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CanAir · C28 wall unit · R-410A

The C28 9,000: SEER2 28.1, the best cooling efficiency of our 22 wall units.

Six sizes from 9,000 to 36,000 BTU/h. From 9,000 to 24,000 it heats down to -30 °C and is ENERGY STAR cold climate. The 30,000 and 36,000 stop at -15 °C: we show you the difference.

Compare efficiencyBook my free estimate

Updated October 27, 2026 · CanAir C28 brochure, ENERGY STAR and Hydro-Québec’s LogisVert list

HIGHEST SEER2, BY SERIES21.7C2221.54C2227.44C2828.1C28
28.1SEER2 of the C28 9,000, the highest of the 22 CanAir wall units
16.2EER2 of the same 9,000, measured at 35 °C outside: the highest of the 22
-30 °Cheating from 9,000 to 24,000, per the CanAir brochure
$2,544indicative LogisVert for the C28 24,000, list of Oct. 27, 2026
This page answers

For anyone who wants the wall unit that uses the least power to cool, and wants to know which C28 units really heat in winter.

On this page
The CanAir shop · C28

The 6 C28 wall units, right below.

From 9,000 to 36,000 BTU/h, all on 230 V. Each page lists the AHRI number and the indicative LogisVert amount.
01 · The comparator

Same comfort, less electricity: put the C28 up against any CanAir wall unit.

Pick a C28, then another unit from the range. For the same cooling (SEER2) or the same heating season (HSPF2), we work out the electricity saved, or added. The math is shown.

Your C28

Compared with

For

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The math—
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Ratio of published seasonal ratings, for equal use: an indication, not a bill. Real use depends on the house, the climate and the size chosen.

See this C28’s page →

SEER2 and HSPF2 (region IV): CanAir C22 (p. 7), C28 (p. 4), 4C22 (p. 5) and 4C35-28-25 (p. 11) brochures. For the same energy delivered, consumption varies inversely with the rating: 1 ÷ SEER2, 1 ÷ HSPF2. Region IV is a milder climate than Montreal, and the rating does not count the backup heat needed below -15 °C for the C22, the 4C22 and the C28 30,000 and 36,000.

02 · Two C28s in one

From 9,000 to 24,000: -30 °C. In 30,000 and 36,000: -15 °C.

Same series name, two behaviours in deep cold. The CanAir brochure says so size by size; we put it side by side.

All winter

C28 9,000, 12,000, 18,000 and 24,000

Heating-30 °C to 30 °C
ENERGY STARyes, cold climate
Heat at -15 °C10,600 to 25,000 BTU/h
SEER221.5 to 28.1
LogisVert$1,200 to $2,544 (12,000 to 24,000)
See the C28 24,000
VS
Shoulder season

C28 30,000 and 36,000

Heating-15 °C to 24 °C
ENERGY STARnot in the dataset
Heat at -15 °Cnot published
SEER220.0
LogisVertno amount
See the C28 36,000
For a big room to heat all winter: the 4C28 33,000 heats down to -30 °C and puts out 35,000 BTU/h at -15 °C, per its brochure.

Ranges: CanAir C28 brochure (January 31, 2025), p. 4. ENERGY STAR: dataset read Oct. 8, 2026. Heat at -15 °C: ENERGY STAR (9,000 to 24,000). LogisVert: Hydro-Québec list of Oct. 27, 2026; the 9,000 is under the 12,000 BTU/h minimum.

03 · Heat per kWh

At -15 °C, each kWh of electricity gives back 1.80 to 2.21 in heat.

COP compares heat delivered to electricity used. Electric baseboard heat gives 1 kWh of heat per kWh: that is the benchmark.

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—kWh

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Electricity used1 kWh
Output at -15 °C—
Heating range—

Heat and COP at -15 °C (5 °F), at maximum output: NEEP, read Oct. 27, 2026, for the 9,000 to 24,000 (ENERGY STAR lists the same outputs). For the 30,000 and 36,000, COP from the CanAir C28 brochure, p. 4; their heat at -15 °C is published neither in the brochure nor by ENERGY STAR, and their heating range ends at -15 °C.

04 · LogisVert

Three C28 units have an amount: $1,200, $1,800 and $2,544.

$120 per 1,000 BTU/h of output at -8 °C, for an ENERGY STAR cold-climate heat pump of 12,000 BTU/h or more. The other three C28 units miss out, for two different reasons.

