What is the SEER2 rating of the Heil H5H6S19*K*AAA?

The Heil H5H6S19*K*AAA is rated at up to 16.0 SEER2 and 13.0 EER2 for cooling and up to 8.0 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 228 certified matchups SEER2 ranges from 15.2-16.0.

Is the Heil H5H6S19*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 1.5-ton model.

How much does the Heil H5H6S19*K*AAA cost to run per year?

At its rated efficiency it costs about $561-$1,526 a year in electricity in large U.S. cities, depending on climate and local rates - for example $695 in Phoenix and $1,277 in Minneapolis. The calculator on this page works it out for your city and compares it with your current system.

Is the Heil H5H6S19*K*AAA the same as the Comfortmaker C5H6S19*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 H5H6S19*K*AAA?

ENERGY STAR lists 228 certified combinations for this outdoor unit. The highest-rated ones use FM(C,U)5Z30**AL, EA*5X25M17A, EA*5X25M17A*+WALLCON.

1.5-ton central heat pump · MAINLINE 16 SEER2 HP

Heil H5H6S19KAAA

Below average cooling and heating efficiency for a 1.5-ton central heat pump, but not rated for cold climates.

Ranks #131 of 170 1.5 ton central heat pumps for cooling efficiency, and costs about $636 a year to run in a mixed climate like Atlanta.

SEER2: 16.0 Cooling efficiency over a season
Below average · beats 26%
HSPF2: 8.0 Heating efficiency over a season
Below average · beats 12%
EER2: 13.0 Cooling efficiency on a 95°F day
Very good · beats 89%
Heat at 5°F: 8,500 BTU/h43% of its 47°F output
Below average · beats 39%

A good fit if…

You want a choice of indoor units - 228 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

Specifications1.5 ton, R-454B

General
Brand	Heil
Also sold as	Airquest, Arcoaire, Comfortmaker, Day & Night, Keeprite
Outdoor unit model	H5H6S19KAAA
Series	MAINLINE 16 SEER2 HP
Type	Central heat pump
Nominal size	1.5 ton
CompressorVariable-speed units run longer at low power	Single stage
Refrigerant	R-454B
Connected (smart) capable	No
On the market since	July 31, 2025
Last certified	July 17, 2026
Cooling
SEER2Seasonal efficiency, higher is better	16.0 (range 15.2-16.0)
EER2Efficiency at 95°F outdoors	12.5-13.0
Cooling capacity	17,700-19,300 BTU/h
Heating
HSPF2Seasonal efficiency, higher is better	7.8-8.0
Capacity at 47°F	18,400-19,500 BTU/h
Capacity at 17°F	10,300-11,000 BTU/h
Capacity at 5°F	7,900-8,500 BTU/h
COP at 5°F2.0 = twice as efficient as a space heater	1.90-2.00
ENERGY STAR cold climate	No

Heating output as it gets colder43% kept at 5°F

Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with FM(C,U)5Z30**AL at the standard test temperatures, in BTU/h:

