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AT2239 CA

AT2239 CA is in the certified data.

Its certified ratings are 8.3 HSPF2 and 23.9 SEER2.

Atomi Smart · central heat pump

All 4 certified Atomi Smart models

AT2239 CA is in the certified data as of Sep 19, 2026.

Heating at 47°F

12,749

6,722 at 17°F

NR at 5°F

Btu/h, certified

NR COP at 5°F

Cooling at 95°F

12,000

Btu/h, certified

EER2 13.05 at 95°F

SEER2 23.9

Heating and cooling by outdoor temperature

Certified heating at 5, 17, and 47°F and cooling at 95°F for AT2239 CA, by outdoor temperature Heating: no certified figure at 5°F, 6,722 Btu/h at 17°F, 12,749 Btu/h at 47°F. Cooling: 12,000 Btu/h at 95°F. The bars start at zero. Median of 1-ton central models: 8,200 Btu/h at 5°F, 10,200 Btu/h at 17°F, 14,200 Btu/h at 47°F, 11,600 Btu/h at 95°F. 0 5,000 10,000 15,000 Btu/h NR 5°F 6,722 17°F 12,749 47°F 12,000 95°F Outdoor temperature (°F)
  • Heating output
  • Cooling output
  • Median of 1-ton central models
  • Example heating load
  • Example cooling load
  • Frosting range, 17 to 45°F

This pairing delivers 12,749 Btu/h of heat at 47°F and 6,722 Btu/h at 17°F. It delivers 12,000 Btu/h of cooling at 95°F. At 95°F that is 8,000 Btu/h above the example cooling load of 4,000 Btu/h.

Each bar is a separate certified test, drawn at its outdoor temperature, starting at zero. The 47°F figure is at normal speed; the 17 and 5°F figures are at full speed. The short dark line on each bar is the median of 1-ton central models, one value per model. The shaded 17 to 45°F band is the frosting range: the outdoor coil can frost, and the unit pauses to defrost.

The dashed lines are example loads for a typical area of about 350 sq ft where winters reach 5°F: heating runs from 8,000 Btu/h at 5°F to 0 at 65°F, and cooling runs from 0 at 65°F to 4,000 Btu/h at 95°F, at 1,000 sq ft per ton. A house in a hot climate or with large west-facing windows can need twice as much cooling. They are examples, not your building.

Calculate heating and cooling for your house

listed by Atomi Smart · certified Dec 3, 2024 · 1 pairing carries these values

Rebates where you live

Meets the recorded equipment thresholds of 1 program in 1 states, provinces, or territories:Newfoundland and Labrador (1).

All 1 programs by state and province

Newfoundland and Labrador

Threshold comparisons use the unit’s median certified figures across its pairings, not the pairing selected above. Meeting these thresholds means the equipment may qualify; it does not guarantee approval. Service-area, installation, and product-list requirements also apply.

All rebate programs and their published thresholds

Certified output and power use

Certified output for the selected pairingThe four bars share one scale. The comparison is with the median of 1-ton central models. Heating tests run at 70°F indoors. The cooling test runs at 80°F indoors.
Outdoor temperature Certified outputBtu/h One scale vs class median COPat 5°F
5°Ffull speed NR NR NR
17°Ffull speed 6,7221.97 kW −34% NR
47°Fnormal speed 12,7493.74 kW −10% NR
95°Fcooling, full load 12,0003.52 kW — NR

EER2 13.05 in that test. SEER2 23.9 over the modeled cooling season.

Power use at each temperature

Electrical input in the 5°F full-speed test
NRkW
Electrical input in the 95°F cooling test
0.92kW
Seasonal average heating COP
2.42

These exclude backup resistance heat.

Updated Sep 19, 2026 · Methodology

How it compares with other 12,000 Btu heat pumps

1-ton central models

This pairing at 5°F
NR
This unit at 5°F median across its pairings
NR
Median of 1-ton central models at 5°F
8,200 Btu/h
Models in this group
36

This size class is defined by cooling capacity, so cooling is not compared here.

Among 12,000 Btu central models, each by its median certified pairing, highest first: HSPF2, 38th of 39 (tied). Models without that figure are left out.

