What is the SEER2 rating of the Century HSA1424S1-**A?

The Century HSA1424S1-**A is rated at up to 16.0 SEER2 and 13.8 EER2 for cooling and up to 8.2 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 98 certified matchups SEER2 ranges from 15.2-16.0.

Is the Century HSA1424S1-**A good for cold climates?

It is not cold-climate certified: none of its matchups meet the ENERGY STAR cold-climate criteria (a COP of at least 1.75 at 5°F among other limits). In places with frequent sub-zero nights, pick a cold-climate 2-ton model.

How much does the Century HSA1424S1-**A cost to run per year?

At its rated efficiency it costs about $703-$1,731 a year in electricity in large U.S. cities, depending on climate and local rates - for example $846 in Phoenix and $1,431 in Minneapolis. The calculator on this page works it out for your city and compares it with your current system.

Which indoor units work with the Century HSA1424S1-**A?

ENERGY STAR lists 98 certified combinations for this outdoor unit. The highest-rated ones use HMA30CX1*-, 7EH30BX-**+TDR, 7EH24BX-**+TDR.

2-ton central heat pump · HSA14 Series

Century HSA1424S1-**A

Below average cooling and heating efficiency for a 2-ton central heat pump, but not rated for cold climates.

Ranks #281 of 331 2 ton central heat pumps for cooling efficiency, and costs about $739 a year to run in a mixed climate like Atlanta.

SEER2: 16.0 Cooling efficiency over a season
Below average · beats 26%
HSPF2: 8.2 Heating efficiency over a season
Below average · beats 28%
EER2: 13.8 Cooling efficiency on a 95°F day
Excellent · beats 97%
Heat at 5°F: 11,600 BTU/h51% of its 47°F output
Very good · beats 71%

A good fit if…

You want a choice of indoor units - 98 certified pairings.

Think twice if…

You often see nights below 0°F - it is not cold-climate certified.
Cooling cost matters most - its SEER2 is below average for central heat pumps.
You mainly need heat - its HSPF2 is below average for central heat pumps.
Comfort and noise matter - a single-stage compressor runs only full-on or off.

Calculate my running cost

Details

Specifications2 ton, R-454B

General
Brand	Century
Also sold as	Comfort-Aire
Outdoor unit model	HSA1424S1-**A
Series	HSA14 Series
Type	Central heat pump
Nominal size	2 ton
CompressorVariable-speed units run longer at low power	Single stage
Refrigerant	R-454B
Connected (smart) capable	No
On the market since	October 1, 2024
Last certified	May 27, 2026
Cooling
SEER2Seasonal efficiency, higher is better	16.0 (range 15.2-16.0)
EER2Efficiency at 95°F outdoors	12.0-13.8
Cooling capacity	22,800-24,000 BTU/h
Heating
HSPF2Seasonal efficiency, higher is better	7.8-8.2
Capacity at 47°F	20,400-23,000 BTU/h
Capacity at 17°F	12,900-14,700 BTU/h
Capacity at 5°F	10,600-11,600 BTU/h
COP at 5°F2.0 = twice as efficient as a space heater	1.98-2.18
ENERGY STAR cold climate	No

Heating output as it gets colder51% kept at 5°F

Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with HMA30CX1*- at the standard test temperatures, in BTU/h:

Certified matchups98 indoor units

The same outdoor unit scores differently with each indoor unit and furnace. The 60 highest-rated of 98 are shown. Ask your installer for the AHRI reference number of the exact system you are quoted.

