FORESTAIR MZ R454B 3-Zone Wall-Mounted Heat Pump | Ext: 36000 BTU
SEER2 (Seasonal Air Conditioning Efficiency)
HSPF2 (Seasonal heating efficiency)
EER2 (Instantaneous efficiency in air conditioning)
COP at -8 °C (Heating energy efficiency)
CFM (Airflow) (12,000 BTU***)
A high-performance multi-zone HVAC solution adapted to Quebec's climate
In the demanding climatic context of Montreal, Laval, Longueuil, the North Shore, and the South Shore, the choice of a multi-zone HVAC system must meet precise criteria: real energy efficiency, heating performance at very low temperatures, installation flexibility, and long-term reliability. At AirGreen, we regularly install systems like the FORESTAIR MZ R454B 36,000 BTU 3-zone wall-mounted heat pump, precisely because it meets these on-the-ground requirements.
This model is particularly aimed at owners of houses, plexes, condos, or multi-unit dwellings who wish to air condition and heat several spaces independently, while maintaining a single outdoor unit.
Why the FORESTAIR MZ 36,000 BTU is a strategic choice
Flexible multi-zone configuration (up to 4 zones)
This heat pump allows connecting up to 4 indoor units, offering great layout freedom. In practice, this means:
- A bedroom with independent control
- A living room with higher capacity
- An office or basement with personalized management
In several projects completed in Boucherville and Laval, we used this flexibility to replace inefficient electric systems with a single centralized solution, while maintaining room-by-room comfort.
Real performance in Quebec winters
One of the most important criteria remains heating performance. This model offers:
- Heating capacity down to -25°C
- 27,400 BTU at -8°C
- 26,000 BTU at -15°C
These data are not theoretical. They correspond to realistic conditions for Montreal and Montérégie. According to the technical sheet, the heating operation range goes down to -25°C, confirming its compatibility with local winters.
At AirGreen, we installed this system in a triplex in Longueuil, where the client sought to completely eliminate electric baseboards. Result: significant reduction in energy bills from the first winter.
Certified energy efficiency and available subsidies
This heat pump is:
- ENERGY STAR® certified
- Cold Climate ENERGY STAR®
- SEER2: 22.5
- HSPF2: 10.0
- COP at -8°C: 3.5
These performances allow access to significant subsidies, notably:
- LogisVert Program: up to $3,288
In several installations on the North Shore, our clients have recovered a significant portion of their investment through these programs.
New R-454B refrigerant: more ecological
The transition to R-454B represents a significant evolution in the HVAC industry:
- Significant reduction in global warming potential (GWP)
- Improved thermodynamic efficiency
- Compliance with future environmental standards
At AirGreen, we are already prioritizing these systems to anticipate upcoming regulations in Quebec.
Essential technical data to know
Capacities and performance
- Nominal power: 36,000 BTU
- Actual cooling capacity: 35,000 BTU
- Heating capacity: 36,000 BTU
- Outdoor airflow: 3200 m³/h
- Outdoor sound level: 65 dB(A)
Installation and electrical requirements
- Voltage: 208-230V / 1 phase / 60 Hz
- MCA: 22A
- Recommended breaker: 35A
These elements are crucial for a compliant installation. In several projects in Montreal, we had to adapt the electrical panels to meet these requirements.
Piping and maximum distances
- Liquid line: 1/4"
- Gas line: 3/8"
- Maximum total length: 80 m (263 ft)
- Maximum length per zone: 30 m (98 ft)
- Maximum vertical difference: 10 m (33 ft)
These characteristics make the system particularly suitable for:
- Multi-story houses
- Duplexes and triplexes
- Properties with finished basements
AirGreen experience feedback: actual installation in Laval
We recently installed this model in a single-family home in Laval (Chomedey) with the following constraints:
- Three distinct zones (living room, master bedroom, basement)
- Long distance between outdoor unit and basement
- Client wishing to minimize noise
Challenges encountered
- Piping run over a long distance
- Drainage optimization
- Choice of suitable indoor units (9K, 12K, and 18K)
Result
- Perfectly balanced installation
- Very low indoor sound level (≈ 30 dB in low mode)
- Stable heating even during intense cold periods
Common mistakes to avoid with a multi-zone system
1. Improper BTU distribution
Many clients think it's enough to divide the 36,000 BTUs equally. In reality:
- Each room has different needs
- Orientation, insulation, and volume influence capacity
At AirGreen, we always perform a complete thermal analysis.
2. Underestimating piping length
Incorrect calculation can:
- Reduce efficiency
- Increase installation costs
- Affect overall performance
3. Neglecting HVAC maintenance
Even with a high-performance system:
- Mandatory filter cleaning
- Recommended annual inspection
- Refrigerant check
This is particularly important in cities like Montreal and Longueuil, where climatic variations are significant.
Why choose AirGreen for this installation
Recognized local expertise
- Concrete experience in HVAC installation in Montreal, Laval, South Shore, and North Shore
- Mastery of complex multi-zone systems
- Adaptation to Quebec's climatic realities
Transparency and precision
- Detailed quotes
- No hidden costs
- Realistic technical advice
Optimized installation
- Precise sizing
- Customized configuration
- Complete commissioning
Reliable after-sales service
- Quick support
- Qualified technicians
- Structured customer follow-up
Conclusion: a heat pump adapted to demanding multi-zone projects
The FORESTAIR MZ R454B 36,000 BTU 3-zone wall-mounted heat pump represents a solid solution for properties requiring independent management of multiple spaces.
It combines:
- Heating performance down to -25°C
- High energy efficiency
- Multi-zone flexibility
- Modern technology with R-454B
At AirGreen, we recommend this model for residential and multi-unit projects requiring a reliable, adaptable, and high-performing system in Quebec's climatic conditions.
Contact AirGreen for your HVAC project
Looking to install a multi-zone heat pump in Montreal, Laval, Longueuil, on the North Shore, or the South Shore?
Our team supports you every step of the way:
- Personalized assessment
- Choice of suitable system
- Professional installation
- Access to available subsidies
Contact us today for a detailed quote and optimize your comfort all year round.