-
Added to comparison 
-
Added to comparison 
-
Added to comparison 
-
Added to comparison 
-
Added to comparison 
-
Added to comparison 
-
Added to comparison 
-
Added to comparison 
-
Added to comparison 
-
Added to comparison 
-
Added to comparison 
Closed · we’ll get back to you as soon as we openMontréal · Laval · Longueuil · South Shore · North Shore
Air-to-water heat pump · Updated October 2, 2026
Air-to-water heat pump installation in Montréal, Laval, Longueuil, the South Shore and the North Shore
Keep your floors and your radiators. Change what heats the water.
An air-to-water heat pump replaces or backs up your boiler, oil-fired or electric. Even at −15 °C, the Midea M Thermal Arctic still delivers 2.06 times more heat than it uses, according to its spec sheet. Slide the thermometer to see.
Quick request · 30 seconds
Your 100% free in-home estimate
An air-to-water heat pump is chosen at your place: we look at your boiler, your emitters and where the outdoor unit will go. The visit is free.
To schedule your free visit
To receive your written estimate
RBQ licence: 5645-9605-01 · Free in-home estimate · Written estimate within 24 hours
The information in this form is collected by 9259-2864 Québec inc. (AirGreen) to process your request and contact you about it. Only staff who need it have access. It is stored by our technology providers, some of them outside Québec. You may request access or correction, or withdraw your consent, by writing to direction@airgreen.ca. Privacy policy.
45,377
BTU/h delivered
2.7
COP
35 °C
supply water
À −7 °C outside, with water at 35 °C, the Midea delivers 45,377 BTU/h and gives 2.7 times more heat than the electricity it uses. Midea M Thermal Arctic 5-ton, submittal sheet, January 2026.
4 brandsMidea, Gree, Hydro Solar and effiQueenc
11 modelssplit and monobloc, from 30,000 to 82,000 BTU
−30 °Clowest heating limit (effiQueenc, per its spec sheet)
24 hfor your written estimate after the visit
01 · Our brands
Our air-to-water heat pump brands: Midea, Gree, Hydro Solar and effiQueenc.
Four manufacturers, eleven models, from 2.5 to 7 tons. Tap a logo: its verified facts, its models and its collection.
Air-to-water heat pump Midea
New · distributed by Descair1 model · 5-ton split (16 kW)
- Split: the refrigerant stays between the two units; only water circulates through the house
- Heats down to −25 °C; 33,780 BTU/h and COP 2.06 at −15 °C (water at 43.3 °C)
- Two zones, domestic hot water, built-in 3 kW electric backup heat
- R-32 · 5-year compressor warranty, 2-year parts
Source: Midea 16 kW submittal sheet, January 2026
Air-to-water heat pump collection Midea02 · The models
All our air-to-water heat pump models, each with its full spec sheet.
Filter by type, brand or tonnage just below. Each spec sheet gives the model number, the capacity and the cold limit; compare them or ask for a price right from the grid.
03 · The configurator
Your air-to-water system, configured in four answers.
Answer what you know: your configuration builds on the right, with the models that match it. One click, and it goes out with your estimate request.
1. Your current heating
Required2. Your emitters (choose any)
3. Heated area: 2,200 sq ft
800 sq ft5,000 sq ft
4. Beyond heating
Domestic hot water?
Air conditioning in summer?
Your configuration
1 sur 4Your setup, live
ConfigurationSplit recommended: no water outside
Size5 tons (54,500 to 60,000 BTU)
Buffer tankTo be confirmed at the design stage
Backup heatElectric element, sized at the visit
Hot waterTo be determined
CoolingTo be determined
Fresh airAir exchanger recommended
Heating oilNot applicable
Split models at this size
Midea M Thermal Arctic 5 tons−25 °CGree Versati III−20 °CHydro Solar Split 5 tons−25 °CeffiQueenc 5-ton split−30 °C
Attach to my estimate request Ballpark figure (AirGreen rule: 18,000 BTU/h per 1,000 sq ft). The heat loss calculation during the visit has the final say.
04 · Compare
Compare our air-to-water heat pumps: chart, side by side and table.
Three ways to compare the eleven models. Everything comes from the spec sheets; COPs are measured under different conditions from one brand to the next, so treat them as a guide, not a ranking.
