, job shop alteration.


Hazardgard® is designed with a slide-out chassis for more permanent installation and easier access for maintenance. Sleeve dimensions have remained the same for 20+ years for easy replacement. The unit installs in a window or through-the-wall.


Specifications By Model

See product specs for detailed specifications on Hazardgard® non-ATEX or Hazardgard® ATEX.

Model Operation Cooling BTU Reverse Heating BTU Voltage EER COP @ 47°F Cooling Area (Sq Ft.) Cooling Range SEER Refrigerant
SH15M30A Cool only 15700/15700 --- 230/208 9.7/9.7 --- --- --- --- R-410A
SH20M30B Cool only 21000/21000 --- 230/208 9.7/9.6 --- --- --- --- R-410A
SH20M30SA Cool only 19000/19000 --- 220 9.7/9.6 --- --- --- --- R-410A
SH24N30A Cool only 24000/24000 --- 230/208 9.7/8.5 --- --- --- --- R-410A
SH20M50B Cool only 21000/19100 --- 240/220 8.8/8.8 --- --- --- --- R-410A
SH24N30AT Cool only 23500/23700 --- 230/208/60 9.7/9.7 --- --- --- --- R-410A
SH20N50AT Cool only 19500/19100 --- 240/220/50 9.0/9.0 --- --- --- --- R-410A

Documents & Downloads For This Model

View manuals, guides, warranties, videos and other resources for this model.


Chassis Sizes for this Product

View basic chassis dimensions available below. See product brochure for more details on Hazardgard® non-ATEX or Hazardgard® ATEX.

H: 14 ¼“ x W: 19 ¾“ x D: 21 ⅜” Hazardgard Model Dimensions Applies to model #’s: SH20N50AT, SH24N20AT