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AirGreen × CANAIR · 4C22 series · R-454BCanAir’s compact wall unit, by night and by daySold and installed by AirGreen in Montreal, Laval, Longueuil and on the South and North Shores.
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CanAir · 4C22 wall unit · R-454B

Turned down low: the 4C22 goes as quiet as 17.5 dB(A).

Five compact wall units from 9,000 to 18,000 BTU/h, on R-454B, two of them on 115 V. In silent speed, the 12,000 115 V is rated at 17.5 dB(A), per the CanAir brochure.

Try the night modeBook my free estimate

Updated October 27, 2026 · CanAir 4C22 brochure, ENERGY STAR, NEEP and Hydro-Québec’s LogisVert list

zz17.5dB(A)silent speed, 12,000 · 115 V
17.5dB(A) indoors, 12,000 · 115 V in silent speed, per CanAir
52.5dB(A) outdoors for the 9,000 · 115 V: the quietest outdoor unit in the CanAir wall-unit brochures
-15 °Cheating, on all 5 models, per the brochure table
$996–$1,680indicative LogisVert with the “-P” indoor unit, list of Oct. 27, 2026
This page answers

For anyone who wants a compact R-454B wall unit for a bedroom, an office or the shoulder seasons, and wants to know how it behaves at night, in the cold and for LogisVert.

On this page
The CanAir shop · 4C22

All five 4C22 wall units, right below.

From 9,000 to 18,000 BTU/h, on 115 V or 230 V. Each page lists the AHRI number.
01 · Night mode

Pick a size and a speed: the needle shows the published level.

The 4C22 brochure publishes five fan speeds, from turbo down to silent, with the sound level of each.

Size and voltage

Fan speed

—
—dB(A)

—

Outdoor unit—
Same unit, in turbo—
Quietest at this speed—
See this model’s page →

—

Indoor sound levels in dB(A) by speed, and the outdoor unit level: CanAir 4C22 brochure (June 2025), p. 5. Rule of thumb: 10 dB(A) more sounds about twice as loud. dB(A) is weighted to follow the ear’s sensitivity.

02 · The “-P” version

Same outdoor unit, another head: the letter P is what opens LogisVert.

On June 9, 2026, ENERGY STAR certified 4C22 indoor heads whose model ends in “-P”, all of them cold climate. With them, the 12,000 (115 V and 230 V) and the 18,000 are on Hydro-Québec’s LogisVert list. The AHRI numbers on our current product sheets are not.

Your 4C22

Current product sheet

—

Indoor unit—
LogisVert—
“-P” version

—

Indoor unit—
LogisVert—
Indicative LogisVert amount
—

—

See this model’s page →

Who decides: the AHRI number on your invoice. We confirm with the distributor which version is delivered (with or without “-P”) and write it on the quote. The 9,000 has no amount either way: it is under the 12,000 BTU/h minimum.

Amounts and -8 °C outputs: Hydro-Québec LogisVert list of October 27, 2026 (identical to the October 8 list). “-P” certification: ENERGY STAR, read Oct. 8, 2026. Rate: $120 per 1,000 BTU/h at -8 °C, LogisVert residential participation guide, version 1.10, September 15, 2026.

03 · In the cold

At -15 °C, the 4C22 gives 6,500 to 11,500 BTU/h.

A shoulder-season and backup wall unit: it heats down to -15 °C, with a COP of 1.84 to 2.15 at that temperature.

Heat at -15 °C, size by size

9,000 · 115 VCOP 1.96
6,500 BTU/h
9,000 · 230 VCOP 2.07
7,000 BTU/h
12,000 · 115 VCOP 1.84
6,600 BTU/h
12,000 · 230 VCOP 1.91
8,000 BTU/h
18,000 · 230 VCOP 2.15
11,500 BTU/h

Rated output and COP at -15 °C: CanAir 4C22 brochure (June 2025), p. 5. COP compares heat delivered with electricity used; baseboard heat gives 1.

Below -15 °C, another heat source takes over

The published heating range runs from -15 °C to 24 °C. Colder than that, your baseboards or current system heat the room. To heat all winter with the wall unit, the 4C28 goes down to -30 °C.

See the 4C28, down to -30 °C

04 · R-454B

The C22 on R-410A, the 4C22 on R-454B: same job, another gas.

The 4C22 takes over the C22’s compact sizes with a refrigerant whose global warming potential is about 4.5 times lower.

Global warming potential (GWP, 100 years)

R-410AC22 · C28
2,088
R-454B4C22 · 4C28 · 4CDH
466

÷ 4.5 when moving to R-454B

100-year GWP, IPCC Fourth Assessment Report (AR4): R-410A 2,088, R-454B 466. Refrigerant by series: CanAir brochures.

