QOD for W/E 10-02-11 #1

Continuing with some old Cooling System questions …

The most common refrigerant found in existing residential cooling systems is:

Refrigerants are what make air conditioning possible. Contained within the coils of an air conditioner, these liquid agents cool and dehumidify indoor air. For years, the most common refrigerant used in air-conditioning systems was R-22 (Freon).
Today, in response to growing environmental concerns, production of systems using R-22 refrigerant is being phased out. Meanwhile, Lennox is leading the industry in introducing systems that use an environmentally friendly alternative to R-22.
R-22. The old standard.

Acting in accordance with an international treaty called the Montreal Protocol, the U.S. Environmental Protection Agency (EPA) has mandated the phaseout of R-22 through the Clean Air Act. As of 2010, the manufacture of systems using R-22 refrigerant will be prohibited, and by 2020 the production of R-22 itself must cease.
The main reason for this regulatory action is that R-22 is a hydrochlorofluorocarbon (HCFC) compound, which contains ozone-depleting chlorine.
R-410A. The refrigerant of the future.

Lennox has now transitioned to the manufacture of cooling systems that use the EPA-recognized chlorine-free R-410A refrigerant. Because R-410A contains no chlorine, it is considered ozone-friendly.
Lennox’ highest efficiency cooling systems are designed to use R-410A refrigerant, therefore providing an economic benefit in addition to the environmental benefit. Lennox’ R-410A systems are also known for improved reliability, quieter operation, improved dehumidification and enhanced heat pump performance.

Marcel … maybe you could wait until the end of the week to post info on the QOD to give people a chance to look up answers for themselves or even guess and then check the answer if they are not sure. Thanks.

Sorry, but just trying to back up my guess at it. ;):slight_smile:

The correct answer is …

**D. freon **

Freon (or R-22) is the most common refrigerant in existing cooling systems. Newer systems have primarily R-410A refrigerant (aka “Puron”)