Home / Comparisons / 12,000 BTU wall heat pumps
MIDEA28 and TCL ULTIMATE 25, figure by figure
Two 12,000 BTU wall units using R-454B, ENERGY STAR cold climate certified and offered by AirGreen. Their SEER2 and Region IV HSPF2 are close; their Region V HSPF2 and their maximum capacity in cold weather are not. This page shows every certified value, at its temperature.
MIDEA28 12,000 BTU
MSEHU-H12B-2A / MO1HS-H12B-2A · AHRI 215471381
See the product pageSame NEEP certified values: SENVILLE AURA R454B, DIRECT AIR HEAT XTREME PRO R-454B, BOSCH MAX PERFORMANCE R-454B.
ULTIMATE 25 12,000 BTU
H12SUH25XGE / H12SUH25XGC · AHRI 216506201
See the product pageOther names: no other known NEEP record with the same values.
What electricity costs, in dollars, winter and summer
AirGreen estimate for the same 12,000 BTU/h zone in Montréal, at Hydro-Québec Rate D, taxes included. Both heat pumps are calculated in exactly the same way, with the same method as on all our comparison pages; only their certified efficiencies change. Electric baseboards serve as the reference.
How this amount is calculated
- Heat to supply over the winter. A zone whose heat loss reaches 12,000 BTU/h ( kW) at −23.1 °C, Montréal’s design temperature: kW × 24 h × 4,167 degree-days ÷ (18 − (−23.1)) = kWh of heat for heating around the clock, all winter. Heating degree-days (base 18 °C) and design temperature: Natural Resources Canada, HOT2000 climate data, Montréal Intl station. With fewer hours a day (“Heating” slider), the heat is reduced in the same proportion, for the heat pump as for the baseboards: this simplification does not account for the recovery after a temperature setback.
- Electricity for heating. Heat pump: heat × 3.412 ÷ Region V HSPF2, the AHRI certificate value published by NEEP. Region V is the coldest in the standard, and its calculation includes the electric backup expected when the heat pump is no longer enough. Electric baseboards: 1 kWh of electricity for 1 kWh of heat.
- Electricity for cooling. 12,000 BTU/h ÷ SEER2 × hours per day × 60 days ÷ 1,000: the method of Hydro-Québec’s air-conditioning calculator, with the seasonal SEER2 efficiency from the AHRI certificate. The number of hours is a scenario, adjustable above from 1 to 24 h. At 24 h, the calculation assumes rated capacity all day long: this is a maximum, since a variable-speed unit slows down once the room reaches the right temperature.
- Price. Hydro-Québec Rate D in force on April 1, 2026: 7.065¢ per kWh up to 40 kWh a day, 11.142¢ beyond; the average price, 9.104¢, is the one Hydro-Québec’s calculators use. GST and QST included. The system access charge, the same with or without a heat pump, is not counted.
AirGreen method v1.1, November 9, 2026. An estimate is used to compare units under the same conditions. The actual bill depends on the house, the insulation, the settings and the use; this amount is not a promise.
Ten certified values, one pair of bars each
Each column is a measure from the AHRI certificate, taken under the same conditions for both units. Tap a column to read what it measures and what it changes for you. Each column has its own scale, starting from zero.
AHRI certified values, NEEP records 387358 (MIDEA28) and 382523 (TCL ULTIMATE 25), consulted November 9, 2026.
Below −15 °C: 500 BTU/h apart at −15 °C, 1,200 at −30 °C
NEEP certifies both units at −15 °C and at −30 °C: these two rows compare directly. TCL also publishes, outside the certificate, a maximum capacity at −25 °C; MIDEA publishes none between −15 and −30 °C. Elsewhere, the table gives the range between the two published points on either side of the temperature.
What MIDEA and TCL write in their brochures
MIDEA Canada wall-mounted systems brochure (2025-08-20), whose feature table covers the MIDEA35, 28 and 25 series together, and the TCL Ultimate 25 Series brochure (TCL_ULT_050525_1). Each line repeats what the manufacturer writes.
MIDEA28: Wi-Fi and SmartHome app, optional voice control; optional 7-day programmable wired control; optional 24 V interface; dry contact.
ULTIMATE 25: wireless remote, Wi-Fi and voice control; smart control compatible with Google Home and Alexa.
MIDEA28: fan speed adjustable from 1 to 100%; horizontal and vertical swing; “Follow Me”.
ULTIMATE 25: “Gentle Breeze”; three published airflows, from 323 to 470 CFM.
MIDEA28: automatic cleaning; removable blower wheel for deep cleaning.
