Carrier air conditioners are some of the most popular air conditioners in the world, but modern air conditioning as we know it only began in 1902 when Willis Carrier was commissioned to create a stable environment for a Brooklyn printing plant. The first 'Apparatus for Treating Air' prevented minor changes in the dimensions of the paper used, and thereby prevented misalignment of four inks utilized in the printing process.

The Carrier Corporation bearing his name was founded in 1915 and has become the world's largest manufacturer and distributor of heating, ventilating and air conditioning (HVAC) systems. It has since been acquired in 1979 and is now a wholly owned subsidiary of United Technologies Corporation.

Buyers should know that aside from the Carrier air conditioners brand, Carrier also owns several other popular central air conditioning brands including ArcoAire, Bryant, Comfortmaker, Day & Night, KeepitRite, Heil, Payne, Tempstar, and Totaline.

Carrier also owns commercial food refrigeration brand Tyler as well as Transicold, which specializes in refrigeration in transportation applications.

To quickly and easily compare the specifications, warranties and features of available Carrier air conditioners, please refer to our Carrier Air Conditioners Model Comparison Chart below.

Carrier Central Air Conditioners
Model	Operation Modes	SEER (max)	HSPF (max)	Energy Star	Min Tons	Max Tons	Refrig- erant Used	Nominal Sound Level	Compressor Operation	Warranty
24ANA1	Cooling	21	N/A	Yes	2	5	R-410A	72	1 Compressor - 2 Stages	10-year parts limited warranty when properly registered
24ANA7	Cooling	17	N/A	Yes	2	5	R-410A	68	1 Compressor - 2 Stages	10-year parts limited warranty when properly registered
24APA5	Cooling	15	N/A	Yes	1.5	5	R-410A	66	1 Compressor - 1 Stage	10-year parts limited warranty when properly registered
38HDR	Cooling	15	N/A	Yes	1.5	5	R-410A	66	1 Compressor - 1 Stage	10-year parts limited warranty when properly registered
24ACB3	Cooling	15	N/A	No	1.5	5	R-410A	74	1 Compressor - 1 Stage	10-year parts limited warranty when properly registered
24ACB4	Cooling	16	N/A	Yes	1.5	5	R-410A	74	1 Compressor - 1 Stage	10-year parts limited warranty when properly registered
24ACS3	Cooling	15	N/A	No	1.5	5	R-22	74	1 Compressor - 1 Stage	5-year parts limited warranty
25HNA9	Cooling and Heating	19	9	Yes	2	5	R-410A	69	1 Compressor - 2 Stages	10-year parts limited warranty when properly registered
25HNA6	Cooling and Heating	16.6	9.3	Yes	2	5	R-410A	71	1 Compressor - 2 Stages	10-year parts limited warranty when properly registered
25HPA5	Cooling and Heating	15	8.5	Yes	1.5	5	R-410A	68	1 Compressor - 1 Stage	10-year parts limited warranty when properly registered
25HPA4	Cooling and Heating	14	8.5	Yes	1.5	5	R-410A	69	1 Compressor - 1 Stage	10-year parts limited warranty when properly registered
38QRR	Cooling and Heating	15	7.7	Yes	1.5	5	R-410A	68	1 Compressor - 1 Stage	10-year parts limited warranty when properly registered
25HCB5	Cooling and Heating	16	9	Yes	1.5	5	R-410A	74	1 Compressor - 1 Stage	10-year parts limited warranty when properly registered
25HCB4	Cooling and Heating	15.5	8.9	Yes	1.5	5	R-410A	74	1 Compressor - 1 Stage	10-year parts limited warranty when properly registered
25HCS3	Cooling and Heating	15.5	8.6	No	1.5	5	R-22	74	1 Compressor - 1 Stage	5-year parts limited warranty