What is the SEER2 rating of the Heil H5H8T24*K*AAA?

The Heil H5H8T24*K*AAA is rated at up to 18.5 SEER2 and 14.0 EER2 for cooling and up to 8.5 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 1494 certified matchups SEER2 ranges from 15.2-18.5.

Is the Heil H5H8T24*K*AAA 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 Heil H5H8T24*K*AAA cost to run per year?

At its rated efficiency it costs about $588-$1,789 a year in electricity in large U.S. cities, depending on climate and local rates - for example $755 in Phoenix and $1,518 in Minneapolis. The calculator on this page works it out for your city and compares it with your current system.

Is the Heil H5H8T24*K*AAA the same as the Comfortmaker C5H8T24*K*AAA?

Yes, as far as the certified ratings go. ENERGY STAR lists both model numbers with identical efficiency, capacity and matchups, which means the same outdoor unit sold under a different brand or with a minor variant code (voltage, colour or region). The full list is on this page.

Which indoor units work with the Heil H5H8T24*K*AAA?

ENERGY STAR lists 1494 certified combinations for this outdoor unit. The highest-rated ones use EVM5X32M17A, EA*5X37M21A, EA*5X37M21A*+WALLCON.

2-ton central heat pump · Mainline 18 SEER2 HP

Heil H5H8T24KAAA

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

Ranks #102 of 331 2 ton central heat pumps for cooling efficiency, and costs about $727 a year to run in a mixed climate like Atlanta.

SEER2: 18.5 Cooling efficiency over a season
Very good · beats 77%
HSPF2: 8.5 Heating efficiency over a season
Below average · beats 38%
EER2: 14.0 Cooling efficiency on a 95°F day
Excellent · beats 98%
Heat at 5°F: 11,500 BTU/h45% of its 47°F output
Very good · beats 81%

A good fit if…

You want low cooling bills - its SEER2 beats 77% of central heat pumps.
You want a choice of indoor units - 1,494 certified pairings.

Think twice if…

You often see nights below 0°F - it is not cold-climate certified.
You mainly need heat - its HSPF2 is below average for central heat pumps.

Calculate my running cost

Details

Specifications2 ton, R-454B

General
Brand	Heil
Also sold as	Arcoaire, Airquest, Comfortmaker, Day & Night, Keeprite
Outdoor unit model	H5H8T24KAAA
Series	Mainline 18 SEER2 HP
Type	Central heat pump
Nominal size	2 ton
CompressorVariable-speed units run longer at low power	Two-stage
Refrigerant	R-454B
Connected (smart) capable	No
On the market since	November 1, 2024
Last certified	September 15, 2026
Cooling
SEER2Seasonal efficiency, higher is better	18.5 (range 15.2-18.5)
EER2Efficiency at 95°F outdoors	11.7-14.0
Cooling capacity	22,200-25,000 BTU/h
Heating
HSPF2Seasonal efficiency, higher is better	7.8-8.5
Capacity at 47°F	24,000-25,400 BTU/h
Capacity at 17°F	14,100-15,000 BTU/h
Capacity at 5°F	10,700-11,500 BTU/h
COP at 5°F2.0 = twice as efficient as a space heater	1.94-2.24
ENERGY STAR cold climate	No

Heating output as it gets colder45% kept at 5°F

Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with EVM5X32M17A at the standard test temperatures, in BTU/h:

