Mini Split WILLIS HEATFINITY | 12,000 BTUs | Laval, Montreal
- WiFi: Included
- Warranty (Compressor - Parts - Labor): 10-10-0
- Additional Warranty: Possible
- Piping: 1/4 - 1/2
- Voltage: 220 V
- Sound Pressure Level (Outdoor): 52.0 dB(A)
- Sound Pressure Level (Indoor): 37 / 53 dB(A)
Designed for our winters, installed by local professionals
At AirGreen, we recommend the WILLIS Heatfinity 12,000 BTU wall-mounted heat pump to well-insulated condominiums, apartments, and homes in Montreal , Laval , Longueuil , as well as on the North Shore and South Shore . The unit maintains stable comfort down to -30°C in heating, provides efficient cooling from -29 to 50°C , and remains discreet on a daily basis thanks to its Inverter modulation. Our HVAC installation team takes care of sizing, installation, commissioning, and follow-up—with transparent pricing and responsive after-sales service .
The major assets, useful on a daily basis
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Extreme climate : reliable heating down to -30°C ; air conditioning from -29 to 50°C — perfectly suited to Montreal's reality.
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High efficiency : SEER2 24 (air conditioning) and HSPF2 9 (heating) — ENERGY STAR® (Cold Climate) .
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Quiet & comfortable : 37–53 dB(A) indoors; 52 dB(A) outdoors — ideal for condos and bedrooms.
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Even diffusion : 4-way airflow to limit cold areas.
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Connectivity : Wi-Fi included to control temperature, modes and schedules remotely.
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Grants : eligible for current programs; Hydro-Québec: $1,200 (depending on criteria).
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Warranty : 10-10-0 (Compressor-Parts-Labor), with labor extension available from AirGreen.
What to expect at home
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Constant comfort : automatic modulation to avoid on/off cycles and temperature variations.
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Controlled humidity : dehumidification and ventilation modes to get through the heat waves in Montreal and Longueuil .
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Simple interface : clear remote control, optional wall controller , and Wi-Fi app to schedule your instructions.
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Careful finishing : insulated refrigeration lines, clean seals, safe condensate drainage.
Accurate sizing: the basis for a good result
The 12,000 BTU version is often suitable for:
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a 45–70 m² open-plan condo ;
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a well-insulated ground floor with open living room/kitchen;
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a home office requiring a stable temperature.
We systematically validate by calculating the load : surface area, insulation, infiltration, orientation, glazing, occupancy. The objective: to avoid oversizing (too short cycles, poorly managed humidity) as well as undersizing (discomfort during cold peaks).
Optimal location of the indoor unit
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Height : high installation, clearances respected, away from curtains and obstacles.
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Radiation : target the main living area; limit direct blowing onto occupants.
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Air path : avoid blind spots; promote circulation to adjacent rooms.
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Aesthetics : harmonized duct covers, discreet pipe routing.
Silence and sound comfort
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37–53 dB(A) indoors (from whisper to quiet office depending on speed).
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52 dB(A) outdoors, with anti-vibration mounts to maintain peace and quiet.
Our installers optimize the layout to combine acoustic comfort and performance.
Control & Connectivity
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Wi-Fi included : remote control, time programming, night mode.
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Useful modes : heating , air conditioning , dehumidification , ventilation , automatic .
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Practical functions : timer, low voltage start , intelligent defrost , self-diagnosis , lock , washable filters .
Performance, efficiency and smart sizing
Modulation = comfort + savings
The inverter compressor continuously adapts its speed. Concrete results: stable temperature, optimized consumption , reduced component wear. The Heatfinity 12 k module:
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Air conditioning : approx. 3,070 to 14,100 BTU/h , nominal 12,000 BTU/h .
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Heating : approx. 3,071 to 15,500 BTU/h , nominal 12,000 BTU/h .
This range allows us to closely monitor real needs, from spring to the heart of winter.
Readable energy efficiency
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SEER2 24 : less energy for the same freshness in summer in Laval and on the South Shore .
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HSPF2 9 : very good winter performance on the North Shore , limiting the electrical backup.
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Peak indicators: EER ≈ 3.66 W/W and COP ≈ 3.81 W/W (varies depending on conditions).
Technical sheet useful for installation
Identifiers & Compliance
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Models: PUHW12KCH24S2-I (indoor) / PUHW12KCH24S2-O (outdoor)
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ENERGY STAR® (Cold Climate) — performance requirements met
Capacities & acoustics
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Nominal air conditioning: 12,000 BTU/h (modulation indicated above)
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Nominal heating: 12,000 BTU/h (modulation indicated above)
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Indoor: 37–53 dB(A) · Outdoor: 52 dB(A)
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Indicative airflow: ≈ 230–400 CFM (depending on speed)
Implementation & connections
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Piping : 1/4" – 1/2" · Max length : 66 ft (≈ 20 m) · Elevation : 33 ft (≈ 10 m)
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Refrigerant : R-410A (typical addition 0.2 oz/ft beyond the included length, if required)
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Power Supply : 208–230 V, 60 Hz, 1 Ph · MCA/MOCP : 10/15 A · Cable: 14 AWG × 4 stranded
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Dimensions
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Interior: 34.4 (W) × 11.5 (H) × 8.3 (D) in
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Exterior: 31.6 (W) × 21.8 (H) × 13.8 (D) in
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Good practice in winter: raise the outdoor unit above the snow line; provide adequate rear and side clearance; direct the defrost drain away from driveways to limit ice.
