What is the SEER2 rating of the Capella CCB1-H24A-O?

The Capella CCB1-H24A-O is rated at up to 18.3 SEER2 and 11.7 EER2 for cooling and up to 10.0 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 7 certified matchups SEER2 ranges from 15.3-18.3.

Is the Capella CCB1-H24A-O good for cold climates?

Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 21,600 BTU/h at 5°F with a COP of 1.87, so it is still 1.9 times as efficient as electric resistance heat at that temperature.

How much does the Capella CCB1-H24A-O cost to run per year?

At its rated efficiency it costs about $615-$1,592 a year in electricity in large U.S. cities, depending on climate and local rates - for example $751 in Phoenix and $1,325 in Minneapolis. The calculator on this page works it out for your city and compares it with your current system.

Is the Capella CCB1-H24A-O the same as the Stelpro SDB1-H24A-O?

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 Capella CCB1-H24A-O?

ENERGY STAR lists 7 certified combinations for this outdoor unit. The highest-rated ones use CAHB1-H24A-I, CACB1-H24A1418-I, CACB1-H24A1718-I.

2-ton central heat pump · CAHB Series

Capella CCB1-H24A-O

Very good cooling and heating efficiency for a 2-ton central heat pump, and certified for cold climates.

Ranks #120 of 331 2 ton central heat pumps for cooling efficiency, and costs about $671 a year to run in a mixed climate like Atlanta.

SEER2: 18.3 Cooling efficiency over a season
Very good · beats 74%
HSPF2: 10.0 Heating efficiency over a season
Very good · beats 84%
EER2: 11.7 Cooling efficiency on a 95°F day
Average · beats 43%
Heat at 5°F: 21,600 BTU/h90% of its 47°F output
Below average · beats 14%

A good fit if…

You want low cooling bills - its SEER2 beats 74% of central heat pumps.
Your winters get properly cold - it is ENERGY STAR cold-climate certified, with 21,600 BTU/h at 5°F.
It will heat most of the year - its HSPF2 beats 84% of central heat pumps.
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

Specifications2 ton, R-454B

General
Brand	Capella
Also sold as	Stelpro
Outdoor unit model	CCB1-H24A-O
Series	CAHB Series
Type	Central heat pump
Nominal size	2 ton
CompressorVariable-speed units run longer at low power	Continuously variable
Refrigerant	R-454B
Connected (smart) capable	No
On the market since	October 15, 2024
Last certified	September 30, 2026
Cooling
SEER2Seasonal efficiency, higher is better	18.3 (range 15.3-18.3)
EER2Efficiency at 95°F outdoors	9.7-11.7
Cooling capacity	23,000-24,000 BTU/h
Heating
HSPF2Seasonal efficiency, higher is better	9.0-10.0
Capacity at 47°F	24,000-25,000 BTU/h
Capacity at 17°F	18,000-20,800 BTU/h
Capacity at 5°F	20,000-21,600 BTU/h
COP at 5°F2.0 = twice as efficient as a space heater	1.75-1.87
ENERGY STAR cold climate	Yes

Heating output as it gets colder90% kept at 5°F

Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with CAHB1-H24A-I at the standard test temperatures, in BTU/h:

Certified matchups7 indoor units

The same outdoor unit scores differently with each indoor unit and furnace. 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.
CAHB1-H24A-I · cold climate	-	18.3	11.7	10.0	21,600	216027662
CACB1-H24A1418-I · cold climate	C45-2-V	16.6	10.0	9.1	20,000	217618155
CACB1-H24A1718-I · cold climate	C60-2-V	16.4	10.4	9.3	20,000	217618156
CACB1-H24A1418-I · cold climate	-	16.0	10.0	9.5	21,000	216623792
CACB1-H24A1718-I · cold climate	-	16.0	10.0	9.5	21,000	216623793
CACB1-H24A1418-I · cold climate	C30-2-V	15.9	9.7	9.0	20,000	217618154
CACB1-H24A1718-I · cold climate	C75-2-V	15.3	10.1	9.1	21,000	217618157

Same unit, other model numbers1

These model numbers have exactly the same certified ratings and matchups as the Capella CCB1-H24A-O: the same equipment under another brand, or a variant code for voltage, colour or market. Everything on this page applies to them.

Stelpro SDB1-H24A-O

Yearly running cost in 10 large cities$615-$1,592

Phoenix, AZ$751/yr
Miami, FL$615/yr
Houston, TX$673/yr
Atlanta, GA$671/yr
Los Angeles, CA$651/yr
New York, NY$1,592/yr
Chicago, IL$1,290/yr
Denver, CO$1,071/yr
Seattle, WA$657/yr
Minneapolis, MN$1,325/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 Capella CCB1-H24A-O?: The Capella CCB1-H24A-O is rated at up to 18.3 SEER2 and 11.7 EER2 for cooling and up to 10.0 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 7 certified matchups SEER2 ranges from 15.3-18.3.
Is the Capella CCB1-H24A-O good for cold climates?: Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 21,600 BTU/h at 5°F with a COP of 1.87, so it is still 1.9 times as efficient as electric resistance heat at that temperature.
How much does the Capella CCB1-H24A-O cost to run per year?: At its rated efficiency it costs about $615-$1,592 a year in electricity in large U.S. cities, depending on climate and local rates - for example $751 in Phoenix and $1,325 in Minneapolis. The calculator on this page works it out for your city and compares it with your current system.
Is the Capella CCB1-H24A-O the same as the Stelpro SDB1-H24A-O?: 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 Capella CCB1-H24A-O?: ENERGY STAR lists 7 certified combinations for this outdoor unit. The highest-rated ones use CAHB1-H24A-I, CACB1-H24A1418-I, CACB1-H24A1718-I.
What refrigerant does the Capella CCB1-H24A-O 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 $742/yrYou save $512/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 Capella CCB1-H24A-O

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: $742
Current system, per year: $1,254
You save per year: $512
Payback: 17.6 years
Net after 10 years: -$3,878

Cooling $462Heating $280Electricity used: 4,635 kWhSaved vs. a minimum-efficiency heat pump: $222

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

CanAir 4CDH2024C21 · cold climate18.3 SEER2 · 10.0 HSPF2
DIRECT AIR DIRM4-24MAGICPRO20-OU · cold climate18.3 SEER2 · 10.0 HSPF2
Multi MFG HHS-24HD-B · cold climate18.3 SEER2 · 10.5 HSPF2
ECO-AIR ECUO-24H · cold climate18.3 SEER2 · 10.0 HSPF2
Comfort-Aire A-VXP24SA-1 · cold climate18.3 SEER2 · 10.5 HSPF2
KERR A-KXP24SA-1 · cold climate18.3 SEER2 · 10.0 HSPF2
Thermal Zone TZID24H520ZCS · cold climate18.4 SEER2 · 9.9 HSPF2
Panasonic CU-HM24BAHU · cold climate18.3 SEER2 · 10.0 HSPF2

See all 331 2 ton central heat pumps, ranked

Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), certification of September 30, 2026. How we use the data.