SENVILLE R32 Top Discharge Central Heat Pump | 2 Tons - 24000 BTU

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• Federal Rebate:
• Provincial Rebate: $
• Energy Star®: Non
• WiFi: En Option
• AHRI: 218338223
• Efficiency: 19.7 SEER
• Warranty (Compressor - Parts - Labor): 10-10-0
• Additional Warranty (10-10-10): Possible
• Voltage: 220V
• Sound Pressure Level (Outdoor): 58.0 dB(A)
• Gas (Freon): R-32

A compact 2-ton central system that must be evaluated based on its actual performance, airflow, and winter behavior

The 2-ton SENVILLE R32 Top Discharge central heat pump, combination SENTC-24TD-OG / SENTC-24TD-IG, is primarily intended for homeowners who want to replace or modernize a central system while retaining ducted distribution. With a rated capacity of 24,000 BTU/h, an inverter compressor, indoor airflow of up to 830 CFM, and announced heating operation down to -20°C, it offers an interesting configuration for certain homes, condominiums, and small buildings in Montreal, Laval, Longueuil, the North Shore, and the South Shore.

At AirGreen, however, we never evaluate a central heat pump solely based on the number of tons listed on its technical sheet. With a central system, the quality of the results depends just as much on its actual low-temperature capacity, the ductwork, available airflow, static pressure, return air, outdoor unit location, and electrical sizing.

The Senville documentation presents this system as a solution for small to medium-sized homes, with an indicative coverage area of up to approximately 1,200 sq. ft.. It also confirms inverter technology and a rated cooling capacity of 24,000 BTU/h.

The exact combination we are analyzing

For this AirGreen product page, the key references are as follows:

One detail about the efficiency ratings deserves clarification. The AirGreen product page states SEER 19.7, EER 12.5, and HSPF 8.5, while the Senville technical brochure provided for this series lists SEER2 20.0, EER2 13.3, and HSPF2 Region 4 of 9.4.

We avoid arbitrarily combining these figures. The SEER and SEER2 designations, or HSPF and HSPF2, correspond to different evaluation methods. For a technical comparison, a quotation, or an eligibility check for a program, we always recommend working with the exact combination of units and the corresponding AHRI reference.

24,000 BTU does not mean constant operation at 24,000 BTU

The main advantage of an inverter system is its ability to modulate.

The brochure indicates a cooling range of approximately 6,800 to 25,000 BTU/h. In heating mode, the published range is 9,000 to 28,000 BTU/h.

This modulation is particularly relevant during the shoulder-season days of September, October, April, or May in Montreal and Greater Montreal. A properly sized heat pump can reduce its output instead of operating only in full-capacity on-off cycles.

In a home where the heating load is relatively low for much of the season, this can promote more stable operation that is better suited to the actual demand.

In cooling mode, the published rated electrical power is 1,805 W, with an approximate range of 750 to 2,700 W. In heating mode, the rated electrical input is listed as 2,150 W, with modulation of approximately 660 to 2,600 W.

These values clearly illustrate why we prefer to analyze an inverter system as a modulating unit rather than as a simple “2-ton” machine.

At -15 °C, heating capacity remains an essential figure

For a heat pump intended for Quebec, the rated capacity at mild temperatures is less informative than its capacity when temperatures drop.

The technical documentation indicates, among other things:

The brochure also indicates a heating operating range down to -4 °F, or approximately -20 °C.

For its part, the AirGreen specification sheet lists 21,000 BTU at -15 °C and approximately 17,000 BTU at -8 °C.

These values should not be read as though they all came from the same test point. Certification conditions, operating speed, and measurement points may differ. That is precisely why, at AirGreen, we look at the performance curve and documentation for the exact combination rather than a single isolated number.

Operation at -20 °C does not mean “cold-climate” certification

This is one of the most important distinctions of this SENVILLE.

The heat pump can operate in heating mode down to approximately -20 °C, but the AirGreen specification sheet identifies it as:

Cold Climate: no
ENERGY STAR: no

Its winter operating range must therefore not be interpreted as ENERGY STAR cold-climate certification.

For a homeowner in Laval, Boucherville, Longueuil, Terrebonne, Blainville, or Montreal who selects a system based on a subsidy, this difference is important. A heat pump that still produces heat at low temperatures is not automatically eligible for the same programs as a combination officially recognized as ENERGY STAR cold climate.

We therefore recommend checking whether a specific model qualifies before signing a contract, rather than including an assumed subsidy in the project budget.

830 CFM: very important information for the ductwork

The SENVILLE indoor unit provides 830 CFM at high speed and 420 CFM at low speed. The airflow and sound-level table appears clearly on page 4 of the technical documentation.

For a 2-ton central unit, 830 CFM corresponds to approximately 415 CFM per ton.

This value falls within a very common range for a residential central system and mainly shows why the ductwork must be checked before replacing an old unit.

