Hi all, For a new construction project, the fan coil unit schedule shows that the fluid for the cooling coil is 30% PG (Propylene Glycol) and that of the heating coil as 40% PG. Should I consider for the equipment for the enhanced refrigerant management? Thank you!

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Trista Brown

Project Director

WSP USA

LEEDuser Basic Member

381 thumbs up

Mon, 08/28/2017 - 19:12

Hi Romio, does propylene glycol contribute to global warming or ozone depletion? I can't find any evidence online that it does, but I'd follow up with the equipment manufacturer to see if you can get some additional details.

Lyle Axelarris

Building Enclosure Consultant

BPL Enclosure

LEEDuser Basic Member

58 thumbs up

Tue, 08/29/2017 - 18:04

My understanding is that propylene glycol is not a refrigerant; it's just the working fluid to transfer heat to/from the coil (versus the refrigerant, which undergoes the vapor change process in the Rankine Cycle). We use glycol in radiant heating/cooling systems all the time and its not a refrigerant, but maybe this is a different case (?)

Founder and Principal

USL Technology Inc.

LEEDuser Premium Member

3 thumbs up

Thu, 02/27/2020 - 18:50

I have 12 units that us 50/50 glycol and water. Should I have the units in the fundamental Refrigerant prerequisite and enhanced refrigerant management credits? My team believes that only the units that are 100%refrigerant should be listed for both Fundamental Refrigerant prerequisite and enhanced refrigerant management credits. Please advise.

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Are 30% and 40% PG considered as refrigerant

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