What is the SEER2 rating of the Heil R5H5S36*K*AAA?

The Heil R5H5S36*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 312 certified matchups SEER2 ranges from 15.2-16.0.

Is the Heil R5H5S36*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 3-ton model.

How much does the Heil R5H5S36*K*AAA cost to run per year?

At its rated efficiency it costs about $1,022-$2,745 a year in electricity in large U.S. cities, depending on climate and local rates - for example $1,262 in Phoenix and $2,295 in Minneapolis. The calculator on this page works it out for your city and compares it with your current system.

Is the Heil R5H5S36*K*AAA the same as the Airquest N5H5S36*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 R5H5S36*K*AAA?

ENERGY STAR lists 312 certified combinations for this outdoor unit. The highest-rated ones use FEVA0048**+NAVA54801CK, FTMA5B48L0C, FHMA5*48L*C.

3-ton central heat pump · 15 SEER2 HP

Heil R5H5S36KAAA

Below average cooling and heating efficiency for a 3-ton central heat pump, but not rated for cold climates.

Ranks #247 of 302 3 ton central heat pumps for cooling efficiency, and costs about $1,147 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: 18,100 BTU/h48% of its 47°F output
Very good · beats 80%

A good fit if…

You want a choice of indoor units - 312 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

Specifications3 ton, R-454B

General
Brand	Heil
Also sold as	Airquest, Arcoaire, Comfortmaker, Day & Night, Keeprite, Tempstar, Kenmore, Smart Comfort, MARATHERM, ACIQ
Outdoor unit model	R5H5S36KAAA
Series	15 SEER2 HP
Type	Central heat pump
Nominal size	3 ton
CompressorVariable-speed units run longer at low power	Single stage
Refrigerant	R-454B
Connected (smart) capable	No
On the market since	January 1, 2024
Last certified	July 16, 2026
Cooling
SEER2Seasonal efficiency, higher is better	16.0 (range 15.2-16.0)
EER2Efficiency at 95°F outdoors	11.7-13.0
Cooling capacity	33,800-36,800 BTU/h
Heating
HSPF2Seasonal efficiency, higher is better	7.8-8.0
Capacity at 47°F	33,200-36,400 BTU/h
Capacity at 17°F	21,000-22,800 BTU/h
Capacity at 5°F	16,100-18,100 BTU/h
COP at 5°F2.0 = twice as efficient as a space heater	2.00-2.22
ENERGY STAR cold climate	No

Heating output as it gets colder48% kept at 5°F

Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with FEVA0048**+NAVA54801CK at the standard test temperatures, in BTU/h:

Certified matchups312 indoor units

The same outdoor unit scores differently with each indoor unit. The 60 highest-rated of 312 are shown. Ask your installer for the AHRI reference number of the exact system you are quoted.