Certified matchups228 indoor units

The same outdoor unit scores differently with each indoor unit and furnace. The 60 highest-rated of 228 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.
FM(C,U)5Z30**AL	-	16.0	13.0	8.0	8,100	217687303
EA*5X25M17A	80MSU0401712A	16.0	13.0	8.0	8,300	217722520
EA*5X25M17A	80MSU0401712A	16.0	13.0	8.0	8,300	217722521
EA*5X25M17A	80MSU0401712A	16.0	13.0	8.0	8,300	217722522
EA*5X25M17A	80MSU0601716A	16.0	13.0	8.0	8,400	217722529
EA*5X25M17A	80MSU0601716A	16.0	13.0	8.0	8,400	217722528
EA*5X25M17A	80MSU0601716A	16.0	13.0	8.0	8,400	217722530
EA5X25M17A+WALLCON	80CTL0701412B	16.0	13.0	8.0	8,400	217722544
EA5X25M17A+WALLCON	80CTL0701412B	16.0	13.0	8.0	8,400	217722545
EA5X25M17A+WALLCON	80CTL0701412B	16.0	13.0	8.0	8,400	217722546
EA*5X25M17A	80VTL0451412B	16.0	13.0	8.0	8,400	217722568
EA*5X25M17A	80VTL0451412B	16.0	13.0	8.0	8,400	217722569
EA*5X25M17A	80VTL0451412B	16.0	13.0	8.0	8,400	217722570
EA*5X25M17A	80VTL0701716B	16.0	13.0	8.0	8,400	217722576
EA*5X25M17A	80VTL0701716B	16.0	13.0	8.0	8,400	217722577
EA*5X25M17A	80VTL0701716B	16.0	13.0	8.0	8,400	217722578
EA5X19M17A+WALLCON	96CTN0801714B	16.0	13.0	8.0	8,300	217721751
EA5X19M17A+WALLCON	96CTN0801714B	16.0	13.0	8.0	8,300	217721753
EA5X19M17A+WALLCON	96CTN0801714B	16.0	13.0	8.0	8,300	217721752
EA5X25M17A+WALLCON	96CTN0801714B	16.0	13.0	8.0	8,300	217722745
EA5X25M17A+WALLCON	96CTN0801714B	16.0	13.0	8.0	8,300	217722746
EA5X25M17A+WALLCON	96CTN0801714B	16.0	13.0	8.0	8,300	217722747
FM(C,U)5Z30**AL	-	16.0	13.0	8.0	8,100	217726356
FM(C,U)5Z30**AL	-	16.0	13.0	8.0	8,100	217726357
EA*5X25M17A	80MS(N,L)0451412A	16.0	13.0	8.0	8,400	217722440
EA*5X25M17A	80MS(N,L)0451412A	16.0	13.0	8.0	8,400	217722441
EA*5X25M17A	80MS(N,L)0451412A	16.0	13.0	8.0	8,400	217722442
EA*5X19M17A	92MSN0601714A	16.0	13.0	8.0	8,400	217721613
EA*5X19M17A	92MSN0601714A	16.0	13.0	8.0	8,400	217721614
EA*5X19M17A	92MSN0601714A	16.0	13.0	8.0	8,400	217721615
EA*5X19M17A	92MSN0801716A	16.0	13.0	8.0	8,300	217721621
EA*5X19M17A	92MSN0801716A	16.0	13.0	8.0	8,300	217721622
EA*5X19M17A	92MSN0801716A	16.0	13.0	8.0	8,300	217721623
EA*5X25M17A	80MS(N,L)0701412A	16.0	13.0	8.0	8,300	217722456
EA*5X25M17A	80MS(N,L)0701412A	16.0	13.0	8.0	8,300	217722457
EA*5X25M17A	80MS(N,L)0701412A	16.0	13.0	8.0	8,300	217722458
EA*5X25M17A	80MS(N,L)0701712A	16.0	13.0	8.0	8,400	217722464
EA*5X25M17A	80MS(N,L)0701712A	16.0	13.0	8.0	8,400	217722465
EA*5X25M17A	80MS(N,L)0701712A	16.0	13.0	8.0	8,400	217722466
EA*5X25M17A	80MS(N,L)0701716A	16.0	13.0	8.0	8,400	217722472
EA*5X25M17A	80MS(N,L)0701716A	16.0	13.0	8.0	8,400	217722473
EA*5X25M17A	80MS(N,L)0701716A	16.0	13.0	8.0	8,400	217722474
EA*5X25M17A	80MS(N,L)0901714A	16.0	13.0	8.0	8,300	217722480
EA*5X25M17A	80MS(N,L)0901714A	16.0	13.0	8.0	8,300	217722481
EA*5X25M17A	80MS(N,L)0901714A	16.0	13.0	8.0	8,300	217722482
EA*5X25M17A	80VSL0451412B	16.0	13.0	8.0	8,400	217722488
EA*5X25M17A	80VSL0451412B	16.0	13.0	8.0	8,400	217722489
EA*5X25M17A	80VSL0451412B	16.0	13.0	8.0	8,400	217722490
EA*5X25M17A	80VSL0701412B	16.0	13.0	8.0	8,400	217722496
EA*5X25M17A	80VSL0701412B	16.0	13.0	8.0	8,400	217722497
EA*5X25M17A	80VSL0701412B	16.0	13.0	8.0	8,400	217722498
EA*5X25M17A	80VSL0701716B	16.0	13.0	8.0	8,400	217722504
EA*5X25M17A	80VSL0701716B	16.0	13.0	8.0	8,400	217722505
EA*5X25M17A	80VSL0701716B	16.0	13.0	8.0	8,400	217722506
EA*5X25M17A	80VSL0901716B	16.0	13.0	8.0	8,400	217722512
EA*5X25M17A	80VSL0901716B	16.0	13.0	8.0	8,400	217722513
EA*5X25M17A	80VSL0901716B	16.0	13.0	8.0	8,400	217722514
EA5X25M17A+WALLCON	97CMN0801714B	16.0	13.0	8.0	8,400	217722600
EA5X25M17A+WALLCON	97CMN0801714B	16.0	13.0	8.0	8,400	217722601
EA5X25M17A+WALLCON	97CMN0801714B	16.0	13.0	8.0	8,400	217722602

