HITACHI airHome Multi 3-Zone Wall-Mounted Heat Pump | 36,000 BTU Compressor

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• WiFi: Optional
• Warranty (Compressor - Parts - Labor): 10-10-0 years
• Additional Warranty (10-10-10): Possible
• Voltage: 220 V
• Sound Pressure Level (Outdoor): 56.0 dB(A)

Designed for Montreal winters, calibrated for the heavy summers of the St. Lawrence
The HITACHI airHome Multi 3-zone wall-mounted heat pump (36,000 BTU compressor) is designed for homeowners who want stable, cost-effective 4-season comfort without compromising indoor air quality. At AirGreen, we install this multi-zone system for triplexes, condos, and single-family homes in Montreal, Laval, Longueuil, the North Shore, and the South Shore , adapting it to the actual room configuration and heating/cooling priorities of each household.

Why this 36,000 BTU is a game changer
At the heart of the system, the RAM-G36N4HAA outdoor compressor controls up to 3 indoor heads (expandable to 4 if needed) and allows independent cooling and heating of zones —each with its own setpoint, fan speed, and schedules. This is the strength of a multi-split : you send energy where it is needed , instead of supplying the entire house uniformly. The result: energy savings , silence in unused rooms, and precise comfort in occupied areas.

HVAC installation in a real context: our AirGreen approach

• On-site technical visit (free) to validate the refrigerant lengths, the condensate slope , the 220 V power supply , the location of the compressor (clearances, noise, snow).

• Sizing by zone : we combine 7,000, 9,000, 12,000, 18,000 or 24,000 BTU heads according to the thermal load of each room (orientation, glazing, insulation, use).

• Winter calibration : we take into account the power available when several heads are operating at the same time to avoid undersizing in January.

Optimized for our climate: key figures to know

• Heating operating range : down to −20°C — an essential point for our winters.

• Seasonal efficiency : up to SEER2 23.0 in cooling and HSPF2 up to 7.85 depending on configuration—values ​​that translate into lower energy bills .

• R-32 refrigerant : reduced fluid charge and better mass efficiency compared to R-410A.

• Exterior noise level : 56 dB(A) for the RAM-G36N4HAA — we validate the location (shared wall, interior courtyard) to preserve peace and quiet.

• Indoor airflow and quietness : Depending on the airHome 400/650, Floor, Ducted or Mini-Cassette models, levels drop to 22–29 dB(A) —suitable for bedrooms and offices.

What really sets the airHome Multi range apart

1. Integrated air quality
   The indoor units use PM2.5 activated carbon filters (anti-VOC, deodorization) and ViroSense S filters (inhibit viruses and bacteria; stop mold growth) to purify the air every day. For Montreal and its busy boulevards, this makes a tangible difference in the front rooms.

2. Sustainable internal cleanliness
   The heat exchangers benefit from FrostWash , a freeze/defrost process that removes contaminants accumulated on the coil, maintaining airflow and efficiency over the long term. The Mold Guard function automatically dries the components after the cool/dry mode to limit odors and mold—very useful in homes with high summer humidity .

3. Safety and peace of mind
   An integrated R-32 leak sensor (with visual/audible alarm depending on the model) provides early detection , complemented by a fire-resistant electrical jacket , anti-corrosion treatment of the fins and anti-rust paint on the exterior casing. These design choices are designed for longevity in our snow, salt and freeze/thaw conditions.

4. Smart piloting
   With the airCloud Go Wi-Fi adapter (SPX-WFA01, optional) , you can program schedules, monitor consumption and activate Smart-Eco / Auto-Off modes thanks to the presence detector integrated on certain models ( airHome 650 , Mini-Cassette ). Practical for owners who rent out part of the accommodation or who have a home office .

3-Zone Setups That Really Work in Montreal

• 9,000 + 9,000 + 12,000 BTU : typical two-bedroom + open living area condo (Rosemont, Griffintown). Exemplary cold comfort in summer; reliable supplemental heating in winter, especially if the envelope is correct.

• 7,000 + 12,000 + 18,000 BTU : bedroom + office + large living room/kitchen with southwest windows (Ahuntsic, Villeray). The 18k covers heat peaks and maintenance in the off-season.

• 12,000 + 12,000 + 12,000 BTU : Renovated plex with three large closed rooms (Hochelaga, Verdun). Balanced distribution when the three zones are running at the same time.

According to the multi-split technical sheet , you can mix five types of units ( airHome 400/650 wall-mounted, Floor console , Mini-Cassette , Ducted ducted ). In practice, we combine wall-mounted units in the bedrooms (silence and simplicity) and Mini-Cassette or ducted units in the living areas when the architecture allows it.

