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AirGreen × CANAIR · 4CDH central · R-454BThe whole house, through your ductsSold and installed by AirGreen in Montreal, Laval, Longueuil and on the South and North Shores.
The full CanAir rangeCanAir · 4CDH central system · R-454B
The whole house, through your ducts, down to -30 °C.
Two units, one thermostat: the 4CDH outdoor unit and its multi-position indoor unit, from 1.5 to 5 tons, on R-454B. The wired Wi-Fi controller is included. At -15 °C, the 3-ton gives 39,000 BTU/h: more than its 36,000 nameplate.
Updated October 27, 2026 · CanAir 4CDH brochure, ENERGY STAR, NEEP and Hydro-Québec’s LogisVert list
-30 °Cheating on all 6 sizes, per the CanAir brochure
39,000BTU/h at -15 °C for the 3-ton, per CanAir
246 ftmaximum piping between the two units, 3 to 5 tons
$5,400indicative LogisVert for the 5-ton, Hydro-Québec list of Oct. 27, 2026
This page answers
For a home that has ducts, or an electric furnace near the end of its life, and wants to heat and cool every room with a single CanAir system.
On this page
The CanAir shop · 4CDH central
All six 4CDH central systems, right below.
From 1.5 to 5 tons. Each page lists the full system’s AHRI number and the indicative LogisVert amount.
01 · Your starting point
What you have today decides which CanAir system fits.
Tap what you have today. We show you the CanAir system that fits, and why.
Today, in your home
At the visit: we look at the ducts, the room in the basement, the electrical panel and the spot for the outdoor unit. The final choice is made there, with you.
The right system
The complete 4CDH central system.
The 4CDH indoor unit takes your electric furnace’s place, with its own optional 5 to 25 kW electric elements. The outdoor unit heats and cools the whole house through your existing ducts.
If your electric furnace still works well, the add-on adds a CanAir coil to it: we compare both options during the visit.
The right system
The add-on: your furnace stays.
A cased CanAir coil goes on your furnace, connected to a 4CDH or CDH outdoor unit. The heat pump heats; the furnace takes over when needed.
AirGreen installs the heat pump and the coil. We do not touch the burner or the gas or oil supply: if your furnace needs work, a contractor holding the required licence takes care of it.
The right system
A 4CDH heat pump replaces the air conditioner.
It cools in summer, like your air conditioner, and heats in winter down to -30 °C. If the furnace stays, it is an add-on; if your furnace is electric and due for replacement too, it is the complete central system.
The right system
A wall unit, or a multi-zone.
Without ducts, a central system means installing them. A CanAir wall unit heats one room or an open area; a 4C28 multi-zone heats 2 to 6 rooms with a single outdoor unit.
02 · The six sizes
Six sizes, from 18,000 to 52,000 BTU/h of heat at -15 °C.
Tap a size: its heat in deep cold, its airflow and its LogisVert amount, with the math.
System size
One ton is 12,000 BTU/h. The word comes from ice: melting a short ton of ice (2,000 lb) in 24 hours absorbs 12,000 BTU per hour. It is a size class: the 2-ton cools at 23,000 BTU/h and the 5-ton at 54,000.
—
—BTU/h
—
Nominal cooling—
Max. output at -30 °C—
COP at -15 °C—
Max. airflow (indoor unit)—
Indicative LogisVert—
| Size | Cooling (BTU/h) | Heat at -15 °C | Max. at -30 °C | SEER2 | HSPF2 IV / V | AHRI | LogisVert |
|---|---|---|---|---|---|---|---|
| 1.5 tons | 18,000 | 18,000 | 12,000 | 19.0 | 9.7 / 8.0 | 215449704 | $1,800 |
| 2 tons | 23,000 | 21,600 | 12,000 | 18.3 | 10.0 / 8.0 | 215449705 | $2,496 |
| 2.5 tons | 30,000 | 32,600 | 20,100 | 16.8 | 10.0 / 8.3 | 215449706 | $2,856 |
| 3 tons | 36,000 | 39,000 | 27,800 | 17.3 | 10.3 / 8.6 | 215449707 | $3,816 |
| 4 tons | 48,000 | 46,000 | 25,900 | 16.5 | 9.5 / 8.0 | 215449708 | $4,740 |
| 5 tons | 54,000 | 52,000 | 30,900 | 16.0 | 9.0 / 8.0 | 215449709 | $5,400 |
Nominal capacities, heat at -15 °C, COP, SEER2, HSPF2 (region IV, the reference; region V, colder) and airflows: CanAir 4CDH brochure (revised July 18, 2025). Maximum output at -30 °C (-22 °F): NEEP, Oct. 27, 2026. LogisVert: Hydro-Québec list of Oct. 27, 2026, $120 per 1,000 BTU/h of output at -8 °C.
