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CARRIER Infinity 21 Central Air Conditioner

#1 of 9 CARRIER Air Conditioners

Updated: Apr 20, 2016

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Overview of the Infinity 21

The Carrier Infinity 21 is a two-stage split-system central air conditioner, which can reach efficiencies of up to 21 SEER when paired with the right air handler or furnace.

Noisy vs Quiet

The Infinity 21 can be extremely quiet, with Carrier stating in the Spring of 2014 that they produce as few as 65 decibels of sound. However, Carrier's product data sheet from 2009 says that they generate 72 decibels, so if noise is important to you, you may want to make sure that you're getting the latest models in the series. The Infinity 21 is part of the Carrier Infinity series.

Consumer Reviews of the CARRIER Infinity 21

  • Very Satisfied
  • Somewhat Satisfied
  • Neutral
  • Somewhat Unsatisfied
  • Very Unsatisfied

Date created: 2016-04-20 Name: Lionel H
Location: Ohio

Satisfaction Rating:

1 of 5 stars

"$25k Infinity system could never keep home cool"
$25K spent on a Carrier Infinity furnace and A/C unit (also zones) upgraded from a much smaller and less-efficient A/C and furnace. From the first warm day it couldn't keep my home cool even though our far- smaller previous A/C did just fine. When we set this one at 74 and it will be 80 in our home. Installer has been out 9 times making various adjustments but nothing works. Never feels like there is much air flow coming out of the vents. Oh and "Auto" mode is a joke. It can never, ever switch from heating on cool nights to A/C when it warms up during the day. Don't even try. Installer even told me it can take "hours" to switch from heating to A/C, so in the Ohio spring when it can be in the low 40's at night and 80's during the day, this thing is useless. Home will be freezing at night and then hot during the day. Even on a day like today when it is 75 outside the A/C cannot cool the inside to 74. Installer had a one-year money back guarantee and it's been a year and I am getting my money back.

Date created: 2015-12-02 Location: Morrisville, NC

Satisfaction Rating:

5 of 5 stars

"Carrier Infinity Series Review"
We have been in our current apartment for 9 months now. I have lived in apartments that used AC units with slightly higher SEER levels, but the Carrier Infinity Series is still one of the most energy-efficient central air conditioning systems available. My bill is consistently lower thanks to the many advanced technologies such as a two-stage compressor and Puron refrigerant. This makes our home cool and less humid. This unit is super quiet and most of the time I don't even notice that it is on. It is also one of the few models to make the Energy Star Most Efficient list, even though there are some units out there that offer longer warranties. This really doesn't matter to me as a renter, because I'm not really responsible for the unit upkeep. Overall, the Carrier Infinity Series is an excellent option to stay cool and keep money in my wallet, which is a major plus with twin toddlers running around the house.

Date created: 2015-10-09 Location: Lansdale, PA

Satisfaction Rating:

5 of 5 stars

"Decent central air conditioner for an apartment building"
I don't own this air conditioner, it's actually a part of my apartment building. It's nice and quiet and it cools down my apartment really quick! The only thing that I don't like about it is that once it's turned on, it gives off a slight metallic smell, which eventually dissipates when it runs for an amount of time. I told the property manager about it, but they can't seem to do anything about it. My apartment complex replaced this system last year I believe, because the last one was struck by lightning. But we do have hot summers here in Pennsylvania, and it works like a charm! I highly recommend this air conditioner for anyone who is looking to install it in their home!

Date created: 2015-10-02 Location: Southern oregon

Satisfaction Rating:

5 of 5 stars

"The Most Energy Efficent for the MOney."
Owned this for just about 9 months. This is for sure the most energy efficient for the price. I was impressed that it has a two stage compressor and most of all is very, very quiet!

