Another New A2W HP

JakeCK

But are any of them ever going to make it to the US market? 🤔

https://www.pv-magazine.com/2023/11/29/lg-launches-residential-air-to-water-propane-heat-pump/

Hot_water_fan

The Caleffi dual fuel webinar today mentioned some new offerings too!

hot_rod

There may be some limitations as to bringing LP refrigerant systems in to the U.S. ?
Sometimes they get into Canada easier, you may already see LP units in Canada if you look deep.

EBEBRATT-Ed

R290 (propane) is already here and is used in food service refrigeration. I know True is using it. No different from other refrigerants except it is obviously flammable but the service procedures are not much different. Evacuating and charging are basically the same. The whole charge needs to be removed and purged with nitrogen to do and refrigerant repairs or brazing could be exiting if the procedures are not followed

fentonc

There are starting to be some interesting 'high-temperature' A2W heat pumps that are at least theoretically available in the US:

https://www.mbtek.com/collections/air-to-water/products/apollo-heat-pump-max-heat-36k-btu-3-ton-air-to-water-evi-inverter-dc-technology

and:

https://www.arcticheatpumps.com/high-temperature-heat-pump.html

These really are designed to be drop-in replacements for boiler retrofits - the MBTek unit advertises a COP of 2.0 with 167F SWT and an outdoor temp of 10.4F.

pecmsg

EBEBRATT-Ed said:

R290 (propane) is already here and is used in food service refrigeration. I know True is using it. No different from other refrigerants except it is obviously flammable but the service procedures are not much different. Evacuating and charging are basically the same. The whole charge needs to be removed and purged with nitrogen to do and refrigerant repairs or brazing could be exiting if the procedures are not followed

The only difference is those Systems are limited to 6 or 7 Oz total charge of R-290. 1 workaround is having 2 complete and independent Systems in the same cabinet.