"ADD ON" Central Heat Pump SAMSUNG Hylex Premium | 3 Tons - 36000 BTU

• BROCHURE : ENGLISH

(French brochure coming soon)

An "add-on" central heat pump designed to modernize an existing system without rebuilding everything

The Samsung Hylex Premium 3-ton central heat pump is for homeowners who want to improve their comfort, reduce their reliance on supplemental heating, and retain much of their existing HVAC infrastructure. In many homes in Montreal, Laval, Longueuil, on the North Shore and South Shore, the ducts, furnace, or indoor coil are already in place. The real challenge is therefore rarely about replacing everything, but rather integrating a modern, efficient, quiet, and well-configured solution.

This is precisely the purpose of an "ADD ON" system: adding a high-performance central heat pump to an existing installation, often with a furnace and A-coil. The Samsung Hylex Premium offers a more flexible approach than a conventional replacement, thanks to its compatibility with forced-air systems, its inverter compressor operation, its R-454B refrigerant, SmartThings connectivity, and its heating capacity down to -25 °C. Samsung documentation presents Hylex as a universal inverter heat pump that can replace a traditional air conditioning or heat pump outdoor unit, with compatibility adapted to air handling units and furnace + coil combinations.

What "ADD ON" means in a residential HVAC installation

In practical terms, an add-on central heat pump means that the outdoor unit is added to an already existing central system. In a ducted home, heated or cooled air is distributed through the existing network. When the ducts are in good condition and the furnace or indoor unit can be properly integrated, this approach can limit invasive work.

At AirGreen, we pay particular attention to three elements before recommending this type of installation:

1. The actual capacity of the duct network: a 3-ton heat pump will not perform well if the ducts are too restrictive or poorly balanced.
2. The compatibility of the indoor system: the HC48MBC021H1 indoor unit and the furnace + coil configuration must be validated according to Samsung's requirements.
3. The control logic: an add-on installation must correctly manage electric heating, auxiliary heating, defrosting, ventilation, and the transition between modes.

The Samsung Hylex Premium 3-ton is particularly interesting in homes where the client wants to keep an existing furnace as a backup source, while using the central heat pump for the majority of heating and cooling needs.

Essential technical data for the 3-ton model

This sheet concerns the following combination:

The Samsung submission sheet indicates a nominal capacity of 34,000 BTU/h for cooling and 35,000 BTU/h for heating, with a modulation range of 15,000 to 42,000 BTU/h for cooling and 11,000 to 55,000 BTU/h for heating. This nuance is important: the product is marketed as a 36,000 BTU heat pump, but its actual value varies depending on external conditions, internal demand, static pressure, installation configuration, and paired components.

Why the inverter compressor changes daily comfort

A traditional central heat pump often operates in more distinct cycles: it starts, heats or cools intensely, then stops. The Hylex Premium, on the other hand, uses a variable-speed inverter compressor, capable of adjusting its pace according to needs. In a well-insulated home in Boucherville or Saint-Lambert, for example, the heat pump can run longer at a reduced speed instead of constantly stopping and starting.

This modulation offers several concrete advantages:

• More stable temperature in main rooms.
• Better dehumidification in summer, especially on heavy days in Montreal and on the South Shore.
• Softer startups, which reduces current peaks compared to some conventional systems.
• Quieter operation, as the unit does not always need to run at full capacity.
• More consistent heating during long cold periods.

In our HVAC evaluations, we often see homes where the old central air conditioner quickly cooled the ground floor but left the upper floor uncomfortable or humid. A properly sized inverter heat pump alone won't solve a duct problem, but it provides much more flexibility to adjust comfort room by room when the installation is well-balanced.

Cold Weather Performance: A Key Point for Quebec

The Greater Montreal climate imposes a simple requirement: a central heat pump must not only cool well in July; it must also provide reliable heating in January. The Samsung Hylex Premium operates in heating mode down to -25 °C. The Samsung brochure also specifies that the 2 and 3-ton Premium models can maintain their nominal heating capacity at -20 °C, depending on conditions and applicable capacity tables.

For homeowners in Laval, Terrebonne, Blainville, Brossard, Longueuil or Montreal, this feature directly impacts auxiliary heating use. A well-configured system can allow the heat pump to operate as the primary source for much of the cold season, then activate the furnace or electric backup when external temperatures, internal comfort, or client settings warrant it.

This is where installation expertise becomes crucial. A central heat pump may have excellent technical data on paper, but an incorrect lockout temperature, a poorly configured thermostat, or inadequate airflow can reduce actual performance. At AirGreen, we do not treat these settings as a minor detail at the end of a project. They are an integral part of the installation.

A Solution Adapted to Dual Fuel Systems and Existing Furnaces

The Samsung Hylex Premium can be used in a dual fuel setup, meaning with a secondary heating source like a furnace. This approach appeals to many homeowners who don't want to immediately abandon their existing system but wish to reduce its usage.

