What is the SEER2 rating of the Invertercool COH17S-36AD?

The Invertercool COH17S-36AD is rated at up to 18.5 SEER2 and 12.0 EER2 for cooling and up to 8.8 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 2 certified matchups SEER2 ranges from 17.5-18.5.

Is the Invertercool COH17S-36AD good for cold climates?

Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 24,000 BTU/h at 5°F with a COP of 2.00, so it is still 2.0 times as efficient as electric resistance heat at that temperature.

How much does the Invertercool COH17S-36AD cost to run per year?

At its rated efficiency it costs about $870-$2,430 a year in electricity in large U.S. cities, depending on climate and local rates - for example $1,087 in Phoenix and $2,041 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 Invertercool COH17S-36AD?

ENERGY STAR lists 2 certified combinations for this outdoor unit. The highest-rated ones use CVEED-24BE, CVEED-36BE.

3-ton central heat pump · R32 Heat Pump

Invertercool COH17S-36AD

Very good cooling efficiency and average heating efficiency for a 3-ton central heat pump, and certified for cold climates.

Ranks #73 of 302 3 ton central heat pumps for cooling efficiency, and costs about $1,006 a year to run in a mixed climate like Atlanta.

SEER2: 18.5 Cooling efficiency over a season
Very good · beats 77%
HSPF2: 8.8 Heating efficiency over a season
Average · beats 49%
EER2: 12.0 Cooling efficiency on a 95°F day
Average · beats 64%
Heat at 5°F: 24,000 BTU/h75% of its 47°F output
Below average · beats 39%

A good fit if…

You want low cooling bills - its SEER2 beats 77% of central heat pumps.
Your winters get properly cold - it is ENERGY STAR cold-climate certified, with 24,000 BTU/h at 5°F.
You want steady temperatures and quiet running - the compressor varies its speed.

Think twice if…

Nothing stands out - its ratings have no weak spot for its class.

Calculate my running cost

Details

Specifications3 ton, R-32

General
Brand	Invertercool
Outdoor unit model	COH17S-36AD
Series	R32 Heat Pump
Type	Central heat pump
Nominal size	3 ton
CompressorVariable-speed units run longer at low power	Continuously variable
Refrigerant	R-32
Connected (smart) capable	No
On the market since	May 20, 2026
Last certified	July 7, 2026
Cooling
SEER2Seasonal efficiency, higher is better	18.5 (range 17.5-18.5)
EER2Efficiency at 95°F outdoors	11.0-12.0
Cooling capacity	24,000-34,200 BTU/h
Heating
HSPF2Seasonal efficiency, higher is better	8.8
Capacity at 47°F	24,000-34,200 BTU/h
Capacity at 17°F	20,600-26,600 BTU/h
Capacity at 5°F	18,000-24,000 BTU/h
COP at 5°F2.0 = twice as efficient as a space heater	2.00
ENERGY STAR cold climate	Yes

Heating output as it gets colder75% kept at 5°F

Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with CVEED-24BE at the standard test temperatures, in BTU/h:

Certified matchups2 indoor units

The same outdoor unit scores differently with each indoor unit. 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.
CVEED-24BE · cold climate	18.5	12.0	8.8	18,000	218405520
CVEED-36BE · cold climate	17.5	11.0	8.8	24,000	218405521

Yearly running cost in 10 large cities$870-$2,430

Phoenix, AZ$1,087/yr
Miami, FL$870/yr
Houston, TX$975/yr
Atlanta, GA$1,006/yr
Los Angeles, CA$984/yr
New York, NY$2,430/yr
Chicago, IL$1,977/yr
Denver, CO$1,648/yr
Seattle, WA$1,015/yr
Minneapolis, MN$2,041/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 Invertercool COH17S-36AD?: The Invertercool COH17S-36AD is rated at up to 18.5 SEER2 and 12.0 EER2 for cooling and up to 8.8 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 2 certified matchups SEER2 ranges from 17.5-18.5.
Is the Invertercool COH17S-36AD good for cold climates?: Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 24,000 BTU/h at 5°F with a COP of 2.00, so it is still 2.0 times as efficient as electric resistance heat at that temperature.
How much does the Invertercool COH17S-36AD cost to run per year?: At its rated efficiency it costs about $870-$2,430 a year in electricity in large U.S. cities, depending on climate and local rates - for example $1,087 in Phoenix and $2,041 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 Invertercool COH17S-36AD?: ENERGY STAR lists 2 certified combinations for this outdoor unit. The highest-rated ones use CVEED-24BE, CVEED-36BE.
What refrigerant does the Invertercool COH17S-36AD use?: It uses R-32.

Running cost and savings

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

Heat pump $1,086/yrYou save $677/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 Invertercool COH17S-36AD

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: $1,086
Current system, per year: $1,763
You save per year: $677
Payback: 19.2 years
Net after 10 years: -$6,226

Cooling $651Heating $435Electricity used: 6,787 kWhSaved vs. a minimum-efficiency heat pump: $267

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

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UTL UCHA-36HDCT · cold climate18.5 SEER2 · 9.0 HSPF2
TOSOT TUD36-36W2/NHG-D(U)18.5 SEER2 · 8.5 HSPF2
ECOER EODA18H-2436BAA · cold climate18.5 SEER2 · 9.0 HSPF2
Samsung AC036BXUPCH · cold climate18.5 SEER2 · 8.4 HSPF2
VillaTherm VHP-UCHA-36HDCT-A · cold climate18.5 SEER2 · 10.0 HSPF2
GREE WLUD36W2/NHG-D(U)18.5 SEER2 · 8.3 HSPF2

See all 302 3 ton central heat pumps, ranked

Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), certification of July 7, 2026. How we use the data.