A2L

Class A2L, printed on the brochure

The 4C22 brochure prints “A2L R-454B” (p. 5). A2L means low toxicity and mildly flammable. We install it following the rules set for that class.

What changes for you

In use, nothing: the unit heats and cools the same way. The refrigerant matters mostly for the environment and for the technician who services it.

See its twin, the C22

05 · Region IV or V

Two HSPF2 figures on the brochure: region V is the colder of the two.

HSPF2 measures heating efficiency over a season. Most spec sheets give only region IV; the 4C22 brochure also publishes region V, a colder climate. Switch to compare.

HSPF2 in region IV and region V: CanAir 4C22 brochure (June 2025), p. 5. Our product pages show the region IV value.

06 · On 115 V

Two 4C22 units run on 115 V: the 9,000 and the 12,000.

Same size, two voltages. Here are the published differences, side by side. The 12,000 on 115 V is the quietest in silent speed; the 230 V keeps better heating efficiency.

9,000 BTU/h: 115 V · 230 V

4C22SCH09H11 · 4C22SCH09H21

SEER221.5 · 21.2
EER212.5 · 12.6
HSPF2 region IV9.0 · 9.1
Heat at -15 °C6,500 · 7,000
Sound, silent speed18.0 · 18.5
Outdoor sound52.5 · 53.5
Max. circuit protection (sheet)20 A · 15 A

12,000 BTU/h: 115 V · 230 V

4C22SCH12H11 · 4C22SCH12H21

SEER221.2 · 21.3
EER210.1 · 10.8
HSPF2 region IV8.7 · 9.1
Heat at -15 °C6,600 · 8,000
Sound, silent speed17.5 · 21.0
Outdoor sound54.0 · 54.0
Max. circuit protection (sheet)20 A · 15 A

Your panel decides. Choosing 115 V or 230 V mostly depends on the room and the circuit available in your electrical panel. AirGreen holds subclass 16 (electrical) of its RBQ licence 5645-9605-01: we check it during the visit.

Efficiencies, heat at -15 °C and sound: CanAir 4C22 brochure (June 2025), p. 5. Max. circuit protection: airgreen.ca product pages, Oct. 27, 2026. Values given as 115 V · 230 V.

07 · Questions

What people ask us about the 4C22.

Which 4C22 is the quietest?
The 12,000 on 115 V: 17.5 dB(A) in silent speed, per the CanAir brochure. The 9,000 115 V follows at 18.0, the 9,000 230 V at 18.5.
Does the 4C22 qualify for LogisVert?
Only with the “-P” indoor unit: $1,080 for the 12,000 115 V, $996 for the 12,000 230 V and $1,680 for the 18,000, per Hydro-Québec’s list of October 27, 2026. The 9,000 has no amount.
Why does the 12,000 on 230 V get less than the 115 V?
The amount follows the heating output certified at -8 °C: 8,300 BTU/h for the 230 V “-P”, 9,000 for the 115 V “-P”. At $120 per 1,000 BTU/h, that gives $996 and $1,080.
How cold can the 4C22 heat?
Down to -15 °C, per the CanAir brochure table. Colder than that, another heat source takes over.
How is it different from the C22?
The refrigerant: R-454B for the 4C22, R-410A for the C22. Both heat down to -15 °C. The C22 goes up to 24,000 BTU/h; the 4C22 stops at 18,000 and publishes a silent speed.
Is Wi-Fi available?
Yes, as an option: the 4C22 brochure lists Wi-Fi control as optional. We discuss it at the quote.
Is R-454B safe in a bedroom?
It is classed A2L: low toxicity, mildly flammable. The brochure states it, and we install it following the rules set for that class.
What warranty covers a 4C22?
The same CanAir base warranty as the other wall units: 10 years on the compressor and parts, and 6 years of limited labour, for a residential system sold since October 5, 2026 and installed in Quebec.
AirGreen · Air conditioning & heating

Your 4C22, chosen for the room you sleep in.

We come and see the room and the panel, choose the size and voltage with you, and hand you a clear quote with the AHRI number of the version delivered.

Book my free estimate514 316-2973
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 4C22 R-454B brochure (June 2025), p. 5.
  • ENERGY STAR, Certified Air-Source Heat Pumps, dataset w7cv-9xjt, read Oct. 8, 2026.
  • NEEP cold-climate air-source heat pump list (ashp.neep.org), read October 27, 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.
  • 100-year GWP, IPCC Fourth Assessment Report (AR4): R-410A 2,088, R-454B 466.
  • CanAir base warranty 2026-10-05 (consumer) and 4-year extended labour warranty 2026-10-05.
  • airgreen.ca product pages, Oct. 27, 2026.

LogisVert amounts are indicative: Hydro-Québec confirms them when you apply. Prices on quote; free in-home estimate.