SENVILLE R32 Top Discharge Central Heat Pump | 4 Tons - 48000 BTU

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• Federal Rebate:
• Provincial Rebate: $
• Energy Star®: Non
• WiFi: En Option
• AHRI: 218338225
• Efficiency: 18.5 SEER
• Warranty (Compressor - Parts - Labor): 10-10-0
• Additional Warranty (10-10-10): Possible
• Voltage: 220V
• Sound Pressure Level (Outdoor): 60.0 dB(A)
• Gas (Freon): R-32

A 4-ton central heat pump with vertical air discharge: a particularly interesting format when outdoor space and airflow become genuine concerns

The SENVILLE R32 Top Discharge 4-ton – 48,000 BTU central heat pump meets a very different need from that of a small wall-mounted heat pump. Here, we are talking about a central system capable of supplying a complete ductwork network, with indoor airflow of up to 1,690 CFM, an outdoor unit with vertical air discharge, an inverter compressor, and R-32 refrigerant.

Senville documentation identifies this system as the SENTC-48TD, a 4-ton central heat pump with a Top Discharge configuration.

At AirGreen Heat Pumps, Air Conditioning & Heating, we are particularly interested in this type of equipment for central system replacements in Montreal, Laval, Longueuil, the South Shore, and the North Shore, especially when a property already has a ductwork system and the available space around the outdoor unit creates certain constraints.

The combination provided for the AirGreen specification sheet includes:

• Outdoor unit: SENTC-48TD-OG
• Indoor unit: SENTC-48TD-IG
• Nominal capacity: 4 tons / 48,000 BTU
• AHRI: 218338225
• Refrigerant: R-32
• Wi-Fi: optional
• Power supply: 220 V
• Outdoor MCA: 36 A
• Outdoor MOP: 40 A
• Piping: 3/8 in – 3/4 in
• Maximum indoor airflow: 1,690 CFM
• Outdoor sound level: 60 dB(A)
• Indoor sound level: approximately 44 to 51 dB(A)
• ENERGY STAR®: no, according to the AirGreen specification sheet
• Cold Climate: no, according to the AirGreen specification sheet
• Stated minimum heating temperature: approximately