Date created: 2014-09-12 Name: Frank Poirier
Location: Flagler City, FL

Satisfaction Rating:

3 of 5 stars

"Condenser coil failed after 4.5 years. Carrier unconcerned, customer reps rude."
After 4.5 years, the condenser coil leaked. Neighbors with the same model and the same time of install have had similar problems. Although parts are under warranty, labor is costly for a replacement. When I called Carrier, the only response was they knew of no problems and there are no recalls. There is more information from other buyers to be found on the web. I have emailed and written Carrier, but to date I have no response.

Date created: 2013-07-29 Name: David Borsani
Location: Phoenix, AZ.

Satisfaction Rating:

3 of 5 stars

"Many Initial Problems"
I had an Infinity System installed in 2006, but the contractor put the outside unit too close to the overhang of the house and as a result in 2009 the condenser failed. It was replaced and the unit died in 2011 but most of the problem was the fault of the installer. In 2011, I bought a new Infinity unit and it was installed on the other side of the house correctly. However, I kid you not, every two weeks the unit would spring a leak of freon. First, around the piping near the outside unit then in the main line running through the attic, then a dye test was done and found more leaks in several places. Then the 2006 coil on the inside needed replaced after only 5 years! Also, one Saturday afternoon the capacitor failed in the new unit. All of this was covered since it happened the first year but it cost the contractor many dollars. Finally they got the thing to run right and it is so cold now that I have to keep it at 78 degrees. I am in Phoenix and our summers are brutal with temperatures over 100 in July, August, and early September too. I am not too sure about the quality of Carrier as my parents years ago had a unit for decades with few problems. Not sure if I would go again with them as I heard Rheem is the better brand, but one must get the right installer from the start with any brand.

Date created: 2013-07-28 Name: John landry
Location: wakefield ,ma

Satisfaction Rating:

1 of 5 stars

"Infinity System Has Issues"
Bought the whole system back in May 2010, 96.7% efficient gas furnace and 21 seer air conditioner. Furnace has been fixed 3 times, gone out at least once in winter at 7 degrees outside. Had to wait a week for new control board to be warranty by Carrier, then they charged me $500 in labor to install it. Other 2 times it was bad pressure switches which they charged me $300 for a minimum service call. Then this year A/C went out in May and was charged $800, to charge system was 7 pounds low on refrigerant plus 3 hours to leak test system. Now in July is out again and the compressor sounds like it has marbles in it. Carrier techs say it's junk and they will cover the $3,000 condenser under warranty, but I have to pay $1,500 for a day in labor to change it out. I paid 17,000 to have this "high-end" system put in and they said I would never have a problem for 20 years. Wow they were wrong, that's my fault for believing a salesman anyway. I guess I am stuck with it now because I financed the whole system and have 5 more years to pay on it. Never buy a Carrier anything, ever.

Date created: 2012-03-16 Name: TE
Location: Friendswood, TX
Years owned: 3

Satisfaction Rating:

5 of 5 stars

"Love my Carrier Infinity AC"
My contractor installed 2 new Carrier Infinity ac and heat systems in my home approximately 3 years ago. I have never had a single issues with them and I leave in the Houston area. We use or ac's virtually year round so they work very hard. I really like the infinity thermostat. It operates to control humidity and the temperature. The only complaint is from my wife because she complains that it is sometimes too cold! That is a problem that I personally love! By the way our contractor told us that most complaints about trouble with a ac system is due to poor installation. I can definitely highly recommend Carrier and we loved our contractor, Mabry's Air Conditioning.

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CARRIER Infinity 21 Model Numbers

The Infinity 21 is available in different models which vary in efficiency and capacity.

Model Number SEER BTUs per Hour
24ANA124 21 24,000
24ANA136 21 36,000
24ANA148 21 48,000
24ANA160 21 60,000

Infinity 21 Warranty

Carrier provides a limited 10-year warranty on the compressor and other parts to the original owner of the air conditioner. The owner must register within 90 days of installation, otherwise the warranty defaults to 5 years.

Optional labor warranties are also available.

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