We regularly encounter homes where the equipment can theoretically move 800 CFM or more, but where the existing network creates too much restriction: undersized return air, an overly restrictive filter, crushed ducts, a closed damper, or a poorly designed transition.

Under these conditions, installing a new heat pump without examining the ductwork can lead to air noise, insufficient airflow in certain rooms, and operation that does not reflect the performance indicated in the documentation.

The 1,200 sq. ft. area is only an indication

Senville presents this system as being suitable for a house, condo, or apartment of up to approximately 1,200 sq. ft.

At AirGreen, we never turn this marketing indication into a sizing rule.

Two 1,200 sq. ft. properties can have radically different heating loads.

A well-insulated bungalow on the South Shore, built recently and equipped with high-performance windows, may require much less heating than a duplex of comparable size in Montréal with older walls, numerous windows, and significant air infiltration.

A central heat pump must be selected according to several factors:

• building heat losses, insulation quality, and airtightness;
• window area and orientation;
• duct configuration and return-air dimensions;
• served floor and ceiling height;
• summer cooling load;
• auxiliary heating capacity;
• available electrical capacity;
• applicable outdoor design temperature for the area.

This is the only list you really need to keep in mind before automatically converting square footage into tons of air conditioning.

Why oversizing remains a mistake even with an inverter

This SENVILLE’s compressor is a Twin-Rotary DC Inverter, model KTM240D57UMT from GMCC.

The inverter provides more flexibility than a traditional single-speed compressor, but it does not make sizing unimportant.

A system that is too large for the actual load can still have periods when it quickly reaches the requested temperature. In summer, this can reduce the time available for dehumidification. Conversely, a system undersized relative to the heat losses may require significant auxiliary heating during cold periods.

We therefore seek the best balance among capacity, modulation, comfort, and use of backup heating.

Top Discharge: why the outdoor unit’s design changes the installation

The term Top Discharge means that the outdoor fan primarily discharges air upward.

This format is familiar in the world of North American central systems and makes it possible to have a relatively compact outdoor unit at ground level.

The outdoor unit measures approximately 29.14 × 29.14 × 25 in and weighs approximately 143 lb net. Its maximum published outdoor airflow is 2,800 CFM.

An airflow of 2,800 CFM must not be blocked by a structure placed too close above the unit.

During our installations in Montréal, Laval, Longueuil, the North Shore, and the South Shore, we must therefore consider an element that product photos do not always show: the actual airflow around the condenser.

A unit wedged between three walls, beneath a very low balcony, or in a location where snow accumulates heavily does not benefit from the same conditions as a properly clear installation.

An outdoor unit rated at 58 dB(A)

The published outdoor sound level is 58 dB(A). The indoor unit is rated at approximately 38 dB(A) at low speed and 42 dB(A) at high speed.

For a central system, however, the noise perceived in the home depends on much more than the equipment’s sound level.

Duct sizing, air speed, the return grille, the proximity of the furnace or fan coil to occupied rooms, and vibrations transmitted to the structure can considerably alter the actual experience.

Quiet equipment connected to an undersized return-air duct can become noisy at the register. That is why we consider the distribution network as part of the system, rather than as a secondary element.

A tall, narrow indoor unit

The indoor unit measures approximately 21.03 in × 21.03 in × 49.22 in and weighs 125 lb net.

This format can facilitate certain replacements in a relatively narrow mechanical room, but the available space must be measured precisely.

In the basements of homes in Montreal or Longueuil, we often have to work around low plumbing, limited ceiling height, a nearby water heater, or ductwork built around the old unit.

A few inches can make the difference between a clean installation and an unnecessarily complex duct transition.

What we check at AirGreen before installing this SENVILLE R-32 central system

The ductwork comes before the final equipment selection

When replacing a central system, a common mistake is to take the capacity of the old unit and automatically order the same capacity.

We prefer to check whether that previous capacity was actually suitable for the building.

A representative scenario we frequently encounter is a house that has been equipped with a 2.5- or 3-ton air conditioner for fifteen or twenty years. The homeowner then assumes that a new heat pump must necessarily have the same capacity.

After inspection, it sometimes turns out that the ducts were not designed to move the airflow corresponding to that capacity properly. In that case, repeating the same sizing may simply reproduce the existing problems.

With the SENVILLE 2-ton unit and its 830 CFM, we therefore check the power supply, returns, and distribution before confirming that this capacity is suitable.

The electrical data are relatively precise

The brochure specifies a 208/230 V, 60 Hz, single-phase power supply.

For the outdoor unit:

MCA: 19 A
MOP: 20 A

For the indoor unit:

MCA: 5 A
MOP: 15 A

These data are published in the electrical table in the Senville documentation.

The final circuit must naturally be established according to the actual installation and applicable electrical requirements. For a central replacement, we also check the auxiliary heating, since it can represent a much greater electrical load than the heat pump itself.

Auxiliary heating must not be overlooked

Since this combination is advertised for operation down to approximately -20 °C, the heating strategy for temperatures below this limit must be planned.