Certified matchups1,494 indoor units

The same outdoor unit scores differently with each indoor unit and furnace. The 60 highest-rated of 1,494 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.
EVM5X32M17A	80MSU0401712A	18.5	14.0	7.8	10,800	216361519
EVM5X32M17A	80MSU0401712A	18.5	14.0	7.8	10,800	216361520
EVM5X32M17A	80MSU0401712A	18.5	14.0	7.8	10,800	216361521
EVM5X32M17A	80VSL0701412B	18.5	14.0	7.8	10,900	216361495
EVM5X32M17A	80VSL0701412B	18.5	14.0	7.8	10,900	216361496
EVM5X32M17A	80VSL0701412B	18.5	14.0	7.8	10,900	216361497
EA*5X37M21A	96VSN0802120B	18.0	13.0	8.5	11,200	216366632
EA*5X37M21A	96VSN0802120B	18.0	13.0	8.5	11,200	216366633
EA*5X37M21A	96VSN0802120B	18.0	13.0	8.5	11,200	216366634
EA5X37M21A+WALLCON	80CSU0401712B	18.0	13.0	8.5	11,200	216366792
EA5X37M21A+WALLCON	80CSU0401712B	18.0	13.0	8.5	11,200	216366794
EA5X37M21A+WALLCON	80CSU0401712B	18.0	13.0	8.5	11,200	216366793
EA5X37M21A+WALLCON	80CSU0802120B	18.0	13.5	8.5	11,200	216366809
EA5X37M21A+WALLCON	80CSU0802120B	18.0	13.5	8.5	11,200	216366808
EA5X37M21A+WALLCON	80CSU0802120B	18.0	13.5	8.5	11,200	216366810
EA*5X37M21A	97VTN1002122A	18.0	13.0	8.5	11,200	216366888
EA*5X37M21A	97VTN1002122A	18.0	13.0	8.5	11,200	216366889
EA*5X37M21A	97VTN1002122A	18.0	13.0	8.5	11,200	216366890
EA*5X37M21A	97VTN0802120A	18.0	13.0	8.5	11,200	216366873
EA*5X37M21A	97VTN0802120A	18.0	13.0	8.5	11,200	216366872
EA*5X37M21A	97VTN0802120A	18.0	13.0	8.5	11,200	216366874
EA*5X37M21A	80VSL1102122B	18.0	13.0	8.5	11,100	216366432
EA*5X37M21A	80VSL1102122B	18.0	13.0	8.5	11,100	216366433
EA*5X37M21A	80VSL1102122B	18.0	13.0	8.5	11,100	216366434
EA*5X37M21A	80MSU0401712A	18.0	13.0	8.5	11,100	216366440
EA*5X37M21A	80MSU0401712A	18.0	13.0	8.5	11,100	216366441
EA*5X37M21A	80MSU0401712A	18.0	13.0	8.5	11,100	216366442
EA*5X37M21A	80MSU0601716A	18.0	13.5	8.5	11,200	216366448
EA*5X37M21A	80MSU0601716A	18.0	13.5	8.5	11,200	216366449
EA*5X37M21A	80MSU0601716A	18.0	13.5	8.5	11,200	216366450
EA*5X37M21A	80MSU0802120A	18.0	13.5	8.5	11,100	216366456
EA*5X37M21A	80MSU0802120A	18.0	13.5	8.5	11,100	216366457
EA*5X37M21A	80MSU0802120A	18.0	13.5	8.5	11,100	216366458
EA5X25M17A+WALLCON	80CSU0401712B	18.0	13.0	8.5	11,200	216365167
EA5X25M17A+WALLCON	80CSU0401712B	18.0	13.0	8.5	11,200	216365168
EA5X25M17A+WALLCON	80CSU0401712B	18.0	13.0	8.5	11,200	216365169
EA*5X37M21A	80VTL1102122B	18.0	13.0	8.5	11,200	216366536
EA*5X37M21A	80VTL1102122B	18.0	13.0	8.5	11,200	216366538
EA*5X37M21A	80VTL1102122B	18.0	13.0	8.5	11,200	216366537
EA*5X37M21A	95MSU1002120A	18.0	13.0	8.5	11,200	216366672
EA*5X37M21A	95MSU1002120A	18.0	13.0	8.5	11,200	216366673
EA*5X37M21A	95MSU1002120A	18.0	13.0	8.5	11,200	216366674
EA*5X37M21A	96VTN0802120B	18.0	13.0	8.5	11,200	216366744
EA*5X37M21A	96VTN0802120B	18.0	13.0	8.5	11,200	216366745
EA*5X37M21A	96VTN0802120B	18.0	13.0	8.5	11,200	216366746
EA*5X37M21A	96VTN1002122B	18.0	13.0	8.5	11,200	216366760
EA*5X37M21A	96VTN1002122B	18.0	13.0	8.5	11,200	216366761
EA*5X37M21A	96VTN1002122B	18.0	13.0	8.5	11,200	216366762
FTMA5B36L0C	-	18.0	13.0	8.1	10,700	216368898
FTMA5B36L0C	-	18.0	13.0	8.1	10,700	216368899
FTMA5B36L0C	-	18.0	13.0	8.1	10,700	216368900
EA5X37M21A+WALLCON	97CMN0802120B	18.0	13.0	8.1	11,200	216366592
EA5X37M21A+WALLCON	97CMN0802120B	18.0	13.0	8.1	11,200	216366593
EA5X37M21A+WALLCON	97CMN0802120B	18.0	13.0	8.1	11,200	216366594
EA5X37M21A+WALLCON	97CMN1002122B	18.0	13.0	8.1	11,200	216366600
EA5X37M21A+WALLCON	97CMN1002122B	18.0	13.0	8.1	11,200	216366601
EA5X37M21A+WALLCON	97CMN1002122B	18.0	13.0	8.1	11,200	216366602
EA*5X37M21A	96VSN0601716B	18.0	13.0	8.1	11,200	216366616
EA*5X37M21A	96VSN0601716B	18.0	13.0	8.1	11,200	216366617
EA*5X37M21A	96VSN0601716B	18.0	13.0	8.1	11,200	216366618

