HITACHI airHome Multi 4-Zone Wall-Mounted Heat Pump | 36,000 BTU Compressor

• BROCHURE FRANÇAIS
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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)

High-performance quad-zone for 4-season comfort in Montreal, Laval, Longueuil, North Shore and South Shore

At AirGreen, we install the HITACHI airHome Multi 4-zone wall-mounted heat pump (36,000 BTU compressor, outdoor model RAM-G36N4HAA) for homeowners who want to cool and heat up to four rooms independently while preserving the aesthetics and energy performance of their home. This multi-split system combines efficiency , indoor air quality , and installation flexibility to meet the needs of typical apartments, condos, and houses in the greater Montreal area—from 4 1/2 units in the Plateau to cottages in Laval, including condominiums in Brossard and Longueuil.

Why Hitachi's 36,000 BTU airHome Multi is a strategic choice for a 4-zone project

What you get, concretely

• 4 independent zones (Quad Zone) to adjust the temperature room by room : living room, kitchen, bedrooms, office or basement.

• Wide range of compatible indoor units ( airHome 400/650 wall-mounted, Mini-Cassette , Ducted , Console Floor ) to choose the ideal format for each room and its style.

• Stable heating mode down to −20°C for reliable comfort during Montreal's cold snaps.

• High seasonal efficiencies : SEER2 up to 23.0 in cooling and HSPF2 up to 7.85 in heating, to reduce energy consumption and costs .

• R-32 refrigerant and integrated leak sensors on the indoor unit side: increased safety and easier maintenance.

• Improved air quality : active PM2.5 filters (anti-VOC, anti-odor) and FrostWash technologies (self-cleaning of the exchanger) and Mold Guard (automatic drying after cooling to limit odors and mold).

• Noise reduction : Typical outdoor sound pressure level ≈ 56 dB(A) ; several indoor heads go down to 27–29 dB(A) for very quiet rooms .

• Connectivity : airCloud Go (optional) to schedule, remotely control, and track your energy trends from your phone.

4-Zone Head Configurations: Our Recommendations by Home Type

The 36,000 BTU compressor accepts a wide range of 7k/9k/12k/18k/24k combinations. Here are some proven scenarios in Greater Montreal:

Well-insulated condo (900–1,100 sq. ft.)

• 9 + 9 + 9 + 12 kBTU (all airHome 400/650 wall-mounted)

  • Living room/kitchen : 12k

  • Master bedroom : 9k

  • Desktop : 9k

  • Secondary bedroom : 9k
    Advantage : very quiet for night rooms, precise room-by-room control , excellent efficiency .

Townhouse (1,200–1,600 sq ft) with open concept and finished basement

• 9 + 12 + 12 + 18 kBTU (mix wall + cassette or console depending on the aesthetics)

  • Open area on the ground floor : 18k ( 650 wall or Mini-Cassette for uniform 4-way diffusion)

  • Master bedroom : 12k

  • Room 2 : 12k

  • Basement/office : 9k
    Advantage : better air distribution in the large space, uniform comfort even when heating at –15°C/–20°C.

Cottage with large glass facade facing west

• 9 + 9 + 12 + 24 kBTU (24k in the sunniest area)
  Advantage : we slightly oversize the area most exposed to summer overheating and winter heat loss, while keeping some margin when several rooms require heating simultaneously.

Good to know about multi-zones : the total capacity of the compressor is distributed between the heads according to demand. In very cold weather, choose a slightly more generous head for the rooms that are most used (open plan, cathedral living room, large windows).

Examples of AirGreen installations (feedback)

• Rosemont–La Petite-Patrie (triplex converted into a condo) : 9 + 9 + 9 + 12 configuration with four airHome 400 wall units. Result: significant reduction in noise at night (measured by the client) and better humidity control in July/August thanks to the dry mode.

• Laval (Duvernay, renovated 1950 cottage) : combination 18 (Mini-Cassette in the living room ceiling) + 12 + 9 + 9. The 4-way blower uniformized the temperature in the open area, eliminating hot spots near the kitchen.

• Brossard (corner unit, West window) : 24 + 12 + 9 + 9 with airCloud Go . The customer programs a 30-minute pre-cooling before returning. Observation: reduced consumption peaks and more stable comfort .

Air quality: a decisive asset in our climates

• Active PM2.5 filters : reduction of fine particles and anti-VOC for sensitive interiors (working from home, children's bedrooms).

• FrostWash : Self-cleaning cycle that freezes and then defrosts the exchanger to remove dust and contaminants and maintain airflow over time.

