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Xringer · 02-07-10, 10:12 AM

I'm not sure that a CO2 ASHP would be any more efficient than my Sanyo R410A ASHP..
http://ecorenovator.org/forum/projec...l-project.html

When it was working, the Sanyo was so efficient, I can' believe that there
any ASHP that can be very much better. I'm hoping to get it back on line this month.

The Sanyo 24,000 BTU ASHP might be just as cash efficient as any
off-the-shelf 2 ton GSHP when you factor in total cost over time.

But, perhaps using cheaper CO2 is easier because it's not ruined by exposure to small amounts of air.?.

My guess is, the higher pressures of CO2 means a CO2 HP needs to handle
higher pressures than R410A.. Making the hardware a bit more costly.

02-07-10, 10:12 AM	#6
Xringer Lex Parsimoniae Join Date: Feb 2009 Location: Woburn, MA Posts: 4,918 Thanks: 114 Thanked 250 Times in 230 Posts	I'm not sure that a CO2 ASHP would be any more efficient than my Sanyo R410A ASHP.. http://ecorenovator.org/forum/projec...l-project.html When it was working, the Sanyo was so efficient, I can' believe that there any ASHP that can be very much better. I'm hoping to get it back on line this month. The Sanyo 24,000 BTU ASHP might be just as cash efficient as any off-the-shelf 2 ton GSHP when you factor in total cost over time. But, perhaps using cheaper CO2 is easier because it's not ruined by exposure to small amounts of air.?. My guess is, the higher pressures of CO2 means a CO2 HP needs to handle higher pressures than R410A.. Making the hardware a bit more costly.