Friedrich SH20M30B 26 inch Hazardgard Room Air Conditioner with 21000 BTU Cooling Capacity, Direct Wire Connection and Diamonblue Advanced Corrosion Protection in White

Hazardgard®

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.

• Performance in Extreme Conditions
• Durability & Reliability
• Meets T4 Temperature Classification
• Coated Coils for Corrosion Resistance

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.

Installation

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.

Why Buy Friedrich SH20M30B 26 inch Hazardgard Room Air Conditioner

• Hazardgard® Certified: Designed to meet strict industrial and military standards for safe operation in hazardous locations.
• Explosion-proof Construction: Built to operate safely in areas with flammable liquids or gases.
• Hermetically Sealed and Corrosion-Resistant Components: Includes a sealed compressor and environmentally protected on/off switch to withstand harsh conditions.

• Enclosed Fan Motor with Overload Protection: Provides arc-free operation, ensuring safety in potentially explosive environments.

Frequently Asked Questions

Q: What are the primary applications for the SH20M30B?

A: This unit is designed for use in hazardous environments such as offshore oil rigs, refineries, chemical storage areas, and workshops where paints and varnishes are used. It is built with commercial-grade components and robust engineering to safely cool these areas.

Q: What makes this air conditioner "hazardous location" rated?

A: The SH20M30B is UL Listed for Class 1, Division 2, Groups A, B, C, and D environments. Key safety features include:

• Hermetically sealed reciprocating compressor
• Environmentally sealed on/off switch with gold-plated contacts to resist corrosion
• Totally enclosed, commercial-grade fan motor for arc-free operation
• Solid-state control relays

Unit surface temperatures that will not exceed 275°F (135°C)

Q: What are the cooling capacity and power requirements?

A: The unit provides 21,000 BTU/hr (at both 230/208 volts) and operates on a 230/208 Volt AC power supply. It requires a dedicated 15-amp circuit with a time-delay fuse.

Q: Can it operate in extreme temperatures?

A: Yes, it is designed for outdoor temperatures up to 130°F (55°C) and features a hot gas bypass system to operate in low ambient conditions down to 45°F (7°C) without freezing.

Q: How should the unit be installed?

A: The SH20M30B has a slide-out chassis for easier installation and maintenance. It can be installed in a window or through-the-wall if the wall depth does not exceed 6 inches. Installation must follow the manual and safety precautions, including using a properly grounded outlet and avoiding extension cords.

Pros and Cons of Friedrich SH20M30B 26 inch Hazardgard Room Air Conditioner

Pros

• Safety Certification: UL Listed for Class 1, Div 2, Groups A, B, C, and D, making it safe for areas with flammable liquids or gases where standard AC units are unsafe
• Durable Construction: 20-gauge steel cabinet, commercial-grade components, and a hermetically sealed refrigeration system ensure long-lasting performance in harsh industrial environments.
• Corrosion Resistance: Diamonblue Advanced Corrosion Protection on outdoor coil surfaces extends unit life, particularly in coastal or corrosive environments.
• Extreme Temperature Operation: Operates reliably in high ambient temperatures up to 130°F (55°C) and low temperatures down to 45°F (7°C) without freezing.
• Maintainability: Slide-out chassis allows easy maintenance, and consistent sleeve dimensions for over 20 years make replacement simple.

Cons

• No Energy Star Rating: Less energy-efficient compared to standard residential units.
• Cooling Only: Does not provide heating capabilities.
• Basic Controls: Rotary dial controls only, with no remote or smart features.
• High Cost: Specialized construction and safety certifications make it significantly more expensive than standard AC units.
• Specialized Installation: May require a licensed professional and direct-wired connection to a 15-amp circuit.

Conclusion

The Friedrich SH20M30B is a highly specialized, heavy-duty air conditioner designed for hazardous industrial environments like laboratories, refineries, and factories. Its main strengths are strict safety compliance, durable construction, and corrosion resistance. It is not ideal for general residential or standard commercial use due to its high cost, basic controls, and lack of energy efficiency, but its value lies in safely providing cooling where ordinary units would pose fire or explosion risks.