A hybrid approach to maximize thermal comfort and energy efficiency
In the harsh climate of Greater Montréal, the combination of a multizone heat pump and a traditional furnace is a highly strategic solution to ensure stable, efficient, and high-performance heating all year long. At AirGreen, we’ve guided countless clients – residential homeowners, building managers, general contractors – across Montréal, Laval, Longueuil, the North Shore and the South Shore, in setting up this particularly advantageous hybrid HVAC system. This article walks you through the real-life benefits of this setup, the technical elements to know, mistakes to avoid, and our unique approach to each installation.
Why combine a multizone heat pump with a furnace?
Integrating a multizone heat pump with an existing central heating system like a gas or electric furnace allows you to harness the strengths of each technology, depending on the season and the specific needs of each area of the home:
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The multizone heat pump heats efficiently down to -20 °C and also offers air conditioning for summer months.
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The furnace kicks in during extreme cold snaps, when heat pumps are less efficient.
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The result: a significant reduction in energy consumption, uniform comfort in every room, and a system that lasts longer because each component runs at partial load.
Real-world case: multizone Fujitsu heat pump installation combined with an electric furnace in Montréal
In a duplex located in the Rosemont–La Petite-Patrie borough, our technicians recently installed a FUJITSU Airstage KXAH R-32 multizone heat pump (18,000 + 9,000 BTU) to serve two distinct zones – living room and bedrooms – alongside an existing central electric furnace. The client wanted to reduce Hydro-Québec bills without completely replacing the central system.
Project steps:
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Evaluation of the building layout: identifying areas with high heating loads.
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Hybrid technical proposal: adding wall-mounted units connected to an outdoor Fujitsu unit, tied to a smart controller able to synchronize with the furnace.
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Work completed in two days, with no heating interruption, coordinated seamlessly between HVAC technicians and electricians.
Measured benefits after 6 months of use
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Reduction of almost 30% in electricity consumption during winter months thanks to the heat pump being prioritized.
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Better thermal comfort in the bedrooms (which were often underheated by the central system).
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Less noise and improved air quality thanks to Fujitsu's advanced filters.
Which multizone heat pump should you choose?
Choosing the right brand and model depends on several factors: home insulation, room layout, number of zones to cool/heat, and client preferences. At AirGreen, we frequently recommend the following systems:
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Fujitsu KXAH R-32: excellent performance down to -26 °C, quiet, eligible for multiple rebates.
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Gree Multi+ Extreme: ideal for large residences, proven reliability.
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Daikin MXS Series: smart integration with central systems, Energy Star certified performance.
All these models can be configured to work in dual-fuel mode with a furnace, whether through smart thermostats or control relays.
Available grants and financial incentives
Another major reason to opt for a hybrid system: the generous grants offered through Hydro-Québec’s LogisVert program, as well as provincial and municipal incentives. In most projects, our clients benefit from:
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A rebate between $1,600 and $5,000 depending on the number of zones and type of installation.
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Streamlined eligibility thanks to our complete administrative support.
At AirGreen, we handle and submit all rebate paperwork for our clients, ensuring fast and full reimbursement.
Common mistakes to avoid when integrating systems
We often come across poorly designed hybrid setups done by inexperienced contractors. Here are the most common errors:
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Oversized BTU output: installing wall units that are too powerful for small rooms, leading to short cycling and premature wear.
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Lack of coordination between systems: both systems running at the same time, causing unnecessary overconsumption.
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Poor thermostat choice or missing automatic switch-over relays.
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Neglecting the assessment of existing ducts, which can impact overall comfort.
How AirGreen stands out
Our multidisciplinary team (HVAC specialists, electricians, project managers) takes a personalized approach with every client:
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Comprehensive thermal study of the residence or building.
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Clear, itemized recommendations, based on return on investment.
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Post-installation follow-up to validate real-world system performance.
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Over 300 successful hybrid installations completed across Montréal, Laval, Longueuil, the North Shore and the South Shore.
Who is this hybrid system ideal for?
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Single-family homeowners looking to optimize zone-based comfort.
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Duplex or triplex owners seeking a cost-effective solution without major renovations.
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Commercial or semi-commercial buildings, mixing open space and closed rooms.
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Anyone with a working furnace looking to improve their energy efficiency.
Our tips for a successful hybrid project
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Choose a certified installer with specific experience in this type of integration.
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Don’t underestimate the complexity of balancing thermal loads between the heat pump and furnace.
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Have your existing ductwork checked – sometimes, simple cleaning or insulation can dramatically boost overall efficiency.
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Prioritize a heat pump eligible for rebates, Energy Star certified.
Conclusion
Combining a multizone heat pump with an existing furnace is a smart strategy to enjoy the best of both worlds: energy efficiency, customized comfort, substantial savings, and added property value. At AirGreen, we support you at every step of the project, from design to final optimization, with a sharp eye for detail and client satisfaction.
For a free assessment or technical review, don’t hesitate to contact our team. Whether you’re located in Montréal, Laval, Longueuil, on the North Shore or the South Shore, we have a personalized solution ready for you.