NOTICE: Due to a lapse in annual appropriations, most of this website is not being updated. Learn more.
Form submissions will still be accepted but will not receive responses at this time. Sections of this site for programs using non-appropriated funds (such as NVLAP) or those that are excepted from the shutdown (such as CHIPS and NVD) will continue to be updated.
An official website of the United States government
Here’s how you know
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
Comparison of an R22 and an R410A Air Conditioner Operating at High Ambient Temperatures.
Published
Author(s)
Piotr A. Domanski, W V. Payne
Abstract
R22 and R410A split air-conditioning systems were tested and compared as outdoor temperature ranged form 27.8 oC (82.0 oF) to 54.4 oF (130 oF). The R410A system tests were extended t 68.3 oC (155.0 oF) ambient temperature with a customized compressor. Capacity and efficiency of both systems decreased linearly with increasing outdoor temperature, but the R410A system performance degraded more than the R22 system performance. Operation of the R410A system was stable during all tests, including those with the customized compressor extending up to the 68.3 oF (155.0 oF) outdoor temperature and resulting in a supercritical condition at the condenser inlet. No noticeable changes in noise level or operation on the system was noted.
Proceedings Title
International Refrigeration and Air Conditioning Conference. Proceedings
high temperature, ambient temperature, tests, air conditioning, uncertainty
Citation
Domanski, P.
and Payne, W.
(2002),
Comparison of an R22 and an R410A Air Conditioner Operating at High Ambient Temperatures., International Refrigeration and Air Conditioning Conference. Proceedings, West Lafayette, IN, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=916952
(Accessed October 20, 2025)