Zephyr in Montreal: the R-454B generation heats down to -30°C
Zephyr’s CB25 and UB32 wall units and the Series 6 central system have moved to R-454B and heat down to -30°C, according to the manufacturer. The CB22 wall unit, on R-32, goes down to -25°C. We help you choose, check the LogisVert amount in Hydro-Québec’s tool, and install throughout Greater Montreal.
Current generationGlobal warming potential (GWP), relative to CO₂
At Zephyr: CB25 and UB32 wall units, R-454B multi-zones and the Series 6 central. All heat down to -30°C, except the multi-zone (minimum not published).
GWP and classes: EPA, SNAP program, table of March 19, 2026.
A ZEPHYR heat pump, a local team.
ZEPHYR puts its name, its spec sheet and its 10-year parts warranty on the heat pump. AirGreen picks it with you, installs it and registers the warranty. Each does what it does best.
What ZEPHYR brings
- Down to -30 °CCB25 and UB32 wall units and the Series 6 central system, according to ZEPHYR.
- Up to 32 SEER2The UB32, the most efficient ZEPHYR, on the 9,000 BTU/h.
- 10 years on partsZEPHYR’s base warranty. Labour is separate.
- From wall unit to centralCB22, CB25 and UB32 wall units, 2- to 5-room multi-zone, Series 6 central.
What AirGreen brings
- Sold and installed by AirGreenMontreal, Laval, Longueuil, the South Shore and the North Shore.
- Free home estimateWe look at the rooms, the ducts if there are any, and the line set route.
- Warranty registered for youFree of charge: serial numbers, date and photos.
- RBQ 5645-9605-01Subclasses 15.8, 15.10 and 16.
The result: the right ZEPHYR, chosen with you, installed by AirGreen, warranty registered.
Three questions, one Zephyr.
Ducts or not, one room or several, what matters most to you: the answer changes the series. The LogisVert amount shown is the one in Hydro-Québec’s tool for that system.
UB32 or CB25 · R-454B
- Both heat down to -30°C, according to Zephyr.
- UB32: the most efficient, from 9,000 to 15,000 BTU/h.
- CB25: up to 24,000 BTU/h for large rooms.
Compare the heat of the three series, size by size, in section 02.
CB22, CB25 or UB32: same size, three different winters.
The number in the name is the series’ maximum SEER2. Pick a size: we line up the heat each series delivers in the cold, from the manufacturer’s spec sheet, and Hydro-Québec’s LogisVert amount.
 CB22 · R-32 |  CB25 · R-454B | UB32 · R-454B | |
|---|---|---|---|
| Refrigerant | R-32 | R-454B | R-454B |
| Heats down to | -25°C | -30°C | -30°C |
| Heat at -8.3°C | 9,000 BTU/h | 10,800 BTU/h | 13,000 BTU/h |
| Heat at -15°C | 7,500 BTU/h | 10,600 BTU/h | 12,200 BTU/h |
| Heat at -20°C | 6,000 BTU/h | 7,000 BTU/h | 11,300 BTU/h |
| Heat at -25°C | Not published | 6,100 BTU/h | 9,000 BTU/h |
| SEER2 up to (series) | 22.5 | 25 | 32 |
| ENERGY STAR cold climate | No | Yes | Yes |
| Available in 115 V | Yes (DB22) | Yes (DB25) | No |
| LogisVert (Hydro-Québec) | On quote | $1,296 | $1,560 |
| Spec sheet | See product | See product | See product |
CB22 at 12,000: not on the ENERGY STAR or Hydro-Québec lists, amount on quote.
Heats down to -25°C. ENERGY STAR certified standard, not cold climate: LogisVert at the $50 per 1,000 BTU/h rate.
Heats down to -30°C, electronic expansion valve, ENERGY STAR cold climate. Also available in 115 V (DB25), on a regular outlet.
Zephyr’s most efficient: up to 32 SEER2 on the 9,000. Heats down to -30°C, in 9,000, 12,000 and 15,000 only.
Drop the thermometer: which ones still heat?
Each Zephyr series has a minimum heating temperature published by the manufacturer. Slide down to -30°C to see which ones hold up, and how much heat a 12,000 BTU/h wall unit delivers.