Indoor unit	Furnace	SEER2	EER2	HSPF2	Heat @5°F	AHRI ref.
HMA30CX1*-	-	16.0	13.8	8.1	11,300	217662734
HMA30CX1*-	-	16.0	13.8	8.1	11,300	217662728
7EH30BX-**+TDR	GUH80C090B4MP*	15.5	13.4	8.1	11,000	216372585
7EH24BX-**+TDR	GUH80C070B3MP*	15.5	13.2	8.1	10,600	216372681
7EH24BX-**+TDR	GUH80C090B4MP*	15.5	13.4	8.1	10,700	216372682
7E[C,U]30BX-**+TDR	GUH80C090B4MP*	15.5	13.2	8.1	11,400	216372569
HMA30VX1*-	-	15.5	13.6	8.1	11,600	216372554
HMA30VX1*-	-	15.5	13.6	8.1	11,600	216372660
7EH24BX-**+TDR	GUH80C070B3MP*	15.5	13.2	8.1	10,600	216372575
7EH24BX-**+TDR	GUH80C090B4MP*	15.5	13.4	8.1	10,700	216372576
7EH30BX-**+TDR	GUH80C090B4MP*	15.5	13.4	8.1	11,000	216372691
7E[C,U]30BX-**+TDR	GUH80C090B4MP*	15.5	13.2	8.1	11,400	216372675
7EH24BX-**+TDR	GUH97T070B3MP	15.5	13.2	8.1	10,600	216801503
7EH24BX-**+TDR	GUH97T070B3MP	15.5	13.2	8.1	10,600	216801533
7EH30BX-**+TDR	GUH80C070B3MP*	15.5	13.4	8.0	10,900	216372584
7E[C,U]30BX-**+TDR	GUH80C070B3MP*	15.5	13.2	8.0	11,300	216372568
7E[C,U]24BX-**+TDR	GUH80C090B4MP*	15.5	13.2	8.0	10,800	216372665
7EH30BX-**+TDR	GUH80C070B3MP*	15.5	13.4	8.0	10,900	216372690
7E[C,U]24BX-**+TDR	GUH80C090B4MP*	15.5	13.2	8.0	10,800	216372559
7E[C,U]30AX-**+TDR	GUH80C070A3MP*	15.5	13.2	8.0	11,300	216372672
7E[C,U]30BX-**+TDR	GUH80C070B3MP*	15.5	13.2	8.0	11,300	216372674
7EH30BX-**+TDR	GUH92C070B3MP*	15.5	13.2	8.0	11,100	216372693
7EH30BX-**+TDR	GUH96C070B3MP*	15.5	13.2	8.0	11,100	216372694
7EH30BX-**+TDR	GUH92C070B3MP*	15.5	13.2	8.0	11,100	216372587
7EH30BX-**+TDR	GUH96C070B3MP*	15.5	13.2	8.0	11,100	216372588
7E[C,U]30AX-**+TDR	GUH80C070A3MP*	15.5	13.2	8.0	11,300	216372566
7E[C,U]30BX-**+TDR	GUH97T045B3MP*	15.5	13.0	8.0	11,300	216498816
7E[C,U]30BX-**+TDR	GUH97T045B3MP*	15.5	13.0	8.0	11,300	216498785
7E[C,U]30BX-**+TDR	GUH97T070B3MP	15.5	13.2	8.0	11,300	216801502
7E[C,U]30BX-**+TDR	GUH97T070B3MP	15.5	13.2	8.0	11,300	216801532
7E[C,U]24AX-**+TDR	GUH80C070A3MP*	15.5	13.0	7.8	10,800	216372663
7E[C,U]24BX-**+TDR	GUH80C070B3MP*	15.5	13.2	7.8	10,800	216372664
7E[C,U]24AX-**+TDR	GUH80C070A3MP*	15.5	13.0	7.8	10,800	216372557
7E[C,U]24BX-**+TDR	GUH80C070B3MP*	15.5	13.2	7.8	10,800	216372558
7E[C,U]30AX-**+TDR	GUH80C045A3MP*	15.5	13.2	7.8	11,200	216372671
7E[C,U]30AX-**+TDR	GUH80C045A3MP*	15.5	13.2	7.8	11,200	216372565
7E[C,U]24BX-**+TDR	GUH97T045B3MP*	15.5	13.0	7.8	10,800	216498815
7E[C,U]24BX-**+TDR	GUH97T045B3MP*	15.5	13.0	7.8	10,800	216498784
7EH30BX-**+TDR	GUH97T045B3MP*	15.5	13.2	7.8	10,900	216498787
7EH30BX-**+TDR	GUH97T045B3MP*	15.5	13.2	7.8	10,900	216498818
7ED30/36BX-**+TDR	GDD80C090B4MP*	15.2	13.2	8.2	11,300	216372695
7ED30/36CX-**+TDR	GDD92C090C4MP*	15.2	13.0	8.2	11,400	216372696
7ED30/36CX-**+TDR	GDD96C090C4MP*	15.2	13.2	8.2	11,300	216372697
7ED30/36BX-**+TDR	GDD80C090B4MP*	15.2	13.2	8.2	11,300	216372589
7ED30/36CX-**+TDR	GDD92C090C4MP*	15.2	13.0	8.2	11,400	216372590
7ED30/36CX-**+TDR	GDD96C090C4MP*	15.2	13.2	8.2	11,300	216372591
7E[C,U]30BX-**+TDR	GUH96C070B3MP*	15.2	13.0	8.1	11,500	216372678
7EH24BX-**+TDR	GUH96C070B3MP*	15.2	13.0	8.1	10,800	216372684
7E[C,U]30BX-**+TDR	GUH92C070B3MP*	15.2	13.0	8.1	11,500	216372571
7E[C,U]30BX-**+TDR	GUH96C070B3MP*	15.2	13.0	8.1	11,500	216372572
7EH24BX-**+TDR	GUH92C070B3MP*	15.2	13.0	8.1	10,800	216372577
7EH24BX-**+TDR	GUH96C070B3MP*	15.2	13.0	8.1	10,800	216372578
7E[C,U]30BX-**+TDR	GUH92C070B3MP*	15.2	13.0	8.1	11,500	216372677
7EH24BX-**+TDR	GUH92C070B3MP*	15.2	13.0	8.1	10,800	216372683
7EH30AX-**+TDR	GUH80X060A3MP*	15.2	12.8	8.0	11,200	216372580
7EH30AX-**+TDR	GUH80C070A3MP*	15.2	13.2	8.0	11,000	216372582
7EH30BX-**+TDR	GUH80X080B4MP*	15.2	13.2	8.0	11,100	216372583
7EH30BX-**+TDR	GUH92C045B3MP*	15.2	13.0	8.0	11,200	216372586
7E[C,U]30BX-**+TDR	GUH92C045B3MP*	15.2	12.8	8.0	11,600	216372676
7EH24BX-**+TDR	GUH80X080B4MP*	15.2	13.0	8.0	10,800	216372680