ULTIMATE 25: deep self-cleaning with sterilization, through condensation, freezing, defrost and drying cycles.
MIDEA28: heating range stated down to −30 °C; capacity published at −15 °C.
ULTIMATE 25: “Extreme low temperature heating”; capacities published at −15, −25 and −30 °C.
MIDEA28: A2L leak detection sensor and A2L dispersion system.
ULTIMATE 25: Not published by the manufacturer in the brochure consulted.
MIDEA28: ECO and “Gear”, Turbo, sleep mode, silent mode, 8 °C heating, smart presence sensor.
ULTIMATE 25: the brochure details no modes beyond the gentle breeze and self-cleaning.
A feature missing from a brochure is not necessarily missing from the unit: the document simply does not mention it. Each unit’s user guide, provided with the quote, is more complete.
Five speeds from MIDEA, two limits from TCL
MIDEA publishes five levels for the MIDEA28 indoor unit, from “Silent” to “Turbo”. TCL publishes two limits, the minimum and maximum sound pressure, for the ULTIMATE 25: a speed-by-speed panel is therefore not possible.
How to read these figures. dB(A) measures a noise level as the ear perceives it: the lower the figure, the quieter the unit. Each dot is a value published by the manufacturer, from the lowest to the highest.
Why this is not a ranking. TCL refers to sound pressure; MIDEA writes “sound level” without saying pressure or power. Neither publishes the measurement distance or conditions: different method — not comparable. The MIDEA28’s 19.5 dB(A) is measured in “Silent” mode, a speed TCL does not name.
Indoor unit, in the room
All published values
Outdoor unit, outside
Published value
Measurements taken by each manufacturer using its own method: read them separately, not as a ranking.
Sources: MIDEA Canada brochure of 2025-08-20, p. 11; TCL Ultimate 25 Series brochure (TCL_ULT_050525_1).
Five inches of width, and different piping lengths
Is your wall wide enough?
Published widths: 31.30 in (MIDEA, 2025-08-20) and 36 1/4 in (TCL, TCL_ULT_050525_1). The side clearances required by each installation manual come on top; the installer confirms them on site.
Piping length
MIDEA: 24.6 ft precharged, then 0.16 oz/ft, up to 82 ft. TCL: 25 ft precharged, then 0.11 oz/ft, from 10 to 50 ft.
Indoor units to scale
Same scale for both photos. The ULTIMATE 25 is almost 5 in wider and slightly taller; the MIDEA28 is deeper (8.86 versus 7 11/16 in).
| Installation | MIDEA28 | ULTIMATE 25 |
|---|---|---|
| Maximum piping length | 82 ft | 50 ftMinimum 10 ft, according to TCL. |
| Precharged length | 24.6 ft | 25 ft |
| Additional charge beyond the precharged length | 0.16 oz/ft | 0.11 oz/ft |
| Maximum height difference | 49.2 ft | 33 ft |
| Liquid – gas diameters | 1/4 – 3/8 in | 1/4 – 3/8 in |
| Outdoor unit W × H × D, weight | 31.69 × 21.81 × 12.99 in, 72.75 lb | 34 × 23 11/16 × 13 3/4 in, 69.4 lb |
| Indoor unit W × H × D, weight | 31.30 × 11.61 × 8.86 in, 22.93 lb | 36 1/4 × 12 1/16 × 7 11/16 in, 23.1 lb |
| Electrical protectionAccording to the manufacturer | Max. fuse 15 A (MCA 15 A) | Breaker max. 20 A (MCA 12 A) |
| Dehumidification | Not published by the manufacturer. | Not published by the manufacturer. |
| Refrigerant and factory charge | R-454B, 35.27 oz | R-454B, 35.27 oz |
| Stated heating / cooling range | −30 to 24 °C / −30 to 50 °C | −30 to 30 °C / −15 to 55 °C |
The outdoor unit clearances appear in each unit’s installation manual, provided with the quote; neither brochure gives them.
What people ask us about the MIDEA28 and the ULTIMATE 25
Their HSPF2 values are equal: why does winter not cost the same?
They are equal in Region IV (10.5 and 10.5). In Region V, the coldest in the standard, the certificates give 8.0 for the MIDEA28 and 9.0 for the TCL ULTIMATE 25. Our estimate for Montréal uses Region V, hence the difference.
Which one heats more in extreme cold?
At −15 °C, NEEP certifies a maximum of 11,500 BTU/h for the MIDEA28 and 12,000 for the TCL ULTIMATE 25; at −30 °C, 5,900 and 7,100 BTU/h. The COP at full capacity is the same at −15 °C (1.80) and almost the same at −30 °C (1.25 and 1.22).
