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Re: R-290 Refrigerant
Posted to HVAC Forum on 7/25/2025

The MVAC DIYers have been using hydrocarbons since the R-12 retrofit days (and before that); including R-290, versions of R-290, and gas grill propane. Presently illegal in MVAC by the USA EPA mandates, but hydrocarbons are still out there, wh... Login to read more.