Heating limit
The longer the bar, the colder it can get before the model stops heating (operating limit per the spec sheet).
effiQueenc · Split
5-ton split
Heats down to−30 °C
Capacity60,000 BTU
RefrigerantR-410A
Outdoor noise50 dB
Comparator: three models side by side
In green: the best of your selectionMidea
M Thermal Arctic 5 tons
TypeSplit
Capacity60,000 BTU
Heats down to−25 °C
Outdoor noise57 dB
RefrigerantR-32
COP (spec sheet)4.5
Warranty5-year compressor, 2-year parts
Wall-mounted hydronic module, 2 zones, built-in 3 kW backup heat
See the spec sheet
5-ton split
TypeSplit
Capacity60,000 BTU
Heats down to−30 °C
Outdoor noise50 dB
RefrigerantR-410A
COP (spec sheet)3.34
Warranty5 years
Split with Hydro-Box, Panasonic compressor, 220 V
See the spec sheet
Monobloc 5 tons
TypeMonobloc
Capacity60,000 BTU
Heats down to−25 °C
Outdoor noise—
RefrigerantR-410A
COP (spec sheet)3.8
Warranty5 years
Monobloc, 57,387 BTU/h heating per the spec sheet
See the spec sheetComparison table of the 11 models
| Model | Type | Capacity | Heats down to | Refrigerant | Outdoor noise | COP (spec sheet) | Warranty |
|---|---|---|---|---|---|---|---|
| Midea M Thermal Arctic 5 tons | Split | 60,000 BTU | −25 °C | R-32 | 57 dB | 4.5 | 5-year compressor, 2-year parts |
| Gree Versati III | Split | 60,000 BTU | −20 °C | R-410A | 58 dB | 4.1 | — |
| Gree Versati IV | Monobloc | 54,500 BTU | −25 °C | R-32 | 60 dB | 4.4 | — |
| Hydro Solar Split 2.5 tons | Split | 30,000 BTU | −25 °C | R-410A | — | 4.5 | 5 years |
| Hydro Solar Split 5 tons | Split | 60,000 BTU | −25 °C | R-410A | — | 3.8 | 5 years |
| Hydro Solar Split 7 tons | Split | 82,000 BTU | −25 °C | R-410A | — | 3.4 | 5 years |
| Hydro Solar Monobloc 2.5 tons | Monobloc | 30,000 BTU | −25 °C | R-410A | — | 3.4 | 5 years |
| Hydro Solar Monobloc 5 tons | Monobloc | 60,000 BTU | −25 °C | R-410A | — | 3.8 | 5 years |
| Hydro Solar Monobloc 7 tons | Monobloc | 82,000 BTU | −25 °C | R-410A | — | 3.4 | 5 years |
| effiQueenc 5-ton split | Split | 60,000 BTU | −30 °C | R-410A | 50 dB | 3.34 | 5 years |
| effiQueenc 5-ton monobloc | Monobloc | 60,000 BTU | −30 °C | R-410A | 54 dB | — | 5 years |
Midea: COP 4.5 at 7 °C with 35 °C water (submittal sheet). Other brands: test conditions not stated on the spec sheet.
05 · How it works
How an air-to-water heat pump works: from January air to the water in your floor.
It moves heat from the outdoor air into your heating water. Tap an emitter and a configuration: the diagram shows where the refrigerant and the hot water flow.
Step · Capture
The outdoor unit captures heat from the air, even in winter, thanks to the refrigerant and the compressor.
Radiant floor · water 30 to 40 °C
The ideal emitter: lukewarm water is enough, and the cooler the water, the more heat the heat pump gives back for every kilowatt-hour. A well-designed floor runs between 30 and 40 °C.
Source: Midea spec sheet
Configuration
Split: a refrigerant line connects the outdoor unit to the hydronic module installed indoors. No water leaves the house, so nothing freezes outside.
Energy efficiency
An electric boiler gives 1 kWh of heat for every 1 kWh it uses. According to its spec sheet, the Midea gives 4.5 at +7 °C and still 2.06 at −15 °C.
Savings
The cooler the supply water, the higher the efficiency: a radiant floor running between 30 and 40 °C gets the most out of it. The heating curve adjusts the water to the weather.
Versatility
Heating through the floor, radiators or fan coils, domestic hot water and, with fan coils, summer air conditioning: one single outdoor unit.
06 · Split or monobloc
Split or monobloc air-to-water heat pump: the real difference is where the water goes.
Both produce the same hot water. What changes: what goes through the wall, and who does which work.
Split
No water outsideA refrigerant line connects the outdoor unit to a hydronic module installed indoors. Only the heating water circulates in the house.