Our installation method: rigorous, clean, documented
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100% free on-site estimate and load calculation .
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Choice of location : comfort, silence, aesthetics and future maintenance.
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Controlled drilling and sealing (weatherstripping, seals).
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Insulated refrigeration lines , continuous condensate slope (drain heating if passing through a cold zone).
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Controlled vacuum (deep vacuum), maintenance and leak test.
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Compliant electrical connections (dedicated circuit, suitable gauge).
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Commissioning : checks, sensors, cycles, defrosting .
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Wi-Fi connection and training in use.
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Cleaning of the site and delivery of a photo/serial number file .
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Follow-up : usage advice, HVAC maintenance schedule.
AirGreen Case Studies
Montreal (Plateau-Mont-Royal) — Crossing condo, 58 m²
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Context : load-bearing wall limiting the installation; requirement for silence in the evening.
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Solution : indoor unit placed above the central corridor, anti-vibration supports, 9 m refrigeration line; condensate drainage with continuous slope towards the outside.
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Results (2 months): 23°C maintained at −24°C outside without additional heating; humidity 42–45% in summer; perceived noise ≈ 39 dB in Auto mode; winter bill estimated to be ~20% lower than baseboards.
Longueuil (bungalow, open area) — Living room/kitchen, 68 m²
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Context : open rooms, large south-facing windows; need for coolness in summer and stable heating in winter.
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Solution : Heatfinity 12k , matching duct covers; 12m line with measured refrigerant addition ; optimized clearances.
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Results (full season): continuous temperature 22–23 °C ; consistent comfort right down to the bottom of the corridor; significant reduction in short cycles; very good support at −20 °C .
The observed performances reflect our frequent field visits to Montreal , Laval and Longueuil . Each building is unique, so results may vary.
Grants, funding & applications
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Hydro-Québec : $1,200 for this model (depending on eligibility criteria and program updates).
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We will work with you to manage the registration , AHRI proof/serial numbers , photos and invoicing requested.
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Financing available; options upon request depending on the scope of work.
Scheduled maintenance: simple and profitable in the long term
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Washable filters : regular rinsing in season (monthly recommended during periods of intensive use).
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Batteries : Periodic professional dusting/washing to maintain performance.
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Condensates : check slope and siphons; drain heating if necessary.
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Exterior : careful snow and ice removal (without obstructing the fins).
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Annual visit : pressure check, leak test, parameter update (including defrosting ), internal cleaning, complete functional test.
Common Mistakes — and How We Avoid Them
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Oversizing : short cycles, discomfort; we size by calculation.
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Bad location : direct blowing on the sofa/bed; we place intelligently.
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Poorly managed condensates : risk of overflow; we ensure a constant slope and safety measures.
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Excessive refrigeration line : losses and frost; we optimize the route and insulation.
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Inadequate electrical protection : trips; we validate the rating, circuit breaker and wiring.
Who this model suits — and who it suits less
Ideal for
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Urban condos in Montreal (Plateau, Centre-Sud, Griffintown) aimed at 4-season comfort .
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Plex and townhouses in Laval (Chomedey, Duvernay) or on the North Shore ( Boisbriand , Terrebonne ).
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Houses on the South Shore ( Longueuil , Boucherville) with open-plan main rooms.
To be reconsidered
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Highly compartmentalized homes where a single head does not provide good coverage; a multi-zone solution may be required.
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Buildings with very little insulation or with significant air infiltration: envelope work may be more cost-effective before installation.
Frequently Asked Questions
Can 12k heat my entire home?
Often yes for an open condo. If several closed rooms, we evaluate a second head or a multi-zone configuration.
And in case of extreme cold?
The appliance heats up to -30°C ; efficiency naturally decreases at extreme temperatures. Correct sizing and a good envelope ensure comfort.
Is the noise bothersome?
No. At 37–53 dB(A) indoors, operation remains quiet. We adjust the placement and supports for quietness.
Is Wi-Fi really useful?
Yes. You can adjust your settings, schedules, and modes remotely—a handy way to reduce consumption while you're away.
What is the installation time?
Generally fast during off-peak seasons. We adapt to your availability.
Who handles the grant paperwork?
We — from eligibility to file submission , to make your life easier.
Next step: let's talk about your project
Want stable comfort in both winter and summer in Montreal , Laval , Longueuil , on the North Shore and the South Shore ? Contact AirGreen for a 100% free on-site estimate . We size, install and provide HVAC maintenance for your WILLIS Heatfinity 12,000 BTU with clear and lasting follow-up.