• Mold Guard : Automatic drying after cooling/dehumidification to limit odors and mold regrowth in the unit.

These elements make a real difference in Montreal, where summer humidity spikes and extended heating periods promote equipment fouling and respiratory discomfort.

RAM-G36N4HAA Compressor (36,000 BTU) Key Technical Details

• Operating range : cooling approx. 14 to 115 °F (≈ −10 to +46 °C); heating approx. −4 to 75 °F (≈ −20 to +24 °C).

• Exterior acoustics : approx. 56 dB(A) at high speed.

• Connection lengths : total up to ~230 m (≈ 230 ft → 230 ft total, total height ~66 ft, inter-unit connection ~82 ft, minimum lengths 16 ft ).

• Refrigerant connections (typ.): liquid 1/4" × 4 , gas 3/8" × 3 + 1/2" × 1 .

• Power supply : 208–230 V / 1 Ph / 60 Hz .

• Refrigerant : R-32 .
  These parameters allow us to optimize piping routes in Montreal plexes, while minimizing pressure losses and keeping the outdoor unit discreet on the yard or roof.

How to properly configure your four rooms: our residential engineering tips

1) Measure the actual load, not just the square feet.
We evaluate orientation , windows , insulation , air infiltration , ceiling height , internal appliances (oven, lighting, occupants). Two rooms of the same size do not require the same BTU if one is due west and the other is due north .

2) Choose the right type of indoor unit.

• airHome 650 wall units : presence sensor (Smart Eco/Auto-Off) to save energy when the room is empty.

• Mini-Cassette : 4-way diffusion ideal for open areas or offices .

• Ducted (gainable) : invisible , perfect for a corridor or a walk-in closet that supplies two small rooms.

• Console Floor : elegant alternative to radiators or for complex walls .

3) Anticipate winter.
At −15/−20°C, a multi-zone distributes the capacity: we size the main head (open area) with a margin to maintain comfort when several zones are heating at the same time.

4) Think acoustically.
For bedrooms: choose heads ≤ 29 dB(A) (airHome 400/650 at low speeds) and a position that avoids direct blowing onto the bed .

5) Plan for connectivity.
The airCloud Go (optional) allows remote control and fine programming . Useful for smoothing out energy peaks : light pre-heating in the morning in Longueuil, pre-cooling before returning to Laval.

Our AirGreen method: from estimate to commissioning

• 100% Free On-Site Estimate : We come to see your home in person in Montreal, Laval, Longueuil, North Shore and South Shore to validate the piping route , locations and 220 V electrical connection .

• Transparent pricing : you receive a final offer before work begins.

• Professional refrigeration engineers : all our technicians are experienced , which reduces unforeseen events and speeds up after-sales service .

• Payment at the end : no deposit - you pay when you are satisfied .

• Contact details :

  • Montreal – Laval : (514) 316-2973 – 4951 Rue Ste-Catherine Est, Montreal

  • South Shore (showroom) : (514) 316-3007 – 1370 Rue Joliot-Curie, Boucherville (Loc. 712)

  • sales@airgreen.ca

Frequently Asked Questions (useful excerpts)

Q: Can I mix head sizes?
A: Yes. It’s even one of the strong points of the Multi system : wall-mounted, cassette, console, ducted , depending on the needs of each room .

Q: And what about noise?
In practice, our customers find that the rooms are very quiet (≈ 27–29 dB(A) at low speed). The exterior at ~ 56 dB(A) is placed away from sensitive windows.

Q: How hot does it get?
The Multi maintains continuous heating down to -20°C , which covers the vast majority of cold days in Greater Montreal.

What we check during the visit

• Cable section and circuit breaker (208–230 V, 1 Ph, 60 Hz).

• Refrigerated path : cumulative lengths, total height and differences in level between units (compliance with limits).

• Condensate flow (slope, possible pump).

• Exterior footprint : free ventilation, snow evacuation, suitable wall/floor support .

• Head placement : blowing not directed towards the bedding, accessibility for maintenance.

Conclusion

For a 4-zone project combining energy efficiency , air quality , silence and architectural flexibility , the HITACHI airHome Multi 36,000 BTU is one of the most balanced solutions that we install in Montreal, Laval, Longueuil, North Shore and South Shore . With a rigorous load study , the judicious choice of heads and professional commissioning , you benefit from controlled 4-season comfort - and optimized energy bills .

NEXT STEP
Ready to set up your quad-zone system? Contact AirGreen for a 100% free on-site estimate : (514) 316-2973 or sales@airgreen.ca Our teams in Montreal and on the South Shore (Boucherville) advise you on the best combination of heads and a clean and durable installation process .