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.
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