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Sharp in Montreal: at -30°C, the ranking changes.
The BTU number on the box doesn’t tell the whole winter story. According to Sharp’s spec sheets, at -30°C the CHU 12,000 still delivers 9,700 BTU/h, more than the CU 18,000. The CHU, CU and FilterSweep series heat down to -30°C, the Airest and the CU 12,000 down to -27°C. We help you choose the right one, then install it anywhere in Montreal, Laval, Longueuil, the South Shore and the North Shore.
Cold-weather rankingWhich one heats the most at -30°C?
CHU 18,000
11,800= (1st)
CU 24,000
10,500+1 place (3rd)
CHU 12,000
9,700+2 places (5th)
CU 18,000
9,200-2 places (2nd)
CU 15,000
8,900+1 place (6th)
FilterSweep 12,000
8,000-2 places (4th)
Maximum heating output per unit, at the size shown. -8°C and -15°C: ENERGY STAR (17°F and 5°F). -20°C to -30°C: Sharp submittal sheets, January 2026 (FilterSweep: May 2026; Airest: June 2025). The rank in brackets is the rank at -8°C.
Japanese engineering, a local team.
SHARP designs the heat pump. AirGreen picks it with you, installs it and commissions it. Each does what it does best.
What SHARP brings
- Down to -30°CThe CHU, CU and FilterSweep series, according to Sharp’s spec sheets.
- Four names, one lineupCHU, CU, FilterSweep and Airest: Sharp’s 2025-2026 lineup.
- PlasmaclusterSharp’s ion technology, from the CHU, CU and Airest wall units to the purifiers.
- AHR Innovation 2026 awardThe Airest, in the indoor air quality category.
What AirGreen brings
- SHARP Platinum dealerOn Sharp’s official dealer list for Quebec.
- Free home estimateWe look at the room, the wall and the outdoor location.
- Full commissioningAnd SHARP AIR app setup at installation.
- RBQ 5645-9605-01Subcategories 15.8, 15.10 and 16.
The result: the right Sharp, chosen with you for your winter, installed and commissioned by a Platinum team.
Four current wall units, two multi-zones, two purifiers.
Sharp’s 2025-2026 lineup comes down to four names: CHU, CU, FilterSweep and Airest. The ZU1 and ZHU1 series, which we’ve installed a lot, and the previous generations are still in the catalogue. Pick a type.


CHU series
Sharp’s top of the line: the most heat at -30°C for its size, motion sensor, Plasmacluster ion indicator.


CU series
The widest lineup: four sizes, dark grey in 15,000 and 18,000, heads compatible with the CU multi-zone.

FilterSweep
A brush cleans the filter automatically after each use and pushes the dust into a bin. A first in North America, according to Sharp.


ZU1 and ZHU1
The generation we’ve installed the most. Still offered in 12,000 to 24,000 (ZU1) and 12,000 or 18,000 (ZHU1).


All Sharp wall units
Every series, every size, with the catalogue filters (BTU, temperature, Wi-Fi, ENERGY STAR).
Two Sharp units side by side, from spring to deep cold.
Pick one wall unit on the left and one on the right. Green marks the better value on each line.
Wall unit A
Wall unit B
CHU 12,000
CU 18,000Sources: Sharp submittal sheets (January 2026; FilterSweep May 2026; Airest June 2025), ENERGY STAR at 17°F and 5°F, Hydro-Québec LogisVert tool checked Oct. 6, 2026. Plasmacluster: per Sharp owner’s manuals.
White, or dark grey on three models.
Sharp offers a “Dark Gray” finish on the CU 15,000, the CU 18,000 and the CHU 12,000. All the others are white. Pick a model, then a colour.