AirGreen Case Studies (Local Examples)

1. Condo in Brossard (DIX30 sector) – 9 + 9 + 12
   Problem: overheating in summer on the west side, street noise in the evening.
   Solution: two 9k heads in the bedrooms for optimal silence , 12k in the open area. airCloud Go to automatically lower the temperature in the evening. Result: significantly lower electricity consumption during heat waves and more restful sleep (closed windows, filtered air).

2. Townhouse in Outremont – 7 + 12 + 18
   Problem: large bay windows facing south, cathedral living room .
   Solution: 18k in living room for solar charges, 12k in the inhabited basement, 7k in the master suite. Mold Guard appreciated after the frequent dehumidification mode; the air remains odor-free , even in August.

3. Duplex in Laval (Chomedey) – 12 + 12 + 12 (co-ownership)
   Problem: co-owners wishing to share the exterior layout and reduce noise on the alley side.
   Solution: positioning of the RAM-G36N4HAA on an anti-vibration support away from snowplows, R-32 pipes optimized (lengths, heights) within the manufacturer's limits; result: uniform comfort , 56 dB(A) not perceptible in the bedrooms at night.

Frequently asked questions we receive — and our candid answers

“Is 36,000 BTUs too much for my home?”
Not if you are powering three large zones and the house has significant winter loads . The multi-split modulates and distributes the power; the issue is not peak power, but balance between zones and simultaneous operation .

“And when it’s -20°C?”
The airHome Multi series maintains heating down to -20°C . In periods of prolonged cold , we simply validate that your main system (baseboards, furnace, etc.) serves as a backup if necessary—a matter of prudent redundancy.

“Will the noise disturb the neighbors?”
The 56 dB(A) of the RAM-G36N4HAA condenser is controlled in real life with a good choice of location , a stable panel and, if necessary, anti-vibration pads . Indoors, depending on the cassettes/wall units, it drops to 22–29 dB(A) at low speed—ideal for a child's room .

“Can I mix wall-mounted and ducted units?”
Yes. The airHome Multi concept is flexible : we "mix" unit types to preserve aesthetics (invisible ducted units in the living room, wall-mounted units in bedrooms) while controlling costs.

Best Installation Practices (and Mistakes to Avoid)

• Plan for snow : clearance under the outdoor unit to avoid burial; deflector possible if the roof thaws.

• Impeccable drain slopes : condensates must be evacuated by gravity or reliable pump (annual maintenance recommended).

• Clean drillings : sealed sleeves to prevent the infiltration of humid air in winter (source of frost behind the wall head).

• Pipe lengths/heights : respect the cumulative limits (total length, difference in level, length between units) and the liquid/gas diameters prescribed for each pair.

• Dedicated 220V electricity with circuit breaker according to MOP/MCA of the 36k model.

• Leveling the substrate : An uneven slab transmits vibrations and can create a noticeable flapping in adjacent rooms.

• Smart setup : enable Smart-Eco / Auto-Off in low-occupancy areas and schedule time slots via airCloud Go (optional) to avoid unnecessary reminders.

Simple…but strategic HVAC maintenance
Annual maintenance extends the life of the system and maintains performance: cleaning the filters , inspecting the evaporator (effect of FrostWash ), checking the condensate pump , checking the R-32 connections (reinforced leak sensor), testing the modes (heating, cooling, dehumidification) and updating the Wi-Fi if used. This ensures optimal air flow , healthier indoor air and a stable bill all year round.

Why choose AirGreen for your installation in Montreal and surrounding areas?

• Multi-zone expertise : We size based on simultaneous operation , not just nominal BTUs.

• Aesthetic integration : Mini-Cassette in the living room, sober wall lights in the bedrooms, discreet ducted air conditioning if the structure allows it.

• After-sales support : seasonal adjustments, airCloud Go advice, optimization of eco modes .

• Transparency : clear prices before work, no advance payment - you pay at the end , when you are satisfied.

NEXT STEP
Looking for a 3-zone HVAC solution that combines efficiency , air quality , and flexibility for your home or condo in Montreal, Laval, Longueuil, North Shore, or South Shore ? The HITACHI airHome Multi 36,000 BTU is a solid choice for managing different volumes, reducing energy costs, and achieving quiet comfort year-round.
Contact AirGreen today at 514-316-2973 or by email at sales@airgreen.ca for a 100% free on-site estimate and precise sizing of your three zones.