R410 vs R22 thermal efficiency

[lackster]

I'm planning a springtime replacement of a 1.5T HP that conditions my homes' upper floor (1000 SF). I've confirmed this with the HVAC Calc software.

I've read on this website that R410 is more 'thermally efficient' at lower OD temps than is R22. Question: Is the converse condition true for summertime conditions here in the Atlanta area?

Thanks

[coolguysfl]

R410 has some properties that enhance it's performance over R22, but all things considered is not a stand alone compelling reason to embrace R410

If you look at the time line on the phase out of R22, (2010) unless you plan to sell & move on in the next 5 yrs -- you'd be wise to upgrade to the R410 ASAP.

The small incremental benefits of R410 will be lost by the smallest in installation shortcomings. Be sure you've chosen the BEST contractor to deliver your new system to peak performance.

[Andy Schoen]

R-410A has a much lower critical temperature than R-22, which effectively means cycle efficiency for R-410A systems will fall more quickly than systems with R-22 as ambient temperatures increase, all other things remaining the same. But coolguysfl is correct. You don't decide on R-22 vs R-410A on this issue alone. You can purchase R-22 or R-410A equipment at various SEER ratings, and your installing contractor will be the most important factor in getting the equipment to operate as designed.

The biggest issue here, IMHO, is the fact new R-22 systems will not be manufactured starting 2010.

[dash]

lackster,

Click here before you decide:

www.410a.com