In a home with a functional gas or electric furnace, adding an add-on central heat pump can allow for:

• using the heat pump for regular heating;
• keeping the furnace as backup during cold peaks;
• improving central air conditioning;
• reducing temperature fluctuations;
• modernizing the system without starting from a complete installation.

Samsung documentation indicates that the system can be paired with an air handling unit or a furnace + coil combination with TXV control, subject to application conditions.

Potential reuse of lines and wiring: a real advantage, but not automatic

One of the main advantages of the Hylex is its ability to facilitate certain replacements. Samsung indicates that many installations can reuse existing refrigerant lines, piping, wiring, or insulation, provided their condition and dimensions comply. The system only requires two low-voltage conductors between the indoor and outdoor sections, with standard 18 AWG control wire according to documentation.

For the AC036FCUPCG/AA model, the connections include a 3/8-inch liquid line and suction line options, with a standard of around 7/8-inch depending on the configuration. The maximum piping length is 164 ft, with up to 98 ft of vertical separation, which provides useful leeway in certain Montreal plexes, multi-story houses, or buildings with placement constraints.

This does not mean that all existing piping must be kept. Before doing so, we check in particular:

• the actual diameter of the lines;
• the condition of the copper;
• the cleanliness of the circuit;
• traces of old contamination;
• compatibility with the new refrigerant;
• the outdoor and indoor routing;
• the insulation of the suction line;
• the possibility of performing a compliant vacuum.

Reusing non-compliant components can be more expensive in the long run than a well-executed new installation.

R-454B Refrigerant and A2L Safety Requirements

The Samsung Hylex Premium uses R-454B, a next-generation refrigerant with a lower global warming potential than many refrigerants previously used in the HVAC sector. However, it is an A2L refrigerant, which implies appropriate installation precautions and safety components.

The submission sheet mentions that the HC48MBC021H1 coil integrates an R-454B leak detector. It also indicates that an A2L mitigation controller, reference HA00A00203H1, is required and sold separately. This type of detail should never be overlooked: it influences the compliance, safety, and proper functioning of the system.

At AirGreen, we always explain these requirements to the client before starting work. A modern HVAC installation isn't just about placing an outdoor unit and an indoor coil. It requires coordination between refrigerant, controls, electricity, ventilation, and safety devices.

The Role of the Samsung ACU MXD-U001XN Control Unit

The Hylex requires the MXD-U001XN control unit, installed between the outdoor unit, thermostat, and furnace or indoor unit. This component is mandatory in configurations with non-Samsung indoor units or furnaces. It enables communication between system elements and can offer finer control over indoor ventilation.

According to Samsung, the ACU also enables Wi-Fi connectivity via SmartThings, error notifications, viewing outdoor unit consumption data, and some advanced functions depending on the type of controller used. With a conventional 24 VAC thermostat, some functions are primarily focused on monitoring; with a Samsung communicating controller, more options become accessible, such as automatic optimization and certain advanced settings.

This is a point we clarify right from the quote. Many customers ask: "Can I keep my current thermostat?" The answer depends on the model, expectations, and desired functions. Keeping an existing thermostat may be possible, but it's important to understand the control limitations.

Sound Level and Compact Size: Highly Relevant in Urban Environments

In areas like Rosemont, Villeray, Ahuntsic, the Plateau, Verdun, Longueuil, or certain neighborhoods in Laval, the location of the outdoor unit is often limited. Yards are small, neighbors are close, and side margins don't leave much space.

The Hylex stands out with a slim outdoor design, with a depth of 13 inches for this model. The Samsung brochure also compares the compact footprint of the Hylex range to that of some traditional cubic units, highlighting a smaller footprint and simpler handling.

The sound level is also favorable: the 3-ton model's submission sheet indicates 55 dB(A) in cooling and 57 dB(A) in heating at high speed. In an urban installation, this sound level must nevertheless be analyzed with the actual location: neighboring wall, side passage, balcony, bedroom, fence, reflective surfaces, and municipal regulations.

LogisVert Grant: Understanding the $2592 Amount

The AirGreen product sheet indicates a LogisVert provincial grant of $2592, updated on November 26, 2025. This amount corresponds to clear logic: the sheet mentions a capacity at -8 °C of 21,600 BTU/h. For a cold climate heat pump, LogisVert assistance is calculated at $120 per 1000 BTU/h at -8 °C, when all program requirements are met. $21.6 x $120 = $2592. Hydro-Québec specifies that financial assistance varies depending on the installation date and program criteria; the official tool also allows checking eligibility using the model number or AHRI number.

For installations carried out as of November 26, 2025, Hydro-Québec indicates that heat pumps must be ENERGY STAR® certified to be eligible for the LogisVert program.