- Nothing freezes outside, no antifreeze in the outdoor circuit
- Wall-mounted module that frees up floor space in the mechanical room (Midea)
- Refrigerant line installed by our refrigeration technicians (15.10)
Our splits: Midea M Thermal Arctic, Gree Versati III, Hydro Solar 2.5 · 5 · 7 tons, effiQueenc 5 tons.
Monobloc
Water goes through the wallEverything happens in the outdoor unit, heat exchanger included. The hot water leaves from outside and enters the house through freeze-protected pipes.
- No refrigerant line to install: the unit is factory-sealed
- Outdoor circuit must be protected from freezing (glycol or other)
- Water connection by our licensed partner (15.4)
Our monoblocs: Gree Versati IV, Hydro Solar 2.5 · 5 · 7 tons, effiQueenc 5 tons.
07 · In extreme cold
Air-to-water heat pump in extreme cold: the full curve, from the manufacturer’s figures.
Capacity and COP published by Midea for the 5-ton M Thermal Arctic. Tap a point or a temperature: the thermometer at the top of the page follows.
À −7 °C · Typical January
45,377
BTU/h · 13.3 kW · COP 2.7 · 83 % of rated capacity
À −7 °C outside, with water at 35 °C, the Midea delivers 45,377 BTU/h and gives 2.7 times more heat than the electricity it uses.
The spec sheet shows less at +2 °C than at −7 °C: frost builds up most on the outdoor unit around 0 °C, so it defrosts more often.
| Outdoor temperature | Supply water | Capacity | Output | COP |
|---|---|---|---|---|
| +7 °C | 35 °C | 54,589 BTU/h | 16 kW | 4.5 |
| +2 °C | 35 °C | 44,353 BTU/h | 13 kW | 3.5 |
| −7 °C | 35 °C | 45,377 BTU/h | 13.3 kW | 2.7 |
| −15 °C | 43.3 °C | 33,780 BTU/h | 9.9 kW | 2.06 |
| −25 °C | — | Heating operating limit; no published capacity | ||
Source: Midea M Thermal Arctic Split 16 kW submittal sheet, January 2026; the −15 °C point matches the NYS Clean Heat listing. The other brands don’t publish a curve on their spec sheets: their heating limit appears in the chart in the Compare section.
08 · Who it’s for
An air-to-water heat pump is for homes heated with water.
Oil-fired or electric boiler, radiant floor, radiators: your emitters stay. With no water loop, a wall-mounted or central heat pump is simpler, and it can qualify for LogisVert.
Ideal
Oil-fired boiler
The heat pump replaces it; your radiators or floors stay.
Ideal
Radiant floor
Low temperature: the best efficiency you can get.
Very good
Electric boiler
It can stay on as backup in extreme cold.
Stays in place
- Radiators and radiant floors
- Distribution piping
- Zone thermostats (24 V compatible on the Midea)
After
- Outdoor unit on a raised base
- Wall-mounted hydronic module (split)
- Buffer tank and electric backup heat if needed
Who does what
Us: outdoor unit, refrigerant line, electrical. Our licensed hydronic heating partner: water loop and removal of the oil-fired appliance.
09 · The right size
Air-to-water heat pump in 2.5, 5 or 7 tons: your floor area gives you the ballpark.
Slide to your heated area. The room-by-room heat loss calculation settles it at the visit.
800 sq ft5,000 sq ft
2.5 t30,000 BTU · 2 models
5 t54,500 to 60,000 BTU · 7 models
7 t82,000 BTU · 2 models
AirGreen rule: about 18,000 BTU/h per 1,000 sq ft, adjusted at the visit for insulation, windows and ceiling height. At −15 °C, a 5-ton unit delivers less than its rating (33,780 BTU/h for the Midea), hence the backup heat.
Ballpark
5 tons · 54,500 to 60,000 BTU
Estimated need: about 39,600 BTU/h for 2,200 sq ft.
7 models at this size
Midea M Thermal Arctic 5 tonsSplitGree Versati IIISplitGree Versati IVMonoblocHydro Solar Split 5 tonsSplitHydro Solar Monobloc 5 tonsMonobloceffiQueenc 5-ton splitSpliteffiQueenc 5-ton monoblocMonobloc
Get my home calculated 10 · A year at your place
Twelve months with an air-to-water heat pump.
In winter it heats, in spring it handles your hot water, in summer it can cool. Tap a month.
