Heat Pump List
Menu

Sections

Tools

TW12HAY32A1DO

TW12HAY32A1DO is in the certified data.

Its certified full-speed heating output at 5°F is 10,000–12,200 Btu/h, 83–100% of its 47°F rating (tests at different compressor speeds), depending on the pairing.

Tosot · mini-split heat pump

TW12HAY32A1DO is in the certified data as of Sep 19, 2026. TW12HAY32A1DO changed its certified SEER2 on AHRI certificate 215405583 from 28.0 to 29.5 in the certified data between June 2025 and August 2025.

6 certified pairings with 5 different figures. See all

Heating at 47°F

12,000

10,300 at 17°F

10,000 at 5°F

Btu/h, certified

1.90 COP at 5°F

Cooling at 95°F

12,000

Btu/h, certified

EER2 13.0 at 95°F

SEER2 23.0

Heating and cooling by outdoor temperature

Certified heating at 5, 17, and 47°F and cooling at 95°F for TW12HAY32A1DO, by outdoor temperature Heating: 10,000 Btu/h at 5°F, 10,300 Btu/h at 17°F, 12,000 Btu/h at 47°F. Cooling: 12,000 Btu/h at 95°F. The bars start at zero. Median of 1-ton mini-split models: 9,200 Btu/h at 5°F, 9,800 Btu/h at 17°F, 12,000 Btu/h at 47°F, 12,000 Btu/h at 95°F. 0 2,500 5,000 7,500 10,000 12,500 Btu/h 10,000 5°F 10,300 17°F 12,000 47°F 12,000 95°F Outdoor temperature (°F)
  • Heating output
  • Cooling output
  • Median of 1-ton mini-split models
  • Example heating load
  • Example cooling load
  • Frosting range, 17 to 45°F

This pairing delivers 12,000 Btu/h of heat at 47°F, 10,300 Btu/h at 17°F, and 10,000 Btu/h at 5°F, 83% of its 47°F rating. It delivers 12,000 Btu/h of cooling at 95°F. At 5°F that is 1,000 Btu/h above the example heating load of 9,000 Btu/h; at 95°F it is 7,000 Btu/h above the example cooling load of 5,000 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 mini-split 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 400 sq ft where winters reach 5°F: heating runs from 9,000 Btu/h at 5°F to 0 at 65°F, and cooling runs from 0 at 65°F to 5,000 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

AHRI certificate 217575564 · listed by TOSOT · certified May 28, 2026 · 2 pairings share these values

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 mini-split 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 10,0002.93 kW +9% 1.90
17°Ffull speed 10,3003.02 kW +5% NR
47°Fnormal speed 12,0003.52 kW 0% NR
95°Fcooling, full load 12,0003.52 kW — NR

EER2 13.0 in that test. SEER2 23.0 over the modeled cooling season.

Power use at each temperature

Electrical input in the 5°F full-speed test
1.54kW
Electrical input in the 95°F cooling test
0.92kW
Seasonal average heating COP
2.49

These exclude backup resistance heat.

Updated Sep 19, 2026 · Methodology

How it compares with other 12,000 Btu heat pumps

1-ton mini-split models

This pairing at 5°F
10,000 Btu/h
This unit at 5°F median across its pairings
10,000 Btu/h
Median of 1-ton mini-split models at 5°F
9,200 Btu/h
Models in this group
888

This unit is above 60% of them, at number 359 of 888 by heat at 5°F. The middle half of the group runs 8,400 to 11,300 Btu/h.