Same unit, same performance: only the front panel changes. Dark grey is less noticeable on a dark or wood wall.
On airgreen.ca, these models are listed as “Black”: CU black · CHU black.
Plasmacluster, FilterSweep, Airest: what Sharp actually says.
Sharp puts the focus on the air in the room, not just on heat. We stick to what its own documents state, caveats included.
How Sharp describes its ions
A small electrical discharge produces positive and negative ions surrounded by water molecules.
On a surface, these ions combine into OH radicals.
According to Sharp, these radicals remove hydrogen from surface proteins, which reduces their activity.
What does your model have?
Sources: Sharp manuals OM_CU_CHU, OM_CPU, OM_ZU_ZHU_BU; Sharp FilterSweep and Airest pages, checked Oct. 6, 2026.
One unit outside, two or three rooms inside.
The AE-X3M24CU compressor takes CU heads of 9,000, 12,000 or 18,000 BTU/h and heats down to -30°C. Build your combination: we apply Sharp’s table.
Room 1
Room 2
Room 3
Rated heating per head (8.3°C outdoors), Sharp capacity table for the AE-X3M24CU. CHU units don’t connect to a multi-zone system (Sharp CU/CHU manual).
Rated system heating (12,000 + 12,000 + 9,000)
Also: all dual-zone · all triple-zone · all Sharp multi-zone
Airest, the wall unit that filters like a purifier.
A new standard in air conditioning and air purification.
The Airest adds a MERV 14 activated-carbon filter to a wall unit that heats down to -27°C. It won the AHR Innovation 2026 award in the indoor air quality category.
Plasmacluster in a portable unit.
Two Sharp air purifiers and humidifiers from the Plasmacluster 7000 series, for a room without a heat pump or as a complement.
1 year parts and labour
This is the warranty Sharp Electronics of Canada provides on these purifiers, from the date of purchase (residential use).
Sharp purifiersFrom $1,740 to $3,000 per Sharp system, checked with Hydro-Québec.
We looked up every AHRI number on our Sharp product pages in Hydro-Québec’s tool on October 6, 2026. Every Sharp on the list is rated cold climate: $120 per 1,000 BTU/h of heat at -8°C.
| Sharp system | AHRI | Heat at -8°C | LogisVert |
|---|---|---|---|
| CU multi-zone · 2 or 3 roomsAE-X3M24CU | 217512785 | 25,000 BTU/h | $3,000 |
| BU multi-zone · 2 or 3 roomsAE-X3M24BU, previous generation | 213927543 | 25,000 BTU/h | $3,000 |
| CHU 18,000AE-X18CHU + AY-XP18CHU | 217508925 | 22,600 BTU/h | $2,712 |
| ZHU 18,000AE-X18ZHU + AY-XP18ZHU, previous generation | 209424784 | 22,600 BTU/h | $2,712 |
| CU 18,000 · white or dark greyAE-X18CU + AY-XPC18CU (-B) | 217508915 / 217508914 | 22,400 BTU/h | $2,688 |
| CU 24,000AE-X24CU + AY-XP24CU | 217508895 | 22,400 BTU/h | $2,688 |
| ZU1 24,000AE-X24ZU1 + AY-XP24ZU1 | 213246054 | 22,400 BTU/h | $2,688 |
| ZU1 18,000AE-X18ZU1 + AY-XP18ZU1 | 213246053 | 22,000 BTU/h | $2,640 |
| FilterSweep 12,000AE-X12DWU + AY-XP12DWU | 218327264 | 19,000 BTU/h | $2,280 |
| CHU 12,000 · white or dark greyAE-X12CHU + AY-XP12CHU (-B) | 217512736 / 217512733 | 18,900 BTU/h | $2,268 |
| ZHU1 12,000AE-X12ZHU1 + AY-XP12ZHU1 | 213238803 | 18,900 BTU/h | $2,268 |
| CU 15,000 · white or dark greyAE-X15CU + AY-XP15CU (-B) | 217512734 / 217508926 | 18,100 BTU/h | $2,172 |
| ZU1 15,000AE-X15ZU1 + AY-XP15ZU1 | 213239134 | 18,100 BTU/h | $2,172 |
| CU 12,000AE-X12CU + AY-XPC12CU | 217512740 | 15,000 BTU/h | $1,800 |
| Airest 12,000AE-X12CPU + AY-XP12CPU | 216624517 | 15,000 BTU/h | $1,800 |
| ZU1 12,000AE-X12ZU1 + AY-XP12ZU1 | 213194987 | 14,500 BTU/h | $1,740 |
Since November 26, 2025, only an ENERGY STAR certified system is eligible.
The outdoor unit must have a rated capacity of at least 12,000 BTU/h.
The grant never exceeds 100% of the pre-tax cost.
Deadline to apply: 9 months after installation (LogisVert guide, version 1.10).
Indicative amounts: Hydro-Québec confirms the grant when you apply. The multi-unit building bonus only applies to certain eligible buildings and is not included here.
The Sharp warranty, as Sharp writes it.
Sharp consumer limited warranty (U.S. and Canada), Airest and ZU / ZHU / BU manuals, read Oct. 6, 2026. Warrantor: Sharp Corporation.
Good to know
- The years count from the installation date.
- Keep your proof of purchase and installation date: Sharp asks for them.
- Filters, accessories and cosmetic parts are not covered.
- A unit moved from its original installation site loses the warranty.
SHARP Platinum partner, certified performance.
AirGreen is on Sharp’s official dealer list for Quebec. Here’s what that means for you.
Access to the CHU, CU, FilterSweep, Airest, ZU1 and ZHU1 series and to Sharp multi-zone systems.
And 6 years on other parts, from installation, according to the Sharp manuals (section 09).
Heating from -27°C to -30°C depending on the series.
Installation, Wi-Fi setup with the SHARP AIR app, Plasmacluster ion settings, diagnostics and repairs.
Professional vacuum pull, refrigerant parameters validated, performance checked for winter.
Sharp parts through Sharp’s Canadian distributor; after-sales service in Montreal, Laval, Longueuil, the North Shore, the South Shore and Montérégie.
With AirGreen and SHARP, you get the balance of Japanese engineering, proven reliability and an installation done to the highest standards.
We look at the room, the wall and the outdoor location.
Series, size, colour, and the indicative LogisVert amount with its AHRI number.
Full commissioning and SHARP AIR app setup.
We stay your contact for the Sharp warranty and maintenance.
Sharp on video, and our installations in vertical format.
Four brand videos, then seven short clips shot on our job sites.
1,345 published SHARP installation articles since 2023.
Each article on our blog presents one installation: the unit, the neighbourhood, how it was done. Montreal leads, Rosemont–La Petite-Patrie in particular. Pick a year, then a region.
Rosemont–La Petite-Patrie 285 · Plateau-Mont-Royal 84 · Le Sud-Ouest 71
Pin: our showroom in Boucherville. Two articles with no identifiable city are not on the map.
Articles published per year
2026: as of October 6. 757 articles in the last 12 months.
By installation type
By series named in the article