C28 · 9,000No amountUnder the required 12,000 BTU/h nominal.Product page →
C28 · 12,000$1,20010,000 BTU/h at -8 °C × $120 / 1,000AHRI 207683257Product page →
C28 · 18,000$1,80015,000 BTU/h at -8 °C × $120 / 1,000AHRI 207683258Product page →
C28 · 24,000$2,54421,200 BTU/h at -8 °C × $120 / 1,000AHRI 207683259Product page →
C28 · 30,000No amountNot in ENERGY STAR or on Hydro-Québec’s list.Product page →
C28 · 36,000No amountNot in ENERGY STAR or on Hydro-Québec’s list.Product page →

Amounts and output at -8 °C: Hydro-Québec LogisVert list of October 27, 2026 (owner, existing home), same as October 8. Rules: LogisVert residential participation guide, version 1.10, September 15, 2026. Hydro-Québec confirms the amount when you apply.

05 · C28 or 4C28

C28 or 4C28: same cold, different refrigerant, different strengths.

The four sizes they share, figure against figure. The green dot marks the better of the two.

SizeSEER2HSPF2 IVHeat at -15 °CLogisVert
C284C28C284C28C284C28C284C28
9,000 BTU/h28.127.411.512.510,60011,500——
12,000 BTU/h25.525.410.410.512,00011,500$1,200$1,440
18,000 BTU/h21.521.411.311.018,00018,000$1,800$2,160
24,000 BTU/h21.521.011.413.525,00024,200$2,544$2,664

The C28 wins on cooling

Its SEER2 is higher in all four shared sizes: 28.1 vs 27.4 in 9,000, and the gap stays in its favour up to 24,000.

The 4C28 wins on LogisVert

Its amounts are higher in 12,000, 18,000 and 24,000 ($1,440, $2,160 and $2,664), and its range goes up to 33,000 BTU/h, every size heating down to -30 °C.

The refrigerant

R-410A for the C28 (GWP 2,088), R-454B for the 4C28 (GWP 466). GWP measures the climate effect of a leak over 100 years: the R-454B figure is about 4.5 times lower (our calculation).

CanAir C28 (p. 4) and 4C35-28-25 (p. 11) brochures; heat at -15 °C: ENERGY STAR (C28) and brochure (4C28); LogisVert: Hydro-Québec list of Oct. 27, 2026; GWP: IPCC AR4.

See the 4C28 series

06 · Questions

What people ask us about the C28.

Which C28 is the most efficient?
The 9,000: SEER2 28.1 and EER2 16.2, the highest of our 22 CanAir wall units, per the brochure. For heating it also leads the series, with an HSPF2 of 11.5 (region IV).
Do all C28 units heat down to -30 °C?
No. From 9,000 to 24,000, yes. The 30,000 and 36,000 have a heating range of -15 °C to 24 °C, per the CanAir brochure.
Why do the C28 30,000 and 36,000 get no LogisVert amount?
Their AHRI numbers are neither in ENERGY STAR nor on Hydro-Québec’s list. LogisVert requires an ENERGY STAR certified heat pump.
How much does LogisVert pay for a C28?
$1,200 for the 12,000, $1,800 for the 18,000 and $2,544 for the 24,000, per Hydro-Québec’s list of Oct. 27, 2026. The 9,000 is under the 12,000 BTU/h minimum.
What does a SEER2 of 28.1 mean?
SEER2 compares the cooling delivered over a season with the electricity used, under the test method in force since January 1, 2023. The higher it is, the less electricity cooling takes for the same comfort.
C28 or 4C28?
The C28 (R-410A) has the higher SEER2 in the four shared sizes. The 4C28 (R-454B) heats down to -30 °C in every size, up to 33,000 BTU/h, and its LogisVert amounts are higher.
Does the C28 have Wi-Fi?
Optional, per our product pages and CanAir’s website, which names no module; the C28 brochure does not mention it. The module offered is confirmed on the quote.
What does the C28 warranty cover?
The compressor and parts, 10 years; limited labour, 6 years, for a residential install in Quebec. That is CanAir’s base warranty for residential systems sold since October 5, 2026.
AirGreen · Air conditioning & heating

Your C28, picked for its efficiency, in the right size.

We come and see the room, check whether a C28 from 9,000 to 24,000 is enough for your winter, and hand you a clear quote with the AHRI number and the indicative LogisVert amount.

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 C28 R-410A brochure (January 31, 2025), pp. 4–5.
  • CanAir C22 R-410A brochure (January 31, 2025), p. 7.
  • CanAir 4C22 R-454B brochure (June 2025), p. 5.
  • CanAir 4C35-28-25 wall heat pump brochure (version 2026-10-05), pp. 8, 11, 12.
  • 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.
  • 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.