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Friedrich Hazardgard® 21,000 BTU White Air Conditioner
Friedrich Hazardgard® 21,000 BTU White Air Conditioner 0
Friedrich Hazardgard® 21,000 BTU White Air Conditioner 1
Friedrich Hazardgard® 21,000 BTU White Air Conditioner 2

Friedrich Hazardgard® 21,000 BTU White Air Conditioner

Model #: SH20M50B
At a Glance
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.

Get to know this product.

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 And 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.


Misc. Specs

Product Weight (lbs.)171
Width (in.)25.94
Appliance ColorWhite
Depth (in.)27.38
Height (in.)17.94
Outdoor ApprovedYes
Control TypeTurn Knob
Commercial Use ApprovedYes
Color Finish NameWhite
Air Conditioner TypeWindow or Through-the-Wall
Maximum CFM425
Btu Cooling Rating21000
Moisture Removal Capacity Pints Per Day168
WarningProposition 65 Warning for California Residents