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AirGreen × CANAIR · 4C28 series · R-454BThe CanAir wall unit built for JanuarySold and installed by AirGreen in Montreal, Laval, Longueuil and on the South and North Shores.
The full CanAir rangeCanAir · 4C28 wall unit · R-454B
Built for January: -30 °C in all five sizes.
Five wall units from 9,000 to 33,000 BTU/h, all ENERGY STAR cold climate certified. At -15 °C, the 24,000 still puts out 24,200 BTU/h: more than the 24,000 in its name.
Updated October 27, 2026 · CanAir brochure, ENERGY STAR, NEEP and Hydro-Québec’s LogisVert list
-30 °Cheating on all 5 sizes, per the CanAir brochure
24,200BTU/h at -15 °C for the 24,000, per CanAir
13.5HSPF2 of the 24,000: the highest of our 22 CanAir wall units
$3,840indicative LogisVert for the 33,000, Hydro-Québec list of Oct. 27, 2026
This page answers
For anyone who wants a wall unit to heat a room all winter, and wants to know what each 4C28 really delivers at -8, -15 or -30 °C.
On this page
The CanAir shop · 4C28
All five 4C28 wall units, right below.
From 9,000 to 33,000 BTU/h. Each page lists the AHRI number and the indicative LogisVert amount.
01 · The coldest night
Slide down to -30 °C: here is what each 4C28 still delivers.
Four published test points per size, from 8.3 °C to -30 °C. No invented curve between them: you see the published figures, as they are.
Wall unit size
Outdoor temperature
8.3 °C47 °F-8 °C17 °F-15 °C5 °F-30 °C-22 °F
The size you pickedThe other sizes
—
Maximum output published by NEEP for each certified (AHRI) combination, read October 27, 2026. COPs are measured at that maximum output. Baseboard heat gives 1 kWh of heat per kWh.
02 · The five sizes
Five sizes, one promise: heat down to -30 °C.
Everything that sets one 4C28 apart from another, on one line. Each LogisVert amount links to the product page.
| Size | Outdoor / indoor | AHRI | SEER2 | HSPF2 IV / V | Heat at -15 °C | Indoor min. | Max. piping | LogisVert |
|---|---|---|---|---|---|---|---|---|
| 9,000 BTU/h | 4C28SCH09H21 4C28SEH09H21 | 215449717 | 27.4 | 12.5 / 9.5 | 11,500 BTU/h | 20.5 dB(A) | 82 ft | No amount |
| 12,000 BTU/h | 4C28SCH12H21 4C28SEH12H21 | 215449718 | 25.4 | 10.5 / 8.0 | 11,500 BTU/h | 22.0 dB(A) | 82 ft | $1,440 |
| 18,000 BTU/h | 4C28SCH18H21 4C28SEH18H21 | 215449719 | 21.4 | 11.0 / 8.5 | 18,000 BTU/h | 31.5 dB(A) | 98.4 ft | $2,160 |
| 24,000 BTU/h | 4C28SCH24H21 4C28SEH24H21 | 215449720 | 21.0 | 13.5 / 9.8 | 24,200 BTU/h | 27.0 dB(A) | 164 ft | $2,664 |
| 33,000 BTU/h | 4C28SCH33H21 4C28SEH33H21 | 215449723 | 19.5 | 10.5 / 8.6 | 35,000 BTU/h | 35.5 dB(A) | 164 ft | $3,840 |
Models, SEER2, HSPF2 (region IV, the reference; region V, colder), heat at -15 °C, sound and piping: CanAir 4C35-28-25 brochure (version 2026-10-05), p. 11. All 208/230 V. LogisVert: Hydro-Québec list of Oct. 27, 2026.
13.5 HSPF2: the 24,000
The highest seasonal heating efficiency of our 22 CanAir wall units, in region IV. In region V, the coldest: 9.8.
35,000 BTU/h at -15 °C: the 33,000
In deep cold, the biggest 4C28 puts out more than the 33,000 in its name, per the brochure. At -30 °C, NEEP still credits it with 20,700 BTU/h.
20.5 dB(A): the 9,000 at low speed
Indoor unit sound, the quietest of the series per the CanAir brochure. The 12,000 follows at 22.
03 · Performance Plus
A -30 °C 4C28 is identified by its outdoor unit.
Before you sign, here or anywhere else, check one thing: the outdoor unit’s model.
Check the outdoor model on your quote
Type the outdoor unit’s model number (it is on the quote, or on the unit’s label). We tell you how cold it heats.
Example: 4C28SCH24H21.
The catalogue trap
Same indoor head, two outdoor units.
CanAir’s 2026 brochure lists two 4C28 lines: Performance Plus (-30 °C) and Essential Plus (-25 °C). The indoor units carry the same number. The outdoor unit makes the difference.
Indoor head, both lines4C28SEH…
Performance Plus outdoor, -30 °C4C28SCH…
Essential Plus outdoor, -25 °C4C25SCH…
| Size | Performance Plus | Essential Plus | Heats down to | SEER2 | HSPF2 IV |
|---|---|---|---|---|---|
| 9,000 BTU/h | 4C28SCH09H21 | 4C25SCH… | -30 °C / -25 °C | 27.4 / 25.8 | 12.5 / 12.5 |
| 12,000 BTU/h | 4C28SCH12H21 | 4C25SCH… | -30 °C / -25 °C | 25.4 / 25.5 | 10.5 / 10.6 |
| 18,000 BTU/h | 4C28SCH18H21 | 4C25SCH… | -30 °C / -25 °C | 21.4 / 23.5 | 11.0 / 10.8 |
| 24,000 BTU/h | 4C28SCH24H21 | 4C25SCH… | -30 °C / -25 °C | 21.0 / 23.0 | 13.5 / 11.7 |
CanAir 4C35-28-25 brochure (version 2026-10-05), p. 11 (Performance Plus) and p. 12 (Essential Plus). A quirk: in 12,000, 18,000 and 24,000, Essential Plus shows a higher SEER2; Performance Plus heats colder. AirGreen sells Performance Plus.
