HITACHI airHome Multi Dual Zone Wall-Mounted Heat Pump | 18,000 BTU Compressor

• BROCHURE FRANÇAIS
• BROCHURE ENGLISH

• WiFi: Optional
• Warranty (Compressor - Parts - Labor): 10-10-0 years
• Additional Warranty (10-10-10): Possible
• Voltage: 220 V
• Sound Pressure Level (Outdoor): 52.0 dB(A)

The ideal duo for two comfortable areas in Montreal, Laval, Longueuil, North Shore and South Shore

At AirGreen , we install the HITACHI airHome Multi DoubleZone wall-mounted heat pump (RAM-G18N2HAA, 18,000 BTU) for homeowners who want to cool and heat two separate spaces with a single outdoor compressor , without compromising on efficiency, silence and durability. With two wall-mounted heads to choose from (7,000 to 24,000 BTU) , advanced filters and a continuous heating range down to –20 °C , this system ticks the right boxes for our Montreal winters and summer heat waves. According to the official airHome Multi brochure: SEER2 up to 23.0, HSPF2 up to 7.85; FrostWash, Mold Guard, R32 leak sensor, optional Wi-Fi SPX-WFA01; performance chart and detailed dimensions for the RAM-G18N2HAA model (2 outlets) – outdoor sound pressure 52 dB(A).

Who is this DoubleZone for?

• Plateau and Rosemont townhouses : open-plan living room/kitchen + master bedroom.

• Bungalows in Laval/Vimont: Ground floor + finished basement.

• Condos in Longueuil/Brossard: living area + closed office.

• Duplex/Triplex on the North Shore (Terrebonne/Repentigny): two apartments to be treated independently.

What you actually gain with the HITACHI airHome Multi

1) Two zones, one compressor: flexibility and fine management

The RAM-G18N2HAA powers two indoor units that can be configured independently (setpoint, speed, modes). In summer, the unit operates in cooling mode (cold, dehumidification, ventilation). In winter, it switches to heating (or ventilation) mode . Page 2 of the brochure illustrates the multi-split principle and the freedom to mix wall-mounted, cassette, floor-mounted, or ducted heads depending on the room.

In practice at AirGreen
On a recent project in Ahuntsic , we installed 9,000 BTUs in the living room and 12,000 BTUs in the master bedroom. The client wanted a very quiet bedroom: we opted for an airHome 650 head (presence sensor, Smart-Eco and Auto-Off ), perfect for reducing consumption when the room is empty, without affecting the comfort of the living room. These "smart" functions are described on page 3.

2) Cleaner air and reduced maintenance

The airHome series integrates three very useful pillars for indoor air quality :

• FrostWash : a frost/defrosting procedure that sanitizes the exchanger and preserves air flow over time.

• Mold Guard : Automatic drying of approximately 60 minutes after cooling/dehumidification to counteract odors and mold .

• PM2.5 activated carbon and ViroSense S filters (depending on the heads), with reduction of fine particles and inhibition of viruses/bacteria .

These elements are clearly detailed on page 3 with the reduction percentages and the performance maintenance argument.

AirGreen Feedback – Brossard (South Shore)
In a southwest-facing condo (dust + traffic), annual maintenance showed cleaner-than-average coils. The client noted fewer odors during summer shutdown and less sneezing in the spring. FrostWash and Mold Guard reduced deep cleaning to once every 24 months instead of annually, while maintaining stable flow rates .

3) Performance and silence adapted to Greater Montreal

• Seasonal efficiency : SEER2 up to 23.0 and HSPF2 up to 7.85 (depending on combination).

• Continuous heating down to –20°C , a real asset in our cold spells.

• R-32 : more efficient refrigerant (less charge for the same capacity) and reduced footprint compared to R-410A.

• Compact outdoor unit : approx. 33.5 × 11.7 × 29.5 in (W × D × H), 52 dB(A) at its loudest – discreet for the alleys of the Plateau or balconies in Laval.

• Voltage 220 V , MCA 16 A , MOP 25 A : simple electrical sizing for most residences.

This data comes from the technical table on page 4 (RAM-G18N2HAA line) and the performance sections on pages 1 and 3.

Real case – Laval-des-Rapides
Recently insulated 1958 house: 7,000 BTU in the closed office + 12,000 BTU in the living room. Result measured by the client: –22% on his winter electricity bill vs. the previous year (baseboards still present but very little used). The exterior noise level also convinced the neighborhood: no complaints, even during defrosting.

4) Durability and protection

The rust-proof outer shell , Blue-Fin fins , reinforced electronic card , fire-resistant electrical enclosure and anti-snow accessory (option) are highlighted in the brochure ( page 3, "air is durability" ). For Montreal, Laval and the North Shore , snow protection is crucial: we raise and fair the compressor to prevent powder from being sucked in and preserve the pressure switches during storms.

5) Connectivity and security

• airCloud Go (Wi-Fi SPX-WFA01, option) : programming, energy monitoring, remote management ( page 3 ).

• R-32 leak sensor integrated into indoor units (visual/audible alarm); optional IR receiver and airPoint Room H700 available depending on configuration ( page 3 ).

• 3rd party thermostat possible in 5 wires (some limits).

These features allow for fine-grained management and increased security , useful for rentals or home offices .

6) Financial aid, guarantees and AirGreen options

• LogisVert Grant (Hydro-Québec): $745 for this DoubleZone (updated May 1, 2025, subject to eligibility).

• ENERGY STAR® : Yes for the series; Cold Climate : No on this DoubleZone 18k configuration (useful information for certain grants).

• Hitachi standard warranty : 10 years compressor – 10 years parts – 0 years labor .

• Additional AirGreen warranty (option): 10-10-10 possible (labor included).

• AHRI : 216097706 – clear traceability of the combination.

