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Honeywell Announces Drop-In Refrigerant Replacement

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May 16, 2022—Honeywell has announced Solstice 456A, a drop-in replacement for use in air conditioning systems.

According to Cooling Post, 456A is a low GWP replacement for R134a. Honeywell has not released the chemical components involved, however they have shared that it is "HFO-based."

Honeywell has stated that Solstice 456A “provides an easy-to-use, economical, drop-in service solution for vehicles manufactured before 2017”, according to Cooling Post.

The assumption is that the gas is R456A. This is a refrigerant blend that was announced for use by Koura, who developed it. Koura is a competitor of Honeywell.

R456A has a GWP of 626 and has shown to match the performance of R134a in automotive air conditioning systems.

Honeywell currently holds patents on R1234yf, which is a refrigerant for use in new vehicles. 


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