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DIRECT AIR HEAT XTREME PRO R-454B and CANAIR 4C28 in 2 zones: the same certified values
Two different AHRI certificates, two names, two model numbers. On the NEEP list, however, every value is identical: SEER2 25.0, HSPF2 10.4 and 8.5, and the same capacity at every test temperature, down to 10,000 BTU/h at −30 °C. This page shows what is the same, what is not, and what each manufacturer publishes.
HEAT XTREME PRO R-454B, 2 zones
DIRM4-18HXPRO28-2Z · AHRI 215213799 · NEEP 392066
Diagram, not a photo: DIRECT AIR publishes no image and no document for this R-454B multi-zone system.
Contact us about this system
4C28 R-454B, 2 zones
4C28MC318H21 + 2 × 4C28SEH09H21 · AHRI 215449724 · NEEP 387521
See the product pageAlso with the same AHRI and NEEP certified values: MIDEA, MIDEA28 multi (MO3HX-H18B-2A, AHRI 215471457, NEEP 387282), compared with the ELIOS e-MULTI on another page.
What the electricity costs, in dollars, winter and summer
AirGreen estimate for the same 19,000 BTU/h zone in Montréal, at Hydro-Québec rate D, taxes included: this is the cooling capacity given by both certificates. Both systems have the same HSPF2 region V (8.5) and the same SEER2 (25.0): calculated with the same method as on all our comparison pages, they therefore give the same estimate. Electric baseboards serve as the reference point.
How this amount is calculated
- Heat needed over the winter. A zone whose heat loss reaches 19,000 BTU/h ( kW) at −23.1 °C, the Montréal design temperature: kW × 24 h × 4,167 degree-days ÷ (18 − (−23.1)) = kWh of heat for 24-hour heating, all winter. Heating degree-days (base 18 °C) and design temperature: Natural Resources Canada, HOT2000 climate data, Montréal Intl station. With fewer hours per day (“Heating” slider), heat is reduced in the same proportion, for the heat pump as for the baseboards: this is a simplification that ignores the recovery after a temperature setback.
- Electricity for heating. Heat pump: heat × 3.412 ÷ HSPF2 region V, the AHRI certificate value published by NEEP. Region V is the coldest in the standard, and its calculation includes the electric backup planned for when the heat pump is no longer enough. Electric baseboards: 1 kWh of electricity for 1 kWh of heat.
- Electricity for cooling. 19,000 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: that is a maximum, since a variable-speed unit slows down once the room is at the right temperature.
- Price. Hydro-Québec rate D in force on April 1, 2026: 7.065 ¢ per kWh up to 40 kWh per day, 11.142 ¢ beyond; the average price, 9.104 ¢, is the one Hydro-Québec’s calculators use. GST and QST included. Network access charges, the same with or without a heat pump, are 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.
The two NEEP listings, laid one on top of the other
On the left, the DIRECT AIR NEEP listing; on the right, the CANAIR one. Drag the slider: the CANAIR listing comes to rest on the first. Each line then shows whether the two values are identical or different.
Same values does not mean same documents. CANAIR publishes a complete brochure for this system; for the R-454B multi-zone version of the HEAT XTREME PRO, we found no DIRECT AIR document. The next section details what differs.
Heating values: minimum / rated / maximum capacity in BTU/h, then COP, at 21.1 °C indoors. NEEP listings 392066 and 387521, consulted November 9, 2026. Both listings are in the “Multizone All Non-Ducted” category (ductless heads).
Two names, two certificates, two ways of documenting
The certified values are the same. The rest is not: the numbers, the published documents, and what is known about the heads and the installation.
DIRECT AIR: AHRI 215213799, NEEP series “DIRM Series”.
CANAIR: AHRI 215449724, NEEP series “4C22 Series”.
DIRECT AIR: DIRM4-18HXPRO28-2Z.
CANAIR: 4C28MC318H21, 1 to 3 zones according to CANAIR.
DIRECT AIR: the NEEP listing names no head; no DIRECT AIR document states which heads come with this system.
CANAIR: 4C28SEH09H21 wall head, with published sound, airflow and dimensions.
