Compressor difference between different efficiency window A/Cs?

NiHaoMike · 06-15-13, 07:58 PM

When comparing a 9.7 EER window A/C to a 10.7 EER window A/C of the same age and BTU rating, how much difference (if any) is there between the compressors? Do older window A/Cs have much less efficient compressors?

I'm starting to pick out a window A/C or dehumidifier for my heat pump water heater project. Since I'm going to use ES22a (mostly R290), how will the efficiency change if I started with a R410a unit? (I know that the effective capacity would be reduced and the expansion valve would have to be replaced. Also, if I started with a R410a unit, I would reuse the R410a to make a freeze drying machine.)

06-15-13, 07:58 PM	#1
NiHaoMike Supreme EcoRenovator Join Date: Oct 2008 Location: Austin, TX Posts: 1,154 Thanks: 14 Thanked 257 Times in 241 Posts	Compressor difference between different efficiency window A/Cs? When comparing a 9.7 EER window A/C to a 10.7 EER window A/C of the same age and BTU rating, how much difference (if any) is there between the compressors? Do older window A/Cs have much less efficient compressors? I'm starting to pick out a window A/C or dehumidifier for my heat pump water heater project. Since I'm going to use ES22a (mostly R290), how will the efficiency change if I started with a R410a unit? (I know that the effective capacity would be reduced and the expansion valve would have to be replaced. Also, if I started with a R410a unit, I would reuse the R410a to make a freeze drying machine.) __________________ To my surprise, shortly after Naomi Wu gave me a bit of fame for making good use of solar power, Allie Moore got really jealous of her...