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Solstice®;HFO Solutions have a tangible, dramatic, and positive environmental impact

Honeywell's breakthrough Solstice® hydrofluoroolefin (HFO) technology, which helps customers lower their carbon footprint and improve energy efficiency without sacrificing end-product performance, is used in various applications, including refrigerants for supermarkets, air conditioning for cars and trucks, blowing agents for insulation, propellants for personal and household care and solvents for cleaning solutions. Honeywell has already invested a billion dollars in research, development, and new capacity for the technology, having anticipated the need for lower-GWP solutions to combat climate change more than a decade ago.


metric tons of CO2e have been removed from the atmosphere to date. This is equivalent of: 
Carbon sequestered by


acres of U.S. forests in one year
Potentially avoiding greenhouse gas emissions from


tons of waste recycled instead of landfilled


gasoline-powered passenger vehicles off the road for one year
Potentially avoiding CO2 emissions from


barrels of oil consumed

Featured Products

Solstice® N71 (R-471A)

Solstice® N71 (R-471A) is Honeywell’s newest non-ozone depleting, non-flammable, HFO based refrigerant, which helps our customers lower their carbon footprint and improve energy efficiency without sacrificing end-product performance. It’s the only < 150 GWP, non-flammable HFO refrigerant blend for new equipment in medium temperature applications.

Solstice® N40 (R-448A)

Solstice® N40 (R-448A) is a nonflammable, reduced-GWP HFO blend for new supermarkets or R-404A retrofits, especially low- and medium-temp refrigeration. More than 60,000 supermarkets globally, trust Solstice® N40 (R448A) to help them comply with current and proposed regulations, with the aim of reducing the use of high-GWP HFCs.

Solstice® Propellant

Solstice®  Propellant (HFO-1234ze), a non-flammable, low GWP solution for aerosol applications, including personal care products, pressure dusters, lubricants and cleaners, and disinfectants. 

Solstice® Air (HFO-1234ze(E)

Solstice®  Air (HFO-1234ze(E), cGMP) is a non-flammable, ultra-low GWP aerosol propellant for Metered Dose Inhalers and one of the recent breakthroughs of the Solstice®  portfolio. Honeywell teamed with AstraZeneca to develop next-generation respiratory inhalers.  Next-generation inhalers will use Honeywell's Solstice® Air to reduce greenhouse gas emissions of propellant by 99.9 percent vs current inhaler propellant.

Solstice® ze

Solstice®  ze, an energy efficient, ultra-low GWP refrigerant, has been adopted by heat pump manufacturers to deliver low-carbon and energy cost savings in groundbreaking projects throughout Europe.

Solstice® yf

Solstice® yf (R-1234yf) refrigerant is a near drop-in replacement for R-134a in automobile A/C applications, helping automakers around the world comply with EU low GWP requirements.

Solstice® Liquid Blowing Agent (LBA)

Solstice®  Liquid Blowing Agent (LBA), an ultra-low GWP solution used in a variety of rigid foam insulation applications, including residential and commercial refrigeration equipment, spray foam, pour-in-place insulation, and insulated metal panels.

Solstice® Gas Blowing Agent (GBA)

Solstice®  Gas Blowing Agent (GBA), is an ultra-low GWP solution used in a variety of foam insulation applications.

Solstice®  Technology Portfolio

Solstice® Refrigerants
Solstice® Propellants & Solvents
Solstice® Foam Blowing Agents

Ready To Connect?

Contact us to schedule a meeting with our sales team to discuss how Solstice® Solutions can help you.

*Calculations are based on actual sales of Solstice products (in lbs) from Jan 2010 through Dec 2022, and utilize the EPA GHG equivalency calculator for conversion.