03 · The circuit
From 16 to 40 A: what the outdoor unit asks of the panel.
Each size publishes its minimum ampacity and maximum fuse. Generally, the bigger the size, the bigger the circuit.
Outdoor unit circuit: minimum ampacity / maximum fuse
CanAir 4CDH brochure (revised July 18, 2025), outdoor unit table, 208-230 V single-phase.
AirGreen also does the electrical
Subclass 16 (electrical) of our RBQ licence 5645-9605-01. We check the panel’s space and capacity during the visit, before the quote.
The indoor unit counts too
If it gets electric elements (5 to 25 kW, optional), their supply adds to the panel calculation. The details are on the 4CDH indoor unit page.
04 · The distance
Up to 246 ft between the outdoor unit and the basement.
Handy when the best spot for the outdoor unit is far from the furnace. Slide the length and height difference of your case.
Piping length between the two units
15 ft—260 ft
Height difference between the two units
0 ft—110 ft
Sizes that allow it
These limits come from the brochure. The actual line route is measured during the visit.
Maximum length and height difference: CanAir 4CDH brochure (revised July 18, 2025). 246 ft = 75 m; 98.4 ft = 30 m.
05 · The controls
One thermostat for the whole house, Wi-Fi included.
On a central system, a single control sets the temperature for the whole house.
Included
Wired Wi-Fi controller
It comes with the central system, per the 4CDH brochure. One control for the whole house.
24 V thermostat
The indoor unit’s board also accepts a 24 V thermostat, per the brochure. We discuss it at the quote if you have one you like.
Constant airflow
The indoor unit’s ECM motor holds its airflow up to 0.8 in. H2O of static pressure, per the brochure.
CanAir 4CDH brochure (revised July 18, 2025): wired Wi-Fi controller (included), board for a 24 V thermostat, constant-airflow ECM motor.
06 · Our installs
CanAir central systems installed by AirGreen.
Sainte-Adèle, Rougemont and the South Shore: each install has its article and photos.
Dec. 9, 2025CanAir central system in Sainte-Adèle
Aug. 3, 20264CDH electric furnace in Rougemont
Apr. 14, 2025CanAir -30 central system, South Shore
Photos and articles: AirGreen’s installation blog.
07 · Questions
What people ask us about the 4CDH central system.
Does the 4CDH central system replace my electric furnace?
Yes: its indoor unit takes the furnace’s place and can take optional 5 to 25 kW electric elements. The outdoor unit does the heating and cooling.
What if I have a gas or oil furnace?
That is the add-on case: a CanAir coil goes on your furnace, which stays. AirGreen does not work on burners or on the gas or oil supply.
What size for my home?
It is worked out at your home, not from a label: we look at the house, the ducts and your heat loss during the visit. The six sizes run from 1.5 to 5 tons.
How much does LogisVert pay for a 4CDH central system?
From $1,800 (1.5 tons) to $5,400 (5 tons), indicative amounts per Hydro-Québec’s list of October 27, 2026. The amount follows the AHRI number of the complete system, outdoor and indoor.
How cold can it heat?
Down to -30 °C, per the CanAir brochure (heating range -30 °C to 24 °C). At -30 °C, NEEP lists 12,000 to 30,900 BTU/h depending on size.
Does the Wi-Fi controller come with the system?
Yes: the 4CDH brochure lists a wired Wi-Fi controller included with the system.
Can my current ducts be used?
That is the idea of a central system: reuse the ducts already there, if they are suitable. We check their condition and size during the visit, before confirming the system.
What warranty covers the central system?
10 years on the compressor and parts for residential use, per CanAir’s base warranty. Labour coverage depends on the date of sale: we confirm it in writing on the quote.
AirGreen · Air conditioning & heating
Your CanAir central system, sized for your home and your ducts.
We come and see the ducts, the basement and the panel, work out the size with you, and hand you a clear quote with the system’s 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 4CDH R-454B brochure (revised July 18, 2025).
- 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 CDH and 4CDH base warranty (version 2026-02-23) and CanAir base 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.