Jan.
Full heating
The coldest weeks: the heat pump heats, and the electric backup helps during peaks. You clear the snow around the unit.
11 · Buffer tank and backup heat
The two parts people often forget, and the ones that make you comfortable.
The buffer tank holds a reserve of hot water; backup heat takes over in extreme cold. Both are decided when the loop is designed.
Without a buffer tank, when a single small zone calls for heat or during a defrost, the compressor starts and stops often: more wear, less comfort.
Backup heat, for extreme cold
A heat pump’s capacity drops as it gets colder. Electric backup heat fills the gap: on the Midea, a 3 kW element is factory-installed in the module. Its size is calculated at the visit, based on your heat loss.
Who installs it
The buffer tank, hydraulic separator and glycol are part of the water loop: they are installed by our licensed hydronic heating partner (15.4).
12 · Fresh air
It heats water, not air: your home still needs an air exchanger.
An air-to-water system doesn’t move air: nothing removes humidity or brings in fresh air. An air exchanger (HRV or ERV) takes care of that, recovering heat from the outgoing air. We install it with the same team (licence 15.8).
The exchanger brings in filtered fresh air and exhausts stale air. Its core recovers heat from the outgoing air: up to 83% at 0 °C on the RNC205, according to HVI.
HRV or ERV: how to choose
Fogged windows or a damp basement in winter?
Very dry air in winter, or air conditioning in summer?
HRVERV
Answer both questions.
We show you the type of exchanger that fits best, then confirm it at the visit.
Lifebreath 267 MAXHRV
Large house: 261 CFM net at 0.4 in., 22 W ECM motor
Recovery at 0 °C75 %
Recovery at −25 °C70 %
261 CFM · 22 W · ENERGY STAR: Yes
Lifebreath RNC205HRV
83% recovery at 0 °C, 69% at −25 °C
Recovery at 0 °C83 %
Recovery at −25 °C69 %
170 CFM · 58 W · ENERGY STAR: Yes
Venmar A160E65RTERV
Drainless ERV, 15 W, keeps some of the humidity in winter
Recovery at 0 °C76 %
Recovery at −25 °C56 %
142 CFM · 15 W · ENERGY STAR: No
HVI data and manufacturer spec sheets, carried over into our product pages.
13 · Grants
Air-to-water heat pump grants as of October 2, 2026: what we know, no sugar-coating.
For an air-to-water heat pump, none of the programs below pays out any assistance today. We’d rather tell you before the visit.
Hydro-QuébecAir-to-air only
LogisVert · heat pump
$0 for air-to-water
The measure covers ENERGY STAR certified central or wall-mounted air-to-air heat pumps. Air-to-water heat pumps are not included.
All the LogisVert rulesGovernment of QuébecEnded
Chauffez vert
No longer offered
Assistance for converting from heating oil or propane ended on March 31, 2026. No application received after that date is accepted.
Our Chauffez vert pageGovernment of CanadaClosed
OHPA · oil to heat pump
No new applications
Last applications accepted July 31, 2026. A file already approved must be completed by January 31, 2027 at the latest.
Our OHPA pageGovernment of QuébecOpen, heating excluded
Rénoclimat
Depends on the work
Insulation, air sealing, doors and windows. The program no longer funds heating systems.
Our Rénoclimat pageAir-to-water assistance
0 $
LogisVert targets ENERGY STAR air-to-air heat pumps; none of our air-to-water units is ENERGY STAR certified.
121
days before January 31, 2027, the deadline for already-approved OHPA files
Warning. Hydro-Québec never solicits by phone or door to door for LogisVert.
All grants14 · Installation
Air-to-water heat pump installation across Greater Montréal, Laval, Longueuil, the South Shore and the North Shore
Our step-by-step guide, from the first conversation to the quality check. Our refrigeration technicians handle the outdoor unit, the refrigerant line and the electrical; the water loop goes to a licensed hydronic heating partner (15.4), and we tell you so in the estimate.
Consultation
AirGreenYou call us or fill out the form: we talk about your current heating, your heat emitters and your hot water and air conditioning needs.
Who does what
| Work | Done by |
|---|---|
| Outdoor unit and raised base | AirGreen |
| Refrigerant line (split) | AirGreen |
| Electrical circuits | AirGreen |
| Air exchanger | AirGreen |
| Hydronic module water connection | Licensed 15.4 partner |
| Buffer tank, separator, glycol | Licensed 15.4 partner |
| Removal of the oil-fired boiler and tank | Licensed 15.4 partner |
| Clear the snow, read the pressure gauge | You |
RBQ licence 5645-9605-01: 15.8 Ventilation, 15.10 Refrigeration, 16 Electrical. Hydronic heating falls under subclass 15.4.