Indoor unit	SEER2	EER2	HSPF2	Heat @5°F	AHRI ref.
FEVA0048**+NAVA54801CK	16.0	13.0	8.0	17,400	217051642
FEVA0048**+NAVA54801CK	16.0	13.0	8.0	17,400	217051644
FEVA0048**+NAVA54801CK	16.0	13.0	8.0	17,400	217051646
FEVA0048**+NAVA54801CK	16.0	13.0	8.0	17,400	217051648
FEVA0048**+NAVA54801CK	16.0	13.0	8.0	17,400	217051650
FEVA0048**+NAVA54801CK	16.0	13.0	8.0	17,400	217051652
FEVA0048**+NAVA54801CK	16.0	13.0	8.0	17,400	217051654
FEVA0048**+NAVA54801CK	16.0	13.0	8.0	17,400	217051656
FEVA0048**+NAVA54801CK	16.0	13.0	8.0	17,400	217051658
FEVA0048**+NAVA54801CK	16.0	13.0	8.0	17,400	217051660
FTMA5B48L0C	15.5	12.5	7.8	16,700	214179942
FTMA5B48L0C	15.5	12.5	7.8	16,700	214179944
FTMA5B48L0C	15.5	12.5	7.8	16,700	214179946
FTMA5B48L0C	15.5	12.5	7.8	16,700	214179948
FTMA5B48L0C	15.5	12.5	7.8	16,700	214179950
FTMA5B48L0C	15.5	12.5	7.8	16,700	214179952
FTMA5B48L0C	15.5	12.5	7.8	16,700	214179954
FTMA5B48L0C	15.5	12.5	7.8	16,700	214179956
FTMA5B48L0C	15.5	12.5	7.8	16,700	214179958
FTMA5B48L0C	15.5	12.5	7.8	16,700	214179960
FHMA548LC	15.5	13.0	7.8	17,400	214180184
FHMA548LC	15.5	13.0	7.8	17,400	214180186
FHMA548LC	15.5	13.0	7.8	17,400	214180188
FHMA548LC	15.5	13.0	7.8	17,400	214180192
FHMA548LC	15.5	13.0	7.8	17,400	214180190
FHMA548LC	15.5	13.0	7.8	17,400	214180194
FHMA548LC	15.5	13.0	7.8	17,400	214180198
FHMA548LC	15.5	13.0	7.8	17,400	214180196
FHMA548LC	15.5	13.0	7.8	17,400	214180202
FHMA548LC	15.5	13.0	7.8	17,400	214180200
FEVB0048**+NAVA54801CK	15.5	12.5	7.8	17,400	214277604
FEVB0048**+NAVA54801CK	15.5	12.5	7.8	17,400	214277607
FEVB0048**+NAVA54801CK	15.5	12.5	7.8	17,400	214277610
FEVB0048**+NAVA54801CK	15.5	12.5	7.8	17,400	214277613
FEVB0048**+NAVA54801CK	15.5	12.5	7.8	17,400	214277616
FEVB0048**+NAVA54801CK	15.5	12.5	7.8	17,400	214277619
FEVB0048**+NAVA54801CK	15.5	12.5	7.8	17,400	214277621
FEVB0048**+NAVA54801CK	15.5	12.5	7.8	17,400	214277624
FEVB0048**+NAVA54801CK	15.5	12.5	7.8	17,400	214277627
FEVB0048**+NAVA54801CK	15.5	12.5	7.8	17,400	214277630
FMA5X36**AL	15.5	12.5	7.8	17,000	214424302
FMA5X36**AL	15.5	12.5	7.8	17,000	214424294
FMA5X36**AL	15.5	12.5	7.8	17,000	214424296
FMA5X36**AL	15.5	12.5	7.8	17,000	214424298
FMA5X36**AL	15.5	12.5	7.8	17,000	214424300
FMA5X36**AL	15.5	12.5	7.8	17,000	214424304
FMA5X36**AL	15.5	12.5	7.8	17,000	214424306
FMA5X36**AL	15.5	12.5	7.8	17,000	214424308
FMA5X36**AL	15.5	12.5	7.8	17,000	214424310
FMA5X36**AL	15.5	12.5	7.8	17,000	214424312
F5MA548LC	15.5	13.0	7.8	17,400	216464015
F5MA548LC	15.5	13.0	7.8	17,400	216464003
F5MA548LC	15.5	13.0	7.8	17,400	216464005
F5MA548LC	15.5	13.0	7.8	17,400	216464007
F5MA548LC	15.5	13.0	7.8	17,400	216464009
F5MA548LC	15.5	13.0	7.8	17,400	216464011
F5MA548LC	15.5	13.0	7.8	17,400	216464013
F5MA548LC	15.5	13.0	7.8	17,400	216464017
F5MA548LC	15.5	13.0	7.8	17,400	216464019
F5MA548LC	15.5	13.0	7.8	17,400	216464021

Same unit, other model numbers1

These model numbers have exactly the same certified ratings and matchups as the Heil R5H5S36*K*AAA: the same equipment under another brand, or a variant code for voltage, colour or market. Everything on this page applies to them.

Airquest N5H5S36*K*AAA

Yearly running cost in 10 large cities$1,022-$2,745

Phoenix, AZ$1,262/yr
Miami, FL$1,022/yr
Houston, TX$1,131/yr
Atlanta, GA$1,147/yr
Los Angeles, CA$1,117/yr
New York, NY$2,745/yr
Chicago, IL$2,229/yr
Denver, CO$1,854/yr
Seattle, WA$1,140/yr
Minneapolis, MN$2,295/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 R5H5S36*K*AAA?: The Heil R5H5S36*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 312 certified matchups SEER2 ranges from 15.2-16.0.
Is the Heil R5H5S36*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 3-ton model.
How much does the Heil R5H5S36*K*AAA cost to run per year?: At its rated efficiency it costs about $1,022-$2,745 a year in electricity in large U.S. cities, depending on climate and local rates - for example $1,262 in Phoenix and $2,295 in Minneapolis. The calculator on this page works it out for your city and compares it with your current system.
Is the Heil R5H5S36*K*AAA the same as the Airquest N5H5S36*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 R5H5S36*K*AAA?: ENERGY STAR lists 312 certified combinations for this outdoor unit. The highest-rated ones use FEVA0048**+NAVA54801CK, FTMA5B48L0C, FHMA5*48L*C.
What refrigerant does the Heil R5H5S36*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 $1,253/yrYou save $542/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 R5H5S36*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: $1,253
Current system, per year: $1,794
You save per year: $542
Payback: 24.0 years
Net after 10 years: -$7,584

Cooling $766Heating $487Electricity used: 7,830 kWhSaved vs. a minimum-efficiency heat pump: $123

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 3 ton models

Grandaire W5H5S36*K*AAA16.0 SEER2 · 8.0 HSPF2
Lennox EL16KP1-036-230A16.0 SEER2 · 8.0 HSPF2
Frigidaire FSH4BF5M2SX36K16.0 SEER2 · 8.0 HSPF2
Maytag PSH4BF5M2SX36K16.0 SEER2 · 8.0 HSPF2
Ducane 7HP14F36P-**A16.0 SEER2 · 8.0 HSPF2
NORDYNE SH4BF5M2SX36K16.0 SEER2 · 8.0 HSPF2
Carrier 27SCA536A**3016.0 SEER2 · 8.0 HSPF2
WeatherMaker PH5SAN536**AB16.0 SEER2 · 8.0 HSPF2

See all 302 3 ton central heat pumps, ranked

Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), certification of July 16, 2026. How we use the data.