What people ask us about Sharp.
Yes. According to Sharp’s spec sheets, the CHU, CU (15,000 to 24,000), FilterSweep and CU multi-zone series heat down to -30°C. The CU 12,000 and the Airest go down to -27°C, like the ZU, ZU1, ZHU, ZHU1 and BU generations. The TU and THU (R-410A) are older.
Your Sharp, chosen for your winter, installed by AirGreen.
We come see the house, choose the series, size and colour with you, then give you a clear quotation with the AHRI number and the indicative LogisVert amount.
Hydro-Québec never solicits anyone by phone or door to door for LogisVert. A call “from Hydro-Québec” selling a heat pump? Hang up.
Sources checked on October 6, 2026
- Sharp HVAC North America (global.sharp/products/hvac): CHU/CU, FilterSweep and Airest pages, “Find a Dealer” list (Quebec), history; checked Oct. 6, 2026.
- Sharp submittal sheets: CHU and CU (January 2026), FilterSweep AY-XP12DWU (May 2026), Airest AY-XPC12CPU (June 2025), AE-X3M24CU multi-zone (January 2026) and its capacity table.
- Sharp owner’s manuals OM_CU_CHU, OM_CPU and OM_ZU_ZHU_BU (limited warranty, Plasmacluster ions, After Care and self-cleaning, ozone).
- Sharp, Plasmacluster pages (global.sharp/pci): mechanism, cited tests and Sharp’s caveats; checked Oct. 6, 2026.
- Sharp, “AHR Expo 2026” news item of April 16, 2026 (AHR Innovation 2026 award for the Airest).
- Sharp Electronics of Canada: warranty for the KCP110CW and KCP70CW purifiers.
- ENERGY STAR, Certified Air-Source Heat Pumps, dataset w7cv-9xjt, data of Oct. 6, 2026 (AHRI numbers from the Sharp product pages).
- Hydro-Québec, LogisVert residential participation guide, version 1.10, Sept. 15, 2026.
- Hydro-Québec, eligible heat pump search tool (search by AHRI number), checked Oct. 6, 2026.
- AirGreen, installations blog, articles published as of Oct. 6, 2026; airgreen.ca product pages, Oct. 6, 2026.
LogisVert amounts are indicative: Hydro-Québec confirms them when you apply.
Every SHARP product we carry, right below.
Wall units, multi-zone systems, purifiers: filter by type, capacity or series, then compare the product pages.


