Hitachi airHome Multi 5-Zone Wall-Mounted Heat Pump | 42,000 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): 58.0 dB(A)

The smart multi-zone that adapts to your home and our climate

At AirGreen, we install the HITACHI airHome Multi 5-zone wall-mounted heat pump (42,000 BTU compressor) throughout Montreal, Laval, Longueuil, North Shore and South Shore , to provide precise room-by-room comfort, tangible energy savings and careful air quality. This system is ideal for Montreal homes with varying volumes: corner condos with lots of windows, converted duplexes, multi-story cottages, home offices or rental units.

4-season comfort, room by room, without compromise

The airHome Multi can cool and heat up to 5 independent zones with a single R-32 outdoor compressor. Each indoor head has its own set point, fan speed, and settings. You can turn off an unoccupied bedroom while the family room is running at full capacity: it's à la carte comfort, with a direct impact on your energy bill. Performance is designed for Quebec: continuous heating down to -20°C , SEER2 up to 23.0 , and HSPF2 up to 7.85 depending on configuration. PM2.5 filters, FrostWash (self-cleaning of the exchanger), Mold Guard (automatic drying after cooling), and the R-32 leak sensor complete the package for stable indoor air quality and simplified maintenance.

The essentials in 5 points (AirGreen field version)

1. Power & Range
   • RAM-G42N5HAA outdoor unit: 42,000 BTU in cooling (min-max: 7,000-46,000), 45,000 BTU in heating (min-max: 9,000-51,000).
   • Operation -20°C to +24°C in heating , -10°C to +46°C in air conditioning .
   • Exterior noise level: 58 dB(A) (full power).

2. Up to 5 mixed heads (wall-mounted 400/650, mini-cassette, console "Floor", ducted "Ducted") from 7,000 to 24,000 BTU each. Ex. popular codes: RAK-DJ07/09/12/18/24 , RAK-GJ07/09/12/18/24 , mini-cassette RAI-GJ , console RAF-FJ , ducted RAD-GJ .

3. Refrigerant ranges adapted to Montreal buildings
   • Max total length: 262 ft (80 m) , total elevation: 75 ft (23 m) , inter-unit: 82 ft (25 m) , min length: 16 ft (5 m) .
   • Liquid connections 1/4" x 5 , gas 3/8" x 3 + 1/2" x 2 , drain 1.02" .

4. Economy & Intelligence
   • Smart Eco / Auto-Off (presence detection), airCloud Go (optional Wi-Fi) to schedule, monitor and optimize.
   • SEER2 up to 23.0 ; HSPF2 up to 7.85 (cold region).

5. Sustainability
   • Anti-rust bodywork , blue-fins , reinforced PCBA , fireproof electrical boxes , 3 min anti-surge delay , anti-snow accessories .

Typical configurations we recommend in Montreal

• Closed multi-room apartments (3 bedrooms + office)
  7 + 7 + 7 + 7 + 9 kBTU: perfect balance for well-insulated family condos and townhouses.

• Open area + 3 bedrooms
  18k for the open area, 7 + 7 + 7k for the bedrooms: ideal for converted triplex with large living room-kitchen.

• Demanding open space (west-facing windows) + 2 bedrooms
  24 k for the living room, 9 + 9 k for the bedrooms: useful power reserve during heat waves.

• Discreet high-end mix
  1 mini-cassette (living room) + 1 ducted (hallway/bedrooms) + 3 wall-mounted: uniform comfort, aesthetics preserved.

Good to know: in multi-zone systems , the compressor power is distributed between the active heads. We therefore size each zone for simultaneous load so that the heating remains comfortable during intense cold.

Air quality and maintenance: what you gain every day

• FrostWash : programmed frost/defrosting of the exchanger to expel dust and bio-contaminants, maintaining air flow and limiting loss of efficiency over time.

• Mold Guard : Automatic drying ~60 min after cool/dry mode to counteract residual moisture and odors.

