What is the SEER2 rating of the ECOTEMP W5H8T48*K*AAA?

The ECOTEMP W5H8T48*K*AAA is rated at up to 18.0 SEER2 and 13.0 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 212 certified matchups SEER2 ranges from 15.2-18.0.

Is the ECOTEMP W5H8T48*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 4-ton model.

How much does the ECOTEMP W5H8T48*K*AAA cost to run per year?

At its rated efficiency it costs about $1,258-$3,646 a year in electricity in large U.S. cities, depending on climate and local rates - for example $1,589 in Phoenix and $3,076 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 ECOTEMP W5H8T48*K*AAA?

ENERGY STAR lists 212 certified combinations for this outdoor unit. The highest-rated ones use QFVA5D6021X, WCGL605*D, W5VC61M21XA.

4-ton central heat pump · 2-STAGE 18 SEER HP

ECOTEMP W5H8T48KAAA

Average cooling efficiency and below average heating efficiency for a 4-ton central heat pump, but not rated for cold climates.

Ranks #104 of 319 4 ton central heat pumps for cooling efficiency, and costs about $1,498 a year to run in a mixed climate like Atlanta.

SEER2: 18.0 Cooling efficiency over a season
Average · beats 66%
HSPF2: 8.5 Heating efficiency over a season
Below average · beats 38%
EER2: 13.0 Cooling efficiency on a 95°F day
Very good · beats 89%
Heat at 5°F: 26,200 BTU/h50% of its 47°F output
Excellent · beats 90%

A good fit if…

You want a choice of indoor units - 212 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

Specifications4 ton, R-454B

General
Brand	ECOTEMP
Also sold as	Grandaire
Outdoor unit model	W5H8T48KAAA
Series	2-STAGE 18 SEER HP
Type	Central heat pump
Nominal size	4 ton
CompressorVariable-speed units run longer at low power	Two-stage
Refrigerant	R-454B
Connected (smart) capable	No
On the market since	November 4, 2024
Last certified	September 16, 2026
Cooling
SEER2Seasonal efficiency, higher is better	18.0 (range 15.2-18.0)
EER2Efficiency at 95°F outdoors	11.7-13.5
Cooling capacity	46,000-50,000 BTU/h
Heating
HSPF2Seasonal efficiency, higher is better	7.8-8.5
Capacity at 47°F	48,500-52,000 BTU/h
Capacity at 17°F	30,000-32,400 BTU/h
Capacity at 5°F	23,800-26,200 BTU/h
COP at 5°F2.0 = twice as efficient as a space heater	2.10-2.32
ENERGY STAR cold climate	No

Heating output as it gets colder50% kept at 5°F

Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with QFVA5D6021X at the standard test temperatures, in BTU/h:

Certified matchups212 indoor units

The same outdoor unit scores differently with each indoor unit and furnace. The 60 highest-rated of 212 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.
QFVA5D6021X	-	18.0	13.0	8.5	25,800	218695455
QFVA5D6021X	-	18.0	13.0	8.5	25,800	218695454
WCGL605*D	-	18.0	13.5	8.1	24,600	215560728
WCGL605*D	-	18.0	13.5	8.1	24,600	215560729
W5VC61M21XA	WFEU080C060B*	17.5	13.0	8.5	24,400	215625072
W5VC61M21XA	WFEU080C060B*	17.5	13.0	8.5	24,400	215625073
W5VC61M21XA	WFEU100C060B*	17.5	12.5	8.5	25,000	215625091
W5VC61M21XA	WFEU100C060B*	17.5	12.5	8.5	25,000	215625092
W5VC61M24XA	WFET110C066A*	17.5	12.5	8.5	24,800	215625512
W5VC61M24XA	WFET110C066A*	17.5	12.5	8.5	24,800	215625513
W5VM49M21XA	WFEU080C060B*	17.5	12.5	8.1	24,400	215623325
W5VM49M21XA	WFEU080C060B*	17.5	12.5	8.1	24,400	215623326
W5VM60M21XA	WFEU080C060B*	17.5	12.5	8.1	24,400	215623724
W5VM60M21XA	WFEU080C060B*	17.5	12.5	8.1	24,400	215623723
W5VC49M24XA	WFEU080C060B*	17.5	12.5	8.1	24,600	215624482
W5VC49M24XA	WFEU080C060B*	17.5	12.5	8.1	24,600	215624481
W5VC61M21XA	WFEU060B048B*	17.5	12.0	8.1	25,000	215625053
W5VC61M21XA	WFEU060B048B*	17.5	12.0	8.1	25,000	215625054
W5VC61M21XA	WFET110C066A*	17.5	12.5	8.1	24,600	215625167
W5VC61M21XA	WFET110C066A*	17.5	12.5	8.1	24,600	215625168
QFVA5D4821X	-	17.5	12.5	8.1	25,400	218695438
QFVA5D4821X	-	17.5	12.5	8.1	25,400	218695437
W5VC61M24XA	WFEU100C060B*	17.0	12.5	8.5	25,000	215625437
W5VC61M24XA	WFEU100C060B*	17.0	12.5	8.5	25,000	215625436
W5VC61M21XA	WFSU100C060B*	17.0	12.5	8.5	24,800	215625287
W5VC61M21XA	WFSU100C060B*	17.0	12.5	8.5	24,800	215625288
W5VM48M21XA	WFEU080C060B*	17.0	12.0	8.1	24,000	215622969
W5VM48M21XA	WFEU080C060B*	17.0	12.0	8.1	24,000	215622968
W5VM49M21XA	WFEU060B048B*	17.0	12.0	8.1	25,000	215623306
W5VM49M21XA	WFEU060B048B*	17.0	12.0	8.1	25,000	215623307
W5VM49M21XA	WFEU100C060B*	17.0	12.0	8.1	24,800	215623344
W5VM49M21XA	WFEU100C060B*	17.0	12.0	8.1	24,800	215623345
W5VM49M21XA	WFET110C066A*	17.0	12.5	8.1	24,800	215623420
W5VM49M21XA	WFET110C066A*	17.0	12.5	8.1	24,800	215623421
W5VM49M21XA	WFSU100C060B*	17.0	12.0	8.1	25,200	215623554
W5VM49M21XA	WFSU100C060B*	17.0	12.0	8.1	25,200	215623555
W5VC48M21XA	WFEU080C060B*	17.0	12.0	8.1	24,000	215624109
W5VC48M21XA	WFEU080C060B*	17.0	12.0	8.1	24,000	215624108
W5VM60M21XA	WFEU060B048B*	17.0	12.0	8.1	25,000	215623704
W5VM60M21XA	WFEU060B048B*	17.0	12.0	8.1	25,000	215623705
W5VM60M21XA	WFEU100C060B*	17.0	12.0	8.1	24,800	215623743
W5VM60M21XA	WFEU100C060B*	17.0	12.0	8.1	24,800	215623742
W5VM60M21XA	WFET110C066A*	17.0	12.5	8.1	24,400	215623819
W5VM60M21XA	WFET110C066A*	17.0	12.5	8.1	24,400	215623818
W5VM60M21XA	WFSU100C060B*	17.0	12.0	8.1	24,800	215623952
W5VM60M21XA	WFSU100C060B*	17.0	12.0	8.1	24,800	215623953
W5VC60M21XA	WFET110C066A*	17.0	12.5	8.1	24,400	215624840
W5VC60M21XA	WFET110C066A*	17.0	12.5	8.1	24,400	215624839
W5VC60M21XA	WFSU100C060B*	17.0	12.0	8.1	24,800	215624945
W5VC60M21XA	WFSU100C060B*	17.0	12.0	8.1	24,800	215624946
W5VC60M21XA	WFEU060B048B*	17.0	12.0	8.1	25,000	215624760
W5VC60M21XA	WFEU060B048B*	17.0	12.0	8.1	25,000	215624761
W5VC60M21XA	WFEU100C060B*	17.0	12.0	8.1	24,800	215624779
W5VC60M21XA	WFEU100C060B*	17.0	12.0	8.1	24,800	215624780
W5VC61M24XA	WFSU100C060B*	17.0	12.0	8.1	25,200	215625653
W5VC61M24XA	WFSU100C060B*	17.0	12.0	8.1	25,200	215625654
W5VC61M21XA	WFST100C060A*	17.0	12.0	8.1	25,000	215625366
W5VC61M21XA	WFST100C060A*	17.0	12.0	8.1	25,000	215625365
W5VC61M24XA	WFST100C060A*	17.0	12.0	8.1	25,200	215625745
W5VC61M24XA	WFST100C060A*	17.0	12.0	8.1	25,200	215625746

Yearly running cost in 10 large cities$1,258-$3,646

Phoenix, AZ$1,589/yr
Miami, FL$1,258/yr
Houston, TX$1,426/yr
Atlanta, GA$1,498/yr
Los Angeles, CA$1,469/yr
New York, NY$3,646/yr
Chicago, IL$2,973/yr
Denver, CO$2,482/yr
Seattle, WA$1,533/yr
Minneapolis, MN$3,076/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 ECOTEMP W5H8T48*K*AAA?: The ECOTEMP W5H8T48*K*AAA is rated at up to 18.0 SEER2 and 13.0 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 212 certified matchups SEER2 ranges from 15.2-18.0.
Is the ECOTEMP W5H8T48*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 4-ton model.
How much does the ECOTEMP W5H8T48*K*AAA cost to run per year?: At its rated efficiency it costs about $1,258-$3,646 a year in electricity in large U.S. cities, depending on climate and local rates - for example $1,589 in Phoenix and $3,076 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 ECOTEMP W5H8T48*K*AAA?: ENERGY STAR lists 212 certified combinations for this outdoor unit. The highest-rated ones use QFVA5D6021X, WCGL605*D, W5VC61M21XA.
What refrigerant does the ECOTEMP W5H8T48*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 $1,597/yrYou save $910/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 ECOTEMP W5H8T48*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: $1,597
Current system, per year: $2,508
You save per year: $910
Payback: 19.8 years
Net after 10 years: -$8,898

Cooling $939Heating $659Electricity used: 9,984 kWhSaved vs. a minimum-efficiency heat pump: $331

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 4 ton models

Day & Night N5H8T48*K*AAA18.0 SEER2 · 8.5 HSPF2
Friedrich RD17AZ48AJ3N · cold climate18.0 SEER2 · 8.5 HSPF2
Carrier GH8TAN548**AA18.0 SEER2 · 8.5 HSPF2
Heil H5H8T48*K*AAA18.0 SEER2 · 8.5 HSPF2
Carrier 27TPA848A**3018.0 SEER2 · 8.5 HSPF2
Kenmore (C,H,T)5H8T48*K*AAA18.0 SEER2 · 8.5 HSPF2
Bryant PH8TAN548**AA18.0 SEER2 · 8.5 HSPF2
TCL THH48TEI2NAI0H24 · cold climate18.0 SEER2 · 8.5 HSPF2

See all 319 4 ton central heat pumps, ranked

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