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

Closest models by heat at 5°F

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

Certified values for TW12HAY32A1DO

6 pairings · 6 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 12,000 Btu/h 12,000–12,200 Btu/h
Heat output at 17°F full speed 10,300 Btu/h 10,300 Btu/h
Heat output at 5°F full speed 10,000 Btu/h 10,000–12,200 Btu/h
Heat output below 5°F NR NR
Cold output 5°F output as a % of the 47°F rating 83%
COP at 5°F full speed 1.90 1.80–2.00
HSPF2 Region IV 8.5 8.5–10.0
Cooling
Cooling capacity at 95°F full-load test 12,000 Btu/h 12,000 Btu/h
EER2 at 95°F 13.0 12.3–15.2
SEER2 cooling season 23.0 20.0–29.5
Cooling at other temperatures NR NR
Equipment and listing
Refrigerant R-32
Compressor Variable speed
Indoor unit TM12HE32KDI 6 indoor units
FurnaceNo furnace None
Cold-climate designation EPA's designation, as published Yes On every pairing
ENERGY STAR Most Efficient EPA's designation, as published Yes On every pairing
Where it is sold US and Canada US and Canada
Model string as certified TW12HAY32A1DO

Pairings, by indoor-unit class

6 indoor units · 6 certified pairings

One row per indoor unit certified with this outdoor unit.

Ductless indoor · 6 indoor units

  1. TM12HA32EDI TOSOT 10,000 Btu/hat 5°F, full speed

    1 pairing · 47°F 12,000 Btu/h · 95°F cooling 12,000 Btu/h · Cold output 83% · COP 1.80

  2. TM12HC32TDI TOSOT 10,000 Btu/hat 5°F, full speed

    1 pairing · 47°F 12,000 Btu/h · 95°F cooling 12,000 Btu/h · Cold output 83% · COP 1.90

  3. TM12HD32KDI TOSOT 10,000 Btu/hat 5°F, full speed

    1 pairing · 47°F 12,000 Btu/h · 95°F cooling 12,000 Btu/h · Cold output 83% · COP 1.90

  4. TM12HE32KDI TOSOT 10,000 Btu/hat 5°F, full speed

    1 pairing · 47°F 12,000 Btu/h · 95°F cooling 12,000 Btu/h · Cold output 83% · COP 1.90

  5. TM12HS32FDI TOSOT 10,500 Btu/hat 5°F, full speed

    1 pairing · 47°F 12,000 Btu/h · 95°F cooling 12,000 Btu/h · Cold output 88% · COP 1.90

  6. TW12HAY32A1DI TOSOT 12,200 Btu/hat 5°F, full speed

    1 pairing · 47°F 12,200 Btu/h · 95°F cooling 12,000 Btu/h · Cold output 100% · COP 2.00

Indoor units in the ductless indoor 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
TM12HA32EDI TOSOT 10,000 12,000 12,000 83% 1.80 Yes 1
TM12HC32TDI TOSOT 10,000 12,000 12,000 83% 1.90 Yes 1
TM12HD32KDI TOSOT 10,000 12,000 12,000 83% 1.90 Yes 1
TM12HE32KDI TOSOT 10,000 12,000 12,000 83% 1.90 Yes 1
TM12HS32FDI TOSOT 10,500 12,000 12,000 88% 1.90 Yes 1
TW12HAY32A1DI TOSOT 12,200 12,200 12,000 100% 2.00 Yes 1

The share is heat output at 5°F divided by the 47°F rating.

Showing 6 of 6 indoor units

Sold as, and units with identical certified values

Brands listing this model number

Model number as listed

  • TW12HAY32A1DO 6 pairings

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

  • TW12HAY32A1DO changed its certified SEER2 on AHRI certificate 215405583 from 28.0 to 29.5 in the certified data between June 2025 and August 2025.
  • TW12HAY32A1DO changed its certified heat output at 17°F on AHRI certificate 215405583 from 7,000 Btu/h to 10,300 Btu/h in the certified data between March 2025 and May 2025.
  • TW12HAY32A1DO was in the certified data by September 2024.

History and definitions

History

First certified record
Most recent certified record
Measurements reported
May 28, 2026
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, “TW12HAY32A1DO — certified heat output”. Certified figures dated , checked daily.
https://heatpumplist.com/model/tw12hay32a1do