Bars: from 10°C down to the minimum heating temperature published by Zephyr. Hatching: R-454B multi-zone, minimum not published by Zephyr.
4 Zephyr series still heat at this temperature. CB22: capacity at -25°C not published. 12,000 BTU/h wall units, according to the Zephyr brochures (BRO_2606).
One unit outside, 2 to 5 rooms inside.
The Zephyr R-454B multi-zone connects CB25 wall heads to a single outdoor unit. Tell us how many rooms: here are the compressors that can serve them, with the system’s LogisVert amount.
Amount per system (per outdoor unit), never per head. Capacities: Hydro-Québec’s tool, Oct. 6, 2026. The size is chosen at the visit, based on your rooms. All Zephyr multi-zone systems
Two halves that work together in the cold.
Outside, the ZE-6xxHPA heat pump heats down to -30°C. Inside, the AH-6xxA indoor unit blows air through your ducts and can take an electric backup heat kit. Pick the size and the temperature.
Indoor unit
R-410A generation, on quoteAn R-454B heat pump pairs with an R-454B indoor unit with an expansion valve (TXV). Generations are never mixed.
The manufacturer requires the same capacity inside and out. Each certified pair has its own AHRI number.
The R-454B indoor unit comes with a factory-installed refrigerant detection sensor, designed for this A2L refrigerant.
Kits from 5 to 10 kW (2 tons), up to 15 kW (3 tons), up to 20 kW (4 and 5 tons), according to the Zephyr manual.
From R-410A to R-454B: what changes for you.
Between 2024 and 2026, Zephyr moved almost its entire lineup to R-32 and R-454B. In Canada, no rule yet requires the end of R-410A in residential heat pumps. Tap a date.
Turquoise dot: Zephyr (market date according to ENERGY STAR). Yellow dot: rule or regulatory milestone.
Canada: no residential limit
The federal regulation sets GWP limits for refrigeration and chillers (750 since 2025), not for residential air conditioners and heat pumps. Quebec regulates how refrigerants are handled, not which ones are chosen.
Source: SOR/2016-137, Schedule 1.1, current to Apr. 28, 2026; Q-2, r. 29.
In Canada, GWP limits target refrigeration and chillers, not residential heat pumps. Your R-410A system can stay in place.
R-32 and R-454B are classed A2L. Hence the leak sensor in the central indoor unit, and a trained installer.
An R-454B heat pump does not go on an R-410A indoor unit. If one half fails, we check the pairing before suggesting anything.
2,090 for R-410A, 470 for R-454B, according to the EPA. That is why manufacturers are switching.
73 Zephyr products, in five families.
The five collections from our previous page, with their sub-collections by series and by number of zones.
ZEPHYR Wall-Mounted Heat Pump
CB22, CB25 and UB32, from 9,000 to 24,000 BTU/h, in 115 or 220 V.
ZEPHYR Multi Zone Heat Pump
From 2 to 5 rooms on a single outdoor unit.
ZEPHYR Central Heat Pump
Series 6 R-454B from 2 to 5 tons, on your ducts.
ZEPHYR Electric Furnace
Indoor units for the central system, with electric backup heat.
ZEPHYR Wall-Mounted Air Conditioner
Cooling only, from 12,000 to 24,000 BTU/h.
By series and by number of zones
R-410A generation : Zephyr 18 and Zephyr 23 wall units, “Zephyr 22” multi-zones, “18 SEER” central systems and wall air conditioners. Availability and price on quote, no LogisVert amount shown here.
Products in our catalogue, by family
The 4 R-454B air handlers are listed with the electric furnaces in our shop.
From $740 to $4,440 per Zephyr system. Checked with Hydro-Québec.
We ran each of the 39 AHRI numbers on our Zephyr product pages through Hydro-Québec’s official tool. Here are the 15 current-generation systems, on R-32 and R-454B, that are listed. Tap one to see the calculation and your claim deadline.
- All 9,000 BTU/h units: below the 12,000 BTU/h minimum.
- CB22 12,000 and 24,000: not on the ENERGY STAR list or Hydro-Québec’s.
