Natural refrigerants - Articles

Ammonia Refrigeration a ‘Century-Proof’ Technology

Proven in early systems, ammonia still meets modern performance and regulatory demands

February 19, 2026

By 1926, ammonia dominated industrial refrigeration. Natural refrigerants enabled the global cold chain and continued driving innovations needed to feed a growing world.

Guntner-ADIABATIC-CONDENSER-V-SHAPE-COMPACT

FROSTlines

Navigating the Transition to Natural Refrigerants

Contractors can help customers future-proof their refrigeration systems with CO₂ and ammonia

Tania Herrera

August 6, 2025

HVACR contractors must be informed about natural refrigerants such as CO₂ and ammonia in order to help clients meet regulatory mandates and sustainability goals.

FROSTlines

Bronx Grocers Use Grants to Replace HFC Refrigeration Systems

Two Key Food stores in New York transitioned to R-290 self-contained cases

June 1, 2025

Thanks to a generous grant, two grocers in the Bronx were able to replace their HFC refrigeration systems with ultra-low GWP R-290 cases.

Busting CO₂ Refrigeration Myths

An HVAC Minute Video Update: May 14, 2024

Hannah Belloli-Oster

May 14, 2024

Debunking some of the myths that surround the use of CO₂ in commercial refrigeration systems

Copeland Oil-Free Centrifugal Compressor

Low-GWP Compressors Meet Demand for Sustainable Solutions

Manufacturers at the AHR Expo highlighted a range of energy-efficient, low-GWP compressors

Joanna R. Turpin

March 12, 2024

End users are looking for low-GWP solutions, and compressor manufacturers displayed their options at the AHR Expo.

Free Hands-On Training Offered For CO₂, R-290 Systems

NASRC to provide natural refrigerant training for refrigeration technicians in Pittsburgh

March 5, 2024

NASRC to offer free training event for refrigeration technicians in Pittsburgh who want to learn more about natural refrigerants, such as CO₂ and propane.

Project Files: Episode 68 — All-Electric, Passive-House-Certified Hotel

VRF, Heat2O units, and solar panels make this historic-building-turned-hotel highly efficient

Maria Taylor

February 20, 2024

Hotel Marcel, a 110,000-square-foot adaptive reuse of New Haven, Connecticut’s historic Pirelli Building, has raised the bar for sustainable hospitality as the first Passive-house certified, zero-emission hotel in the U.S. and one of only a dozen that are LEED Platinum-certified.

CO₂ Refrigeration Transition Offers Many Opportunities

Many food retailers consider CO₂ refrigeration to be a safe and natural refrigerant option

Peter Dee

February 6, 2024

Grocers and food retailers can adopt technology such as pressure exchangers with their CO₂ systems to increase energy efficiency while meeting climate goals.