Even before reaching -20 °C, the home's actual heating needs may also exceed the heat pump's available instantaneous capacity.

In a Quebec central installation, the role of the electric element or another backup heating system must therefore be incorporated into the sizing and controls.

The goal is not necessarily to prevent auxiliary heating from operating completely. The goal is to avoid calling on it unnecessarily when the heat pump can still efficiently provide most of the required heat.

R-32 and 3/8 in. – 3/4 in. piping

SENVILLE uses R-32 and a refrigerant line measuring 3/8 in. for liquid and 3/4 in. for gas.

The brochure also specifies:

maximum piping length: 164 ft / 50 m
maximum height difference: 82 ft / 25 m
factory refrigerant charge: 2.9 kg / 102.3 oz
published additional charge: 0.52 oz per foot / 48 g per metre

These figures are particularly useful in installations where the mechanical unit is located in the basement and the outdoor unit must be positioned far from the mechanical room.

However, an authorized maximum length does not mean that every 150 ft installation is automatically desirable. The more complex the route, the more important planning the piping, oil, charge, and commissioning becomes.

Vacuuming and refrigerant charge remain critical

An inverter system can adjust its capacity, but it cannot correct poor refrigeration installation.

At AirGreen, installing a central heat pump requires, among other things, rigorous attention to connections, leak-tightness, evacuation, and the proper refrigerant charge.

An incorrect charge can affect capacity, efficiency, pressures, and compressor reliability.

With R-32, it is also necessary to use procedures and tools compatible with the refrigerant installed and comply with the requirements applicable to the product.

The indoor unit’s drainage deserves as much attention as the refrigerant

In air conditioning, a central coil can remove a significant amount of moisture from the air.

The condensate pan, drain, and slope of the line must therefore be properly arranged. In a basement installation, a drainage problem may remain unnoticed until water reaches the floor or nearby materials.

We verify this element during the planning stage rather than after commissioning.

A heat pump best suited to projects where the ductwork already exists

This SENVILLE 24,000 BTU central system is particularly well suited to a home that already has a functional central distribution system.

It can then serve as the basis for replacing an old central air conditioner or an old heat pump, provided that:

the ductwork is suitable, the return air can provide the required airflow, the electrical supply is sufficient, and the building load genuinely corresponds to a 2-ton central system.

For a home with no ductwork at all, the project becomes very different. It is then necessary to compare the cost and impact of installing a complete duct network with other HVAC solutions, such as a wall-mounted heat pump, a multi-zone system, or a ducted system designed specifically for the property.

The mistakes we seek to avoid

For this type of project, the choice of brand is only one part of the decision. A properly installed SENVILLE can deliver a very different result from the same model installed without checking the ductwork, load, or outdoor clearances.

We therefore pay particular attention to compatibility between the heat pump, the house, and the existing distribution system.

That is also why we prefer explaining to a homeowner that a 2-ton system is not appropriate for their building rather than simply installing the requested capacity without analysis.

10-10-0 warranty and additional coverage

The warranty indicated by AirGreen is:

10 years on the compressor
10 years on parts
0 years of manufacturer labor coverage

An additional warranty may be available according to the terms applicable to the project.

This distinction is important. A part covered by the manufacturer does not automatically mean that the costs of travel, diagnosis, and replacing that part are included for ten years.

We clarify these elements before installation so the homeowner knows exactly what is covered.

Our technical opinion on this SENVILLE Top Discharge 2-ton system

The SENVILLE SENTC-24TD has several features of interest for a central replacement: inverter modulation, a compact outdoor format, 830 CFM, heating operation down to approximately -20 °C, piping that allows relatively long runs, and a published outdoor sound level of 58 dB(A).

Its profile must nevertheless be properly understood.

This is not a heat pump identified as Cold Climate, and it is not listed as ENERGY STAR in the provided specifications. It should therefore not be chosen solely because it can operate at -20 °C.

For a homeowner in Greater Montreal, the real question is whether this 24,000 BTU combination matches the building’s heat loss, ductwork, and auxiliary heating strategy.

This analysis determines whether the system will actually be suitable for the home.

SENVILLE central heat pump installation in Montreal, Laval, Longueuil, the North Shore, and the South Shore

At AirGreen Heat Pumps, Air Conditioning & Heating, we can inspect the existing configuration, ductwork dimensions, mechanical space, return air, electrical capacity, and outdoor unit location on-site before confirming the selection.

For a SENVILLE R32 Top Discharge 2-ton central heat pump, this step helps prevent the most costly post-installation problems: improper airflow, an incorrectly sized system, an improperly positioned outdoor unit, or poorly integrated auxiliary heating.

Contact AirGreen for a quote, to confirm whether the 24,000 BTU SENVILLE SENTC-24TD is suitable for your property, and to schedule professional installation in Montreal, Laval, Longueuil, the North Shore, or the South Shore.