My room has a narrow wall: is there a difference?
Yes, by almost 5 in: 31.30 in wide for the MIDEA28, 36 1/4 in for the TCL ULTIMATE 25. The “Is your wall wide enough?” slider shows both to scale; the required side clearances come on top.
My heat pump will be far from the room: which one accepts the longest piping?
MIDEA publishes a maximum of 82 ft for the MIDEA28 and TCL 50 ft for the ULTIMATE 25, with a maximum height difference of 49.2 and 33 ft.
Does the MIDEA28 have other names?
At 12,000 BTU, the NEEP records of the SENVILLE AURA R454B, the DIRECT AIR HEAT XTREME PRO R-454B and the BOSCH Climate 5000 MAX PERFORMANCE R-454B carry the same certified values as the MIDEA28. The indoor unit, remote control and warranty must be checked for each name.
Which one is quieter?
MIDEA publishes 19.5 to 47 dB(A) for the MIDEA28; TCL publishes 32 to 46 dB(A) of sound pressure for the ULTIMATE 25. The methods are not published in the same way: these figures do not rank them.
Are they eligible for grants?
Eligibility depends on the official list in force on the date of purchase. This page promises no amount; the current list is checked at the time of the quote.
AHRI certificates 215471381 and 216506201, line by line
| Certified value | MIDEA28 | ULTIMATE 25 |
|---|---|---|
| Cooling | ||
| Rated capacity at 35 °C | 12,000 BTU/h | 12,000 BTU/h |
| SEER2 | 25.4 | 25.0 |
| EER2 | 13.4 | 14.0 |
| Heating, same conditions | ||
| HSPF2 Region IV | 10.5 | 10.5 |
| HSPF2 Region V | 8.0 | 9.0 |
| 8.3 °C: min. / rated / max.BTU/h | 3,800 / 12,000 / 16,000 | 3,200 / 12,000 / 18,400 |
| 8.3 °C: COP min. / rated / max. | 4.84 / 3.74 / 3.35 | 4.08 / 4.00 / 2.84 |
| −8.3 °C: min. / rated / max.BTU/h | 5,300 / 12,000 / 12,800 | 6,000 / 12,000 / 15,300 |
| −8.3 °C: COP min. / rated / max. | 2.22 / 2.51 / 1.75 | 3.20 / 3.01 / 2.04 |
| −15 °C: min. / rated / max.BTU/h | 4,100 / 11,500 / 11,500 | 6,300 / 12,000 / 12,000 |
| −15 °C: COP min. / rated / max. | 1.72 / 1.80 / 1.80 | 1.79 / 1.80 / 1.80 |
| −30 °C (−22 °F): same temperature for both | ||
| −30 °C: capacity min. / max.BTU/h | 2,000 / 5,900 | 5,000 / 7,100 |
| −30 °C: COP min. / max. | 1.17 / 1.25 | 1.22 / 1.22 |
| Listings and refrigerant | ||
| ENERGY STAR / cold climate (NEEP) | Yes / Yes | Yes / Yes |
| ENERGY STAR directory, markets listed | United States, Canada | United States, Canada |
| AHRI certificate · NEEP record | 215471381 · 387358 | 216506201 · 382523 |
| RefrigerantGWP according to the IPCC (AR4); ASHRAE 34 class | R-454B · GWP 466 · A2L | R-454B · GWP 466 · A2L |
higher marks the higher value of the same measure, under the same conditions. It is not a recommendation. Capacities and COPs by point are not highlighted: the order changes depending on the point read.
The MIDEA28 and the TCL ULTIMATE 25 are both on the AirGreen website.
To choose between the MIDEA28 and the ULTIMATE 25, talk to our team: bring the room dimensions, the width of the planned wall, the distance to the outdoor location and your current heating.
Where the MIDEA28 and TCL ULTIMATE 25 figures come from
Data verified November 9, 2026. Performance: AHRI certificates and the NEEP database. Dimensions, sound, piping and features: according to the manufacturer. When a source contradicts the AHRI certificate, the certificate prevails.
Trademarks. MIDEA, MIDEA28, TCL and ULTIMATE 25 are trademarks of their respective owners. Logos are used only to identify the products compared. AirGreen is a dealer for both brands; this page is not produced, sponsored or endorsed by the manufacturers.
Photos: AirGreen and manufacturers, for identification.
Does a figure look wrong to you? Write to us: every reported figure is checked again.