At AirGreen, we recommend validating financial assistance before installation, then retaining complete documentation: detailed invoice, model numbers, AHRI, ENERGY STAR proof, installation date, and contractor contact information. Hydro-Québec indicates that an application must be submitted within nine months of the installation date.

Common Mistakes to Avoid with a 3-ton Central Heat Pump

A 3-ton central heat pump should not be chosen simply because the old system had the same capacity. This is one of the most common mistakes in HVAC replacements. Homes change: improved insulation, replaced windows, finished basement, expansion, new occupancy habits. An old 3-ton unit may have been oversized or undersized from the start.

Here are the mistakes we aim to avoid during a Samsung Hylex Premium installation:

• Not checking static duct pressure: a good appliance does not compensate for a poorly designed air network.
• Ignoring coil compatibility: the indoor/outdoor combination must be validated.
• Incorrectly configuring backup thresholds: the furnace should not take over too early or too late.
• Forgetting the A2L mitigation controller: with R-454B, safety requirements must be met.
• Keeping a contaminated refrigerant line: improper reuse can compromise the compressor.
• Underestimating outdoor location: noise, clearance, snow, ice, and service access must be planned.
• Neglecting indoor coil drainage: a poorly installed drain can cause water damage.

Typical Installation Example in Greater Montreal

A frequent case we analyze involves a single-family home with existing ducts, built in the 1980s or 1990s, with a still functional furnace and an old central air conditioner at the end of its life. The owner wants to improve air conditioning, reduce heating costs in the shoulder season, and obtain a solution compatible with financial aid.

In this type of project, our work does not begin with equipment price. We first check the thermal load, duct condition, space around the furnace, coil access, electrical capacity, outdoor location, and thermostat compatibility. The Samsung Hylex Premium then becomes an interesting option when the air network can handle the required flow and the dual-fuel or add-on configuration is relevant.

In a South Shore home, for example, the compact unit can facilitate installation along a side wall. In a Montreal plex, the maximum line length can help when the unit needs to be placed in the backyard rather than in the front. In Laval, in a house with a central furnace and a well-sized electrical panel, the priority may be configuring controls to avoid excessive auxiliary heating use.

Why entrust AirGreen with the installation of this Samsung Hylex Premium

A central heat pump like the Samsung Hylex Premium 3-ton requires precise installation. The announced performance relies on proper pairing, exact refrigerant charge, good airflow, consistent control settings, and thorough commissioning.

At AirGreen, we support clients in Montreal, Laval, Longueuil, the North Shore, the South Shore, and Montérégie with a comprehensive approach:

• analysis of the existing HVAC system;
• capacity recommendation based on the building;
• validation of eligibility for applicable grants;
• installation by qualified refrigeration technicians;
• Samsung control configuration;
• verification of airflow and heating/cooling operation;
• clear explanation of settings to the client;
• after-installation service for HVAC maintenance and service calls.

We provide a final offer before work to avoid unpleasant surprises. We also consider local realities: difficult access in Montreal alleys, restricted clearances on the South Shore, multi-zone houses on the North Shore, condominiums, duplexes, triplexes, and multi-unit buildings.

Recommended Maintenance After Installation

To keep a Samsung Hylex Premium central heat pump in good condition, we recommend regular maintenance:

• filter replacement or cleaning as needed;
• indoor coil inspection;
• outdoor unit cleaning;
• condensate drain check;
• monitoring operating pressures and temperatures;
• electrical connection inspection;
• validation of heating, defrost, and backup sequences;
• SmartThings parameter update or verification when relevant.

Well-planned HVAC maintenance helps preserve efficiency, limit interruptions, and extend system life. It also allows for quick detection of airflow, drainage, or control issues before they become costly.

Who This Product is Best Suited For

The Samsung Hylex Premium 3-ton add-on is particularly suitable for homeowners who have:

• a house with existing ducts;
• a compatible furnace or central system;
• an old central air conditioner to replace;
• a need for efficient heating down to low temperatures;
• a preference for a compact outdoor unit;
• an interest in Wi-Fi connectivity;
• a project eligible for LogisVert financial assistance;
• a goal of stable comfort in both summer and winter.

It is less suitable for buildings where ducts are too small, damaged, or poorly distributed, unless corrections are planned. In some cases, a different capacity, a wall-mounted heat pump, a multi-zone system, or a partial overhaul of the air network may be more appropriate. Our role is to recommend the right system, not just the most impressive model on paper.

Request an AirGreen Assessment

The Samsung Hylex Premium 3-ton – 36,000 BTU "ADD ON" central heat pump is a serious solution for modernizing an existing central system, improving comfort, and reducing auxiliary heating use when the installation is well-designed. To get a clear quote, validate your system's compatibility, check LogisVert assistance, and plan a professional HVAC installation in Montreal, Laval, Longueuil, on the North Shore, or the South Shore, contact AirGreen now.