The guarantees and eligibility elements are listed on the panel on page 4 and at the top of the brochure.

Our AirGreen policy

• 100% free on-site estimate (Montreal, Laval, Longueuil, South Shore, North Shore).

• Transparent and final price before work : no surprises.

• Payment at the end when you are 100% satisfied .

• RBQ certified refrigeration technicians : clean installation, leak testing , deep vacuum , weight loading and superheat/subcooling verification for compressor longevity.

7) How to choose your two inner heads?

For an 18,000 BTU compressor , we generally recommend:

• 9k + 9k : two rooms ≈ 350–450 sq ft each, good insulation.

• 7 k + 12 k : bedroom/office + semi-open living room .

• 12 k + 12 k : two more demanding rooms (windows, height).

Compatible models listed : RAK-DJ07QHAA, RAK-DJ09RHAA, RAK-DJ12RHAA, RAK-DJ18RHAA, RAK-DJ24RHAA (400 series) and RAK-GJ07/09/12/18/24QHAA (650 series). Their flow rates, noise levels and dimensions are listed in the table on page 4 .

AirGreen Tip
In a triplex in Villeray , a corner bedroom overlooking the street (noise + PM sun) received an airHome 650 head (presence sensor = Smart-Eco ), while the living room received an airHome 400 (essential comfort, lower price). Result: uniform comfort , reduced noise , and optimized bill .

8) Mistakes to avoid (and how we prevent them)

1. Undersizing heating : In winter, demand increases and capacity is distributed among zones. At AirGreen, we simulate loads (orientation, insulation, glazing) and plan defrosting to avoid a lack of heat at peak times.

2. Refrigerant lines too long : the RAM-G18N2HAA limits the total length (see page 4 , 165 ft max) and the height differences . We optimize the routes , insulate correctly, and test with nitrogen .

3. Poorly managed defrost water discharges : we prepare the area under the compressor (draining base, clearances) to avoid ice and stains .

4. Structural noise : anti-vibration pads , drilling liners , dynamometer tightening torques : this is standard for us.

5. Bad choice of heads : we will mix 400/650/console/cassette if necessary depending on volume, echo, aesthetics ( variants described on page 2 ).

9) Maintenance, service and longevity

• Filter cleaning : 2–3 months (normal use) – stainless steel or dedicated filters depending on the model simplify maintenance ( see “Air Filter Type” columns on page 4 ).

• FrostWash + Mold Guard reduce soiling : professional maintenance every 18–24 months is often sufficient.

• Wi-Fi update : via airCloud Go to monitor consumption and detect deviations early (clogged filters, setpoint too low, short cycles).

• Periods of extreme cold : think about snow clearance and backup mode (baseboards/fireplace) for nights at –25°C and below .

10) Technical data sheet (RAM-G18N2HAA – 2 zones)

• Nominal capacity : 18,000 BTU (cool) / 22,000 BTU (heat) .

• Ranges : 7,000–20,500 BTU (cool) , 9,000–24,000 BTU (heat) depending on heads.

• SEER2 up to 23.0 ; EER2 up to 12.5 .

• HSPF2 (Region 4/5): 10.0/7.85 max depending on combination.

• External noise : 52 dB(A) . R-32 . 14 to 115 °F (cold) , –4 to 75 °F (heat) .

• Ext. dimensions : 33.5 × 29.5 × 11.7 in . Net weight : ~108 lbs .

• Connections (2 outlets): Liquid ¼" ×2 , Gas 3/8" ×2 .

• Lengths : total max. 165 ft , inter-unit 82 ft , total elevation 66 ft . Source: detailed table page 4.

11) AirGreen prices, subsidies and transparency

• Provincial grant (LogisVert) : $745 for the DoubleZone configuration (subject to program criteria at the time of purchase).

• Final quote written before work, no deposit : you pay at the end , when the system works exactly as agreed.

• Proof of performance : upon delivery, we leave you the vacuum gauge measurements , temperature/flow readings , AHRI registration ( 216097706 ).

12) Typical scenarios and observed results

Montreal – Côte-des-Neiges
Brick plex, living room 22 × 12 ft + bedroom 14 × 12 ft. Choice: 12 k + 9 k . In Smart-Eco mode, the bedroom automatically lowers when unoccupied; in heat waves, the living room maintains 23 °C with humidity 48–52% . Outside noise remains very discreet in the courtyard.

Laval – Sainte-Dorothée
Bungalow with basement home theater. Choice: 9k + 9k . In winter, the 21°C setting is maintained down to –20°C without additional heating; in occasional –25°C , baseboards 15–20% of the time. Preventative maintenance every 24 months thanks to FrostWash/Mold Guard .

Longueuil – Old Longueuil
Top floor condo with large windows. Choice of 7k bedroom + 12k living area . airCloud Go helps schedule shutdown upon owner departure (frequent travel). Estimated savings 18–25% vs. window air conditioner + baseboards.

Why choose AirGreen for your HITACHI DoubleZone?

• Regional expertise : hundreds of installations in Montreal, Laval, Longueuil, South Shore and North Shore .

• Installation engineering : load calculation, connection plan , condensate and noise management.

• After-sales service : Hitachi parts easily accessible via official distributor; extended warranty possible 10-10-10 .

• Respect for deadlines : frequent local stock, rapid commissioning .

• Air quality at the heart of the project: we configure FrostWash , Mold Guard , PM2.5/ViroSense S filters and airCloud Go for a healthy interior all year round ( pages 2–3 ).

NEXT STEP

Do you have a DoubleZone project in mind in Montreal, Laval, Longueuil, the North Shore, or the South Shore ? Contact AirGreen for a free on-site estimate and a clear final quote . We'll help you choose the ideal two heads , optimize your installation , and activate applicable subsidies .