Same unit, other model numbers1

These model numbers have exactly the same certified ratings and matchups as the Heil H5H8T24*K*AAA: the same equipment under another brand, or a variant code for voltage, colour or market. Everything on this page applies to them.

Comfortmaker C5H8T24*K*AAA

Yearly running cost in 10 large cities$588-$1,789

Phoenix, AZ$755/yr
Miami, FL$588/yr
Houston, TX$678/yr
Atlanta, GA$727/yr
Los Angeles, CA$717/yr
New York, NY$1,789/yr
Chicago, IL$1,462/yr
Denver, CO$1,224/yr
Seattle, WA$758/yr
Minneapolis, MN$1,518/yr

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

Questions6

What is the SEER2 rating of the Heil H5H8T24*K*AAA?: The Heil H5H8T24*K*AAA is rated at up to 18.5 SEER2 and 14.0 EER2 for cooling and up to 8.5 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 1494 certified matchups SEER2 ranges from 15.2-18.5.
Is the Heil H5H8T24*K*AAA 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 Heil H5H8T24*K*AAA cost to run per year?: At its rated efficiency it costs about $588-$1,789 a year in electricity in large U.S. cities, depending on climate and local rates - for example $755 in Phoenix and $1,518 in Minneapolis. The calculator on this page works it out for your city and compares it with your current system.
Is the Heil H5H8T24*K*AAA the same as the Comfortmaker C5H8T24*K*AAA?: Yes, as far as the certified ratings go. ENERGY STAR lists both model numbers with identical efficiency, capacity and matchups, which means the same outdoor unit sold under a different brand or with a minor variant code (voltage, colour or region). The full list is on this page.
Which indoor units work with the Heil H5H8T24*K*AAA?: ENERGY STAR lists 1494 certified combinations for this outdoor unit. The highest-rated ones use EVM5X32M17A, EA*5X37M21A, EA*5X37M21A*+WALLCON.
What refrigerant does the Heil H5H8T24*K*AAA 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 $764/yrYou save $451/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 Heil H5H8T24*K*AAA

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: $764
Current system, per year: $1,215
You save per year: $451
Payback: 18.8 years
Net after 10 years: -$3,990

Cooling $438Heating $327Electricity used: 4,777 kWhSaved vs. a minimum-efficiency heat pump: $172

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.

Similar 2 ton models

Carrier GH8TAN524**AA18.5 SEER2 · 8.5 HSPF2
Carrier 27TPA824A**3018.5 SEER2 · 8.5 HSPF2
Kenmore (C,H,T)5H8T24*K*AAA18.5 SEER2 · 8.5 HSPF2
Bryant PH8TAN524**AA18.5 SEER2 · 8.5 HSPF2
Tempstar T5H8T24*K*AAA18.5 SEER2 · 8.5 HSPF2
Bryant 248TAN024**AA18.5 SEER2 · 8.5 HSPF2
WeatherMaker PH8TAN524**AB18.5 SEER2 · 8.5 HSPF2
VillaTherm VHPSD-UCHA-24HDCSN4 · cold climate18.5 SEER2 · 9.5 HSPF2

See all 331 2 ton central heat pumps, ranked

Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), certification of September 15, 2026. How we use the data.