• PM2.5 + ViroSense S filters : captures fine particles, anti-VOC , inhibits viruses/bacteria and blocks mold growth – a real plus for sensitive families and teleworkers.

• R-32 leak sensor : integrated visual/audible alert (or via optional receiver), securing the installation.

RAM-G42N5HAA Outdoor Unit Key Specifications (Pro Summary)

• Voltage 208-230 V / 1 Ph / 60 Hz , MOP 50 A (3-5 units) , MCA 30 A (3-5 units) .

• Dimensions : 37.4 × 37.2 × 14.6 in (W×H×D). Net weight ~216 lb.

• Sound level : 58 dB(A). Freon R-32 .

• Operating ranges : cold -10 to +46°C / hot -20 to +24°C .

• Seasonal performance : SEER2 up to 23.0 , HSPF2 up to 7.2–9.2 depending on region/head configuration.

Our installation method (AirGreen feedback)

1. Free technical visit in Montreal – Laval – Longueuil – South Shore – North Shore to check pipe routes, drilling, differences in level, wall/cassette/console location, condensate drainage (slope/pressure), 240 V power supply and electrical protections.

2. Calculation of load zone by zone (orientation, glazing, floor, use). We avoid “12 kBTU everywhere” which over- or under-dimensions.

3. Line plan : compliance with minimum lengths and curvature radii , positioning of junction boxes and collectors to anticipate service.

4. Commissioning : vacuum <500 microns, leak test, oil compensation if required, distribution configuration , training in use (modes, filters, airCloud Go app, best practices).

5. Follow-up : maintenance reminder and periodic cleaning of filters/evaporators to maintain efficiency and silence.

AirGreen Real Cases

• Plateau-Mont-Royal, renovated duplex (2 floors + basement)
  Configuration 18 k (open area) + 9 k + 7 k + 7 k + 7 k . Result: measured reduction of 28% in electric heating consumption in winter, stable comfort in the open staircase.

• Corner condo in Griffintown, large bays West
  24k in the living room + 9k + 9k + 7k + 7k . In a heatwave, the living room remains below 24°C without excessive noise. Satisfied customer of Mold Guard : disappearance of recurring damp odors at the end of summer.

• Single-family home in Boucherville (home office)
  Mini-cassette mix in the living room, ducted for the bedroom corridor, 3 wall-mounted . Result: uniform comfort, preserved aesthetics, very low perceived noise when teleworking.

Mistakes to Avoid (Frank Advice)

• Undersize the open area or oversize the rooms : the feeling of draft increases and the regulation modulates poorly.

• Neglecting condensate drainage (slope, pump, frost): a classic cause of alerts and minor damage.

• Ignore cumulative lengths/heights : beyond the limits, performance drops and the compressor works harder.

• Multiplying small, useless heads : a correctly sized head is better than a string of poorly used 7 kBTUs.

Quick Technical FAQs

• Built-in Wi-Fi? The airCloud Go option connects via adapter; it allows for scheduling and energy monitoring.

• Indoor noise? The 400/650 series go down to 27–29 dB(A) at their lowest: almost inaudible, perfect for a bedroom.

• Air quality ? PM2.5 + ViroSense S + FrostWash + Mold Guard work together to limit particles, viruses/bacteria, and mold.

• Electricity ? 240V power supply, circuit breaker compliant with MOP/MCA currents. Our refrigeration engineers coordinate with your master electrician if necessary.

Why choose AirGreen?

We are a team of professional refrigeration engineers experienced in residential construction sites in Greater Montreal, with a strict sizing methodology , transparent pricing (final offer before work) and responsive after-sales service . No deposit : you pay at the end , when you are 100% satisfied .

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NEXT STEP
Ready to set up your HITACHI airHome Multi 5-zone 42,000 BTU ? Contact us for a 100% free on-site estimate in Montreal, Laval, Longueuil, North Shore, South Shore : (514) 316-2973 or sales@airgreen.ca We have the perfect combination for your space, starting this week.