Same unit, other model numbers1

These model numbers have exactly the same certified ratings and matchups as the Heil H5H6S19*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 C5H6S19*K*AAA

Yearly running cost in 10 large cities$561-$1,526

Phoenix, AZ$695/yr
Miami, FL$561/yr
Houston, TX$623/yr
Atlanta, GA$636/yr
Los Angeles, CA$620/yr
New York, NY$1,526/yr
Chicago, IL$1,240/yr
Denver, CO$1,032/yr
Seattle, WA$635/yr
Minneapolis, MN$1,277/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 H5H6S19*K*AAA?: The Heil H5H6S19*K*AAA is rated at up to 16.0 SEER2 and 13.0 EER2 for cooling and up to 8.0 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 228 certified matchups SEER2 ranges from 15.2-16.0.
Is the Heil H5H6S19*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 1.5-ton model.
How much does the Heil H5H6S19*K*AAA cost to run per year?: At its rated efficiency it costs about $561-$1,526 a year in electricity in large U.S. cities, depending on climate and local rates - for example $695 in Phoenix and $1,277 in Minneapolis. The calculator on this page works it out for your city and compares it with your current system.
Is the Heil H5H6S19*K*AAA the same as the Comfortmaker C5H6S19*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 H5H6S19*K*AAA?: ENERGY STAR lists 228 certified combinations for this outdoor unit. The highest-rated ones use FM(C,U)5Z30**AL, EA*5X25M17A, EA*5X25M17A*+WALLCON.
What refrigerant does the Heil H5H6S19*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 $692/yrYou save $298/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 H5H6S19*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: $692
Current system, per year: $990
You save per year: $298
Payback: 23.5 years
Net after 10 years: -$4,020

Cooling $420Heating $272Electricity used: 4,324 kWhSaved vs. a minimum-efficiency heat pump: $68

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 1.5 ton models

Luxaire XH618E2S1116.0 SEER2 · 8.0 HSPF2
ECOTEMP W5H5S19*K*AAA16.0 SEER2 · 8.0 HSPF2
Tempstar T5H6S19*K*AAA16.0 SEER2 · 8.0 HSPF2
Day & Night R5H5S19*K*AAA16.0 SEER2 · 8.0 HSPF2
WeatherMaker PH5SAN519**AB16.0 SEER2 · 8.0 HSPF2
Carrier 27SPA619A**3016.0 SEER2 · 8.0 HSPF2
York YH618E2S1116.0 SEER2 · 8.0 HSPF2
Bryant PH5SAN519**AA16.0 SEER2 · 8.0 HSPF2

See all 170 1.5 ton central heat pumps, ranked

Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), certification of July 17, 2026. How we use the data.