Before the visit
Have a few photos ready: the visit goes faster.
- Your boiler and its nameplate
- Your circulators and zone valves
- Your electrical panel, door open
- Where you plan to put the outdoor unit
15 · Why AirGreen
Why choose AirGreen for your air-to-water heat pump installation.
Montréal, Laval, Longueuil, the South Shore and the North Shore: one team, from the estimate to after-sales service.
Local expertise
A Montréal family business, our own refrigeration technicians, and extreme-cold figures read off the manufacturers’ spec sheets, not promises.
Tailored solutions
Every installation starts with a room-by-room heat loss calculation and your existing water loop.
Year-round support
The same team handles annual maintenance and after-sales service, season after season. Mon. to Thu. 8 a.m. to 6 p.m., Fri. 8 a.m. to 4 p.m.
Installation excellence
Outdoor unit on a raised base, clear of the snow; commissioning and heating curve set for your home.
Sustainability
An air-to-water heat pump lets you leave heating oil behind without changing your radiators. The Midea uses R-32, with a global warming potential (675) well below that of R-410A.
The AirGreen family
RBQ licence 5645-9605-01, CMEQ member, $5M in civil liability insurance, and a final offer always sent before the work begins.
The AirGreen team in one minute
The video from our Contact us page: the refrigeration technicians who install your heat pump are the same people who answer you afterwards.
Services for Laval, Longueuil and beyond
Tap a region.
Air-to-water heat pump in Montréal
Head office at 4951 Sainte-Catherine St. East. Duplexes, plexes and water-heated homes: we assess the space for the outdoor unit and the route for the refrigerant line.
514 316-297316 · Maintenance
Air-to-water heat pump maintenance, season after season.
Check items off as you go: some are done by you, some by us, some by the water loop partner.
Your list
0 of 6
For guidance only: the manufacturer’s manual takes precedence. Book the annual outdoor unit maintenance at 514-316-2973.
Schedule maintenance17 · Frequently asked questions
Air-to-water heat pump: your questions, our verified answers.
14 questions
It captures heat from the outdoor air and transfers it to the water in your heating system: radiant floor, radiators or fan coils. It can also heat your domestic hot water and, with fan coils, cool your home in summer.
Conclusion · Your comfort, our mission
Your home heats with water. We’ll come see what it can do.
One visit, one heat loss calculation, a written estimate within 24 hours. The in-home estimate is 100% free.
Mon. to Thu. 8 a.m. to 6 p.m. · Fri. 8 a.m. to 4 p.m. · sales@airgreen.ca · Boucherville showroom: 514-316-3007 · Contact us
RBQ 5645-9605-01
Subclasses 15.8 Ventilation, 15.10 Refrigeration and 16 Electrical.
Free estimate
In your home, with nothing to sign during the visit.
Estimate within 24 hours
Written, after the visit, spelling out what each contractor does.
Midea and Gree
Midea Pro dealer and Gree Elite dealer.
Sources verified October 2, 2026.
- AirGreen product pages (Shopify metafields and descriptions), read September 30 and rechecked October 2, 2026.
- Midea, M Thermal Arctic Split 16 kW submittal sheet, January 2026; NYS Clean Heat, list of eligible air-to-water heat pumps, January 2026.
- Hydro-Québec, LogisVert program, residential customers: Heat pump measure (air-to-air only, ENERGY STAR since November 26, 2025), participant guide (version of September 10, 2026), page consulted October 2, 2026.
- Government of Québec, Chauffez vert, eligible work: assistance ended March 31, 2026.
- Natural Resources Canada, Oil to Heat Pump Affordability program (page modified September 17, 2026), per our page verified September 22, 2026.
- Air exchangers: HVI data and manufacturer spec sheets, carried over into our product pages.
- Global warming potential of refrigerants: R-32 675, R-410A 2,088 (IPCC, Fourth Assessment Report, values adopted by Environment and Climate Change Canada).
Manufacturer spec sheets are authoritative. Program amounts and rules can change; only the responsible agencies can confirm the assistance granted. The sizes shown are ballpark figures, confirmed by the calculation done during the visit.
Related pages