Similar ratings at 47°F

These central models share the nominal cooling size. Comparisons use each model’s median certified figures across pairings.

  • ACIQ-12-EHPD: 13,000 Btu/h at 47°F (this model: 12,749); HSPF2 10.0 (this model: 8.25).
  • ACIQ-12-EHPB: 13,000 Btu/h at 47°F (this model: 12,749); HSPF2 9.0 (this model: 8.25).
  • ECO-12K: 12,000 Btu/h at 47°F (this model: 12,749); HSPF2 9.7 (this model: 8.25).

Every 12,000 Btu (1-ton) unit, ranked by cooling efficiency, then heating efficiency

Certified values for AT2239 CA

1 pairing · 0 AHRI certificates

This pairing is the one shown above. Under all pairings, a single figure means every pairing agrees and a range means the pairing decides.

This pairingAll pairings
Heating
Heat output at 47°F normal speed 12,749 Btu/h 12,749 Btu/h
Heat output at 17°F full speed 6,722 Btu/h 6,722 Btu/h
Heat output at 5°F full speed NR NR
Heat output below 5°F NR NR
Cold output 5°F output as a % of the 47°F rating NR NR
COP at 5°F full speed NR —
HSPF2 Region IV 8.3 8.3
Cooling
Cooling capacity at 95°F full-load test 12,000 Btu/h 12,000 Btu/h
EER2 at 95°F 13.05 13.05
SEER2 cooling season 23.9 23.9
Cooling at other temperatures NR NR
Equipment and listing
Refrigerant R-32
Compressor Variable speed
Indoor unit None listed None
FurnaceNo furnace None
Cold-climate designation EPA's designation, as published NC NC
ENERGY STAR Most Efficient EPA's designation, as published No On no pairings
Where it is sold Canada Canada
Model string as certified AT2239 CA

Pairings, by indoor-unit class

1 certified pairing

One row per indoor unit certified with this outdoor unit.

Unspecified

  1. None listed brand not stated NRat 5°F, full speed

    1 pairing · 47°F 12,749 Btu/h · 95°F cooling 12,000 Btu/h · Cold output NR · COP —

Indoor units in the unspecified class
Indoor unit Brand At 5°FBtu/h · full speed At 47°FBtu/h · normal speed At 95°FBtu/h · cooling Cold output% of 47°F rating COP 5°Ffull speed Cold climate Pairings
None listed — NR 12,749 12,000 NR — NC 1

The share is heat output at 5°F divided by the 47°F rating. Tests use different compressor speeds.

Sold as, and units with identical certified values

Brands listing this model number

Model number as listed

  • AT2239 CA 1 pairing

What affects the price

We don't have prices. These things drive the cost.

  • The size of the unit, and the indoor equipment on the same certificate.
  • Whether existing ductwork is reused, altered, or replaced.
  • The electrical work: a circuit, a disconnect, and sometimes a panel change.
  • Refrigerant line length and how the outdoor unit is mounted.
  • Permits and inspection, which vary by municipality.
  • Removing and disposing of the old equipment.
  • Local labor rates and how busy the season is.
  • Rebates and tax credits, which change and have deadlines.

Product history

  • AT2239 CA first appeared in the certified data between March 2025 and May 2025.

History and definitions

History

First certified record
Most recent certified record
Measurements reported
Dec 3, 2024
Status
In the certified data

Field definitions

COP
Heat delivered for each unit of electricity used. A COP of 2.5 gives 2.5 times the heat of an electric baseboard heater.
HSPF2
Heating efficiency over a typical season. Higher uses less electricity.
SEER2
Cooling efficiency over a typical season. Higher uses less electricity.
EER2
Cooling output divided by electrical input in the 95°F full-load test, in Btu/h per watt.
Cold output
Heat output at 5°F as a percentage of the 47°F rating.
% of rating at 17°F
Heat output at 17°F as a percentage of the 47°F rating.

NR not in the certified dataNC not cold-climate certifiedSP single pairing onlyVP varies by pairing; see the pairings tableWD withdrawn since the certified data was last read

Cite or print this page

Heat Pump List, “AT2239 CA — certified heat output”. Certified figures dated , checked daily.
https://heatpumplist.com/model/at2239ca