Yearly running cost in 10 large cities$703-$1,731

Phoenix, AZ$846/yr
Miami, FL$703/yr
Houston, TX$757/yr
Atlanta, GA$739/yr
Los Angeles, CA$712/yr
New York, NY$1,731/yr
Chicago, IL$1,399/yr
Denver, CO$1,158/yr
Seattle, WA$707/yr
Minneapolis, MN$1,431/yr

At each state's average electricity price and the city's typical heating and cooling hours.

Questions5

What is the SEER2 rating of the Century HSA1424S1-**A?: The Century HSA1424S1-**A is rated at up to 16.0 SEER2 and 13.8 EER2 for cooling and up to 8.2 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 98 certified matchups SEER2 ranges from 15.2-16.0.
Is the Century HSA1424S1-**A good for cold climates?: It is not cold-climate certified: none of its matchups meet the ENERGY STAR cold-climate criteria (a COP of at least 1.75 at 5°F among other limits). In places with frequent sub-zero nights, pick a cold-climate 2-ton model.
How much does the Century HSA1424S1-**A cost to run per year?: At its rated efficiency it costs about $703-$1,731 a year in electricity in large U.S. cities, depending on climate and local rates - for example $846 in Phoenix and $1,431 in Minneapolis. The calculator on this page works it out for your city and compares it with your current system.
Which indoor units work with the Century HSA1424S1-**A?: ENERGY STAR lists 98 certified combinations for this outdoor unit. The highest-rated ones use HMA30CX1*-, 7EH30BX-**+TDR, 7EH24BX-**+TDR.
What refrigerant does the Century HSA1424S1-**A use?: It uses R-454B.

Running cost and savings

Pre-filled with this model. Pick your city and what you heat with today; everything else is optional.

Heat pump $828/yrYou save $376/yrSee details ↓

1. Where you live

StateCityElectricity ¢ per kWh

Adjust heating and cooling hours

Filled in from your city's climate. Change them if you run the system much more or less than usual.

Cooling hours full-load hours per yearHeating hours full-load hours per year

2. The heat pump Century HSA1424S1-**A

Find a model (fills in the ratings below)

SEER2 cooling efficiencyHSPF2 heating efficiencyCooling capacity BTU/hHeating capacity BTU/h

3. What it replaces

Current heatingFurnace efficiency (AFUE %)Gas price, $/thermCurrent coolingOld AC rating SEER2 (10 ≈ 15+ years old)

4. Price replace the example with your quote

Installed price, $Rebates and incentives, $ utility, state

Heat pump, per year: $828
Current system, per year: $1,205
You save per year: $376
Payback: 23.9 years
Net after 10 years: -$5,237

Cooling $528Heating $300Electricity used: 5,178 kWhSaved vs. a minimum-efficiency heat pump: $91

Estimates use the unit's rated SEER2 and HSPF2, full-load hours derived from NOAA 1991-2020 degree days, average residential electricity prices from the U.S. EIA (12 months to July 2026) and fuel prices from EIA (2025 for natural gas, week of 2026-10-05 for propane and heating oil). Very cold days that need backup heat are not modelled. Federal minimum for comparison: 14.3 SEER2 / 7.5 HSPF2.

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GE NS16H24SA5-**A16.0 SEER2 · 8.2 HSPF2
Friedrich RD16AY24AJVC · cold climate16.0 SEER2 · 8.5 HSPF2
Lennox EL16KP1-024-230A16.0 SEER2 · 8.2 HSPF2
MOOVAIR MSHEA24R2AN · cold climate16.0 SEER2 · 9.0 HSPF2
American Standard N5HP5024A116.0 SEER2 · 8.1 HSPF2

See all 331 2 ton central heat pumps, ranked

Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), certification of May 27, 2026. How we use the data.