- R-410A generation: the “Zephyr 22” multi-zones are on Hydro-Québec’s list; Zephyr 18 and 23 wall units, the “18 SEER” central and the air conditioners are not. Availability and amount on quote.
ZE-660HPA + AH-660A
July 7, 2027
Source: Hydro-Québec, LogisVert participation guide v1.10 (Sept. 15, 2026) and eligible heat pump search tool (owner, existing home), consulted Oct. 6, 2026. ENERGY STAR required since Nov. 26, 2025; outdoor unit of at least 12,000 BTU/h; grant capped at 100% of the cost before taxes; claim within 9 months. Indicative amounts, confirmed by Hydro-Québec when you apply. Our LogisVert guide
10 years on parts. Labour is separate.
Zephyr’s base warranty covers parts for 10 years. The manufacturer does not cover labour: ask your contractor.
on parts, according to the manufacturer’s (TTI) brochures and website, consulted Oct. 6, 2026
Functional parts in stock at TTI, otherwise an announced lead time of 2 to 6 weeks; cosmetic parts (remote, grilles, louvres) not covered, according to TTI’s parts policy (v3.4, July 17, 2026).
Maintenance or repair by an uncertified person voids the manufacturer’s warranty.
If something breaks, you call the installer, who files the claim with TTI. TTI does not repair on site.
Clean filters, clean outdoor coil, snow and debris cleared: TTI excludes failures caused by lack of maintenance.
We look at the rooms, the ducts if there are any, and the line set route.
The series, the size, the AHRI number and the indicative LogisVert amount.
Vacuum, refrigerant charge, heating and cooling tests.
We register the unit with TTI for you, free of charge: serial numbers, date, photos.
128 published Zephyr projects, mostly wall units in Montreal.
Each article on our blog shows an installation: the unit, the place, the method. Rosemont, Villeray, the Plateau and the Sud-Ouest lead, then Laval. Tap a region.
Rosemont–La Petite-Patrie 33 · Villeray–Saint-Michel–Parc-Extension 17 · Le Sud-Ouest 14 · Le Plateau-Mont-Royal 11 · Ville-Marie 11…
Pin: our showroom in Boucherville.
Articles published per month, 2026
By installation type
By year
What people ask us about Zephyr.
Zephyr is a brand of TTI Climatisation Chauffage, a distributor based in Longueuil since 2005 that sells only to licensed contractors. TTI handles the warranty and parts in Canada.
Your Zephyr, chosen for your home and installed by AirGreen.
We come see the house, choose the series and size with you, and give you a clear quote, with the AHRI number and the indicative LogisVert amount.
Hydro-Québec does not solicit 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 and 7, 2026
- TTI Climatisation Chauffage (tticlimatisation.com): Zephyr CB22, CB25, UB32, R454b Central and R454b Multi Zone product pages, consulted Oct. 6, 2026.
- Zephyr CB22, CB25 and UB32 brochures (BRO_2606): heating capacities, minimum temperatures, SEER2, warranty.
- Zephyr manuals for the R-454B central (heat pump and AH-6xxA indoor unit, 21-4245 kits) and the R-410A central.
- TTI, Parts and warranty policy, version 3.4, July 17, 2026.
- ENERGY STAR, Certified Air-Source Heat Pumps, dataset w7cv-9xjt, data from Oct. 6 and 7, 2026 (AHRI numbers on the Zephyr 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), consulted Oct. 6, 2026.
- Ozone-depleting Substances and Halocarbon Alternatives Regulations (SOR/2016-137), Schedule 1.1, current to Apr. 28, 2026.
- U.S. EPA: 40 CFR 84.54 and final rule of May 26, 2026 (in force July 27, 2026); SNAP program, table of March 19, 2026 (GWP and safety classes).
- AirGreen, “Nos réalisations” blog, articles published as of Oct. 7, 2026, and airgreen.ca product pages.
LogisVert amounts are indicative: Hydro-Québec confirms them when you apply. Price on quote.
Every ZEPHYR product we carry, right below.
Wall units, multi-zone, central, electric furnaces, wall air conditioners: filter by type, capacity or series, then compare the product pages.