04 · LogisVert
From $1,440 to $3,840, with the math.
$120 per 1,000 BTU/h of output at -8 °C, for an ENERGY STAR cold-climate heat pump. All five 4C28 units qualify as such; the 9,000 falls under the 12,000 BTU/h minimum.
Enter the installation date: we work out the LogisVert application deadline (9 months).
Amounts: Hydro-Québec LogisVert list of October 27, 2026 (owner, existing home), identical to the October 8 list. Rules: LogisVert residential participation guide, version 1.10, September 15, 2026 (rate, 12,000 BTU/h minimum, 9 months, 100% of pre-tax cost cap). Hydro-Québec confirms the amount when you apply.
05 · Wi-Fi
Your phone as the remote, if you want it.
Two ways to add Wi-Fi to a 4C28. Both are optional.
Optional
USB key for Wi-Fi control
Optional, per the brochure. With the app, you set the temperature and mode from your phone.
Optional
KJR-120N Wi-Fi wired controller
A wired wall controller (model KJR-120N(X6W)/BGEF, part 17317100A41107). CanAir lists it as compatible with the 4C35, 4C28 and 4C25 wall units, and with the 4CDH central system.
The NetHome Plus app
It is the app the brochure pairs with the 4C28’s Wi-Fi control, with either option.
CanAir 4C35-28-25 brochure (version 2026-10-05), p. 8 and the Wi-Fi controller page. Wi-Fi is not standard; we discuss it at the quote.
06 · Our installs
Four 4C28 units installed in Montérégie this summer.
Saint-Césaire, Saint-Mathias-sur-Richelieu, Saint-Paul-d’Abbotsford, Sainte-Angèle-de-Monnoir: each install has its article and photos.
Sept. 9, 20264C28 wall unit in Saint-Césaire
Aug. 18, 202624,000 BTU 4C28 in Saint-Mathias-sur-Richelieu
Aug. 12, 20264C28 wall unit in Saint-Paul-d’Abbotsford
Aug. 6, 20264C28 wall unit in Sainte-Angèle-de-Monnoir
Photos and articles: AirGreen’s installation blog.
07 · Questions
What people ask us about the 4C28.
How cold can the 4C28 heat?
Down to -30 °C, in all five sizes: CanAir publishes a heating range of -30 °C to 24 °C.
What does a 4C28 deliver at -30 °C?
Per NEEP: 5,100 BTU/h for the 9,000, 5,900 for the 12,000, 8,000 for the 18,000, 11,900 for the 24,000 and 20,700 for the 33,000. The right size for your room is worked out on site, by comparing its heat loss with these figures.
How much does LogisVert pay for a 4C28?
$1,440 for the 12,000, $2,160 for the 18,000, $2,664 for the 24,000 and $3,840 for the 33,000, per Hydro-Québec’s list of October 27, 2026. The 9,000 has no amount: it is under the required 12,000 BTU/h.
How do I make sure I get the -30 °C version?
Look at the outdoor model: 4C28SCH for Performance Plus (-30 °C). Essential Plus uses the same indoor heads with a 4C25SCH outdoor unit (-25 °C). Our 4C28 units are Performance Plus.
Is the 4C28 ENERGY STAR certified?
Yes: all five sizes are ENERGY STAR certified, all of them cold climate.
Is Wi-Fi included?
No, it is optional per the CanAir brochure: a Wi-Fi USB key or the KJR-120N Wi-Fi wired controller. We discuss it at the quote.
4C28 or C28: which one?
Both heat down to -30 °C (the C28 only from 9,000 to 24,000). The 4C28 runs on R-454B, the C28 on R-410A. The C28 9,000 keeps the highest SEER2 (28.1); the 4C28 24,000 has the best HSPF2 (13.5).
What is the warranty?
For residential systems sold since October 5, 2026: 10 years on the compressor and parts, and 6 years of limited labour for a residential install in Quebec, per CanAir’s base warranty. Keep your maintenance records.
AirGreen · Air conditioning & heating
Your 4C28, sized for your room and for January.
We come and see the room, compare what it loses in deep cold with each size’s figures, and hand you a clear quote with the AHRI number and the indicative LogisVert amount.
RBQ 5645-9605-01Subclasses 15.8, 15.10 and 16
Free estimateAt home, no commitment
LogisVert checkedBy AHRI number, on Hydro-Québec’s list
Showroom1370 Joliot-Curie St., Suite 712, Boucherville
Heads-up: Hydro-Québec does not solicit anyone by phone or door to door for LogisVert. If a call “from Hydro-Québec” tries to sell you a heat pump, hang up.
Sources checked on October 27, 2026
- CanAir 4C35-28-25 wall heat pump brochure (version 2026-10-05), pp. 8, 11, 12.
- NEEP cold-climate air-source heat pump list (ashp.neep.org), read October 27, 2026.
- ENERGY STAR, Certified Air-Source Heat Pumps, dataset w7cv-9xjt, read Oct. 8, 2026.
- Hydro-Québec, LogisVert eligible heat pump list (owner, existing home), file of October 27, 2026.
- LogisVert residential participation guide, version 1.10, September 15, 2026.
- CanAir base warranty 2026-10-05 (consumer) and 4-year extended labour warranty 2026-10-05.
- airgreen.ca product pages, Oct. 27, 2026.
- AirGreen installation blog.
LogisVert amounts are indicative: Hydro-Québec confirms them when you apply. Prices on quote; free in-home estimate.