DIRECT AIR: the manufacturer’s website presents the July 2022 HEAT XTREME PRO brochure, which describes the R-410A version (DIRM- models). Nothing for the R-454B DIRM4- version.
CANAIR: 4C28 R-454B brochure of June 2025: features, ranges, piping, dimensions, sound.
DIRECT AIR: Not published by the manufacturer for this R-454B system; the coldest NEEP point is at −30 °C.
CANAIR: from −30 to 24 °C outdoors.
Neither is compared here. The warranty documents for the chosen system come with the quote.
Below −15 °C: the same certified points, at the same temperature
NEEP publishes the same two points for both systems: 19,000 BTU/h at −15 °C (COP 2.00) and 10,000 BTU/h at −30 °C (COP 1.30). Between these two temperatures, NEEP publishes no point: at −20 and −25 °C, each cell gives the range between these two points.
Features, sound and measurements published by CANAIR
CANAIR 4C28 R-454B brochure (June 2025), 4C28SEH09H21 wall head and 4C28MC318H21 outdoor unit. For the DIRECT AIR R-454B multi-zone, every feature has to be confirmed with the distributor at quote time: the manufacturer publishes none.
Heating from −30 to 24 °C; heating cables at the base of the outdoor unit and around the compressor.
From −30 to 50 °C outdoors.
A2L detection: the head displays code EC and stops.
Turbo, quiet mode, “Follow Me”; cold-draft prevention at start-up.
Wi-Fi optional; automatic restart with the last settings.
“Auto-clean”, which dries the indoor and outdoor coils.
One 9,000 BTU head, in the room
Cooling, speeds published by CANAIR
Outdoor unit, outdoors
Value published by CANAIR
dB(A) measures a noise level as the ear perceives it: the lower the number, the quieter the unit. CANAIR does not state the measuring method and does not publish the Turbo speed. DIRECT AIR publishes no sound level for this R-454B system.
On the wall, outdoors, in the piping
CANAIR wall head
Width × height × depth, 23.37 lb, according to the CANAIR brochure. DIRECT AIR head: Not published by the manufacturer.
CANAIR outdoor unit
37.24 × 31.89 × 16.14 in · 137.35 lb
Photo: AirGreen image of the unit sold. MIDEA publishes the same dimensions for the MO3HX-H18B-2A (37 1/4 × 31 7/8 × 16 1/8 in).
| Installation | HEAT XTREME PRO R-454B | 4C28 |
|---|---|---|
| Maximum piping length | Not published by the manufacturer | 98.4 ftCANAIR does not say whether this is the total or one line; for the MIDEA28 multi, with the same certified values, MIDEA publishes 197 ft in total and 98 ft per head. |
| Precharged length | Not published by the manufacturer | 74 ft78.31 oz charged; 0.16 oz/ft beyond. |
| Maximum height difference | Not published by the manufacturer | 49.2 ft |
| Liquid – gas diameters | Not published by the manufacturer | 1/4 – 3/8 in, one pair per headThree pairs of connections (1 to 3 zones). |
| Outdoor unit W × H × D, weight | Not published by the manufacturer | 37.24 × 31.89 × 16.14 in, 137.35 lb |
| Electrical protectionAccording to the manufacturer | Not published by the manufacturer | 20 A fuse maximum (MCA 17.5 A) |
| Advertised heating / cooling range | Not published by the manufacturer | −30 to 24 °C / −30 to 50 °C |
Sources: CANAIR 4C28 R-454B brochure (June 2025, p. 5 and 7); MIDEA MO3HX-H18B-2A submittal for the note on length and dimensions. Clearances around the outdoor unit are in the installation manual; the installer confirms them on site.
What people ask us about these two systems
Are these two systems made by the same company?
No document we consulted says so, and we do not claim it. What can be checked: NEEP listings 392066 and 387521 give exactly the same certified values at every test temperature. The MIDEA28 multi (MO3HX-H18B-2A) has these same values too.
If the values are the same, what can change?
The indoor heads, the remote, the app, the documents supplied, the warranty and the distributor’s support. The certificates only describe the system’s performance under test conditions.
Isn’t the HEAT XTREME PRO advertised down to −35 °C?
That range appears in the July 2022 HEAT XTREME PRO brochure, which describes the R-410A version (DIRM- models). For the R-454B multi-zone version (DIRM4-), DIRECT AIR publishes no range; the coldest NEEP point is at −30 °C, with 10,000 BTU/h.
Why does this page compare only R-454B systems?
Our comparison pages cover systems using today’s refrigerants, classified A2L. Both systems on this page use R-454B, with a GWP of 466 according to the IPCC (AR4).
Why does the cost estimate use 19,000 BTU/h?
It is the rated cooling capacity given by both certificates. Since the HSPF2 region V (8.5) and SEER2 (25.0) are the same, the estimate is the same for both as well.
Are these systems eligible for rebates?
Eligibility depends on the official lists in force on the date of purchase, such as Hydro-Québec’s LogisVert list. We check the chosen system at quote time; no amount is promised on this page.
All AHRI and NEEP values
| Certified value | HEAT XTREME PRO R-454B | 4C28 |
|---|---|---|
| Cooling | ||
| Rated capacity at 35 °C | 19,000 BTU/h | 19,000 BTU/h |
| SEER2 | 25.0 | 25.0 |
| EER2 | 15.0 | 15.0 |
| Heating, same conditions | ||
| HSPF2 region IV / V | 10.4 / 8.5 | 10.4 / 8.5 |
| 8.3 °C: min. / rated / max.BTU/h | 5,700 / 20,000 / 27,000 | 5,700 / 20,000 / 27,000 |
| 8.3 °C: COP min. / rated / max. | 4.77 / 3.99 / 3.44 | 4.77 / 3.99 / 3.44 |
| −8.3 °C: min. / rated / max.BTU/h | 3,800 / 20,000 / 20,000 | 3,800 / 20,000 / 20,000 |
| −8.3 °C: COP min. / rated / max. | 2.78 / 2.53 / 2.53 | 2.78 / 2.53 / 2.53 |
| −15 °C: min. / rated / max.BTU/h | 3,500 / 19,000 / 19,000 | 3,500 / 19,000 / 19,000 |
| −15 °C: COP min. / rated / max. | 2.28 / 2.00 / 2.00 | 2.28 / 2.00 / 2.00 |
| Coldest point | ||
| Test temperature | −30 °C (−22 °F) | −30 °C (−22 °F) |
| Capacity min. / max. | 3,500 / 10,000 BTU/h | 3,500 / 10,000 BTU/h |
| COP at maximum capacity | 1.30 | 1.30 |
| Certifications and refrigerant | ||
| ENERGY STAR / cold climate (NEEP) | Yes / Yes | Yes / Yes |
| AHRI certificate · NEEP listing | 215213799 · 392066Multi-zone, ductless heads | 215449724 · 387521Multi-zone, ductless heads |
| RefrigerantGWP according to the IPCC (AR4); ASHRAE 34 class | R-454B · GWP 466 · A2L | R-454B · GWP 466 · A2L |
Values are not highlighted: under equal conditions, both certificates give the same figures. Only the certificate and listing numbers differ.
Two names, same numbers: let’s talk about your two rooms.
To find out which one suits your installation, and what comes with each, bring the size of each room, the planned outdoor location and the distance to each head.
Where each number comes from
Data verified on November 9, 2026. Performance: AHRI certificates and NEEP database. Dimensions, sound, piping and features: according to the manufacturer. When a source contradicts the AHRI certificate, the certificate prevails. Identical certified values say nothing about who makes a unit: this page does not claim it.
Trademarks. DIRECT AIR, HEAT XTREME PRO, CANAIR and MIDEA are trademarks of their respective owners. Logos are used only to identify the products compared. AirGreen is a retailer of these brands; this page is not produced, sponsored or approved by the manufacturers.
Images: AirGreen photos for the CANAIR; diagram for the DIRECT AIR.
Does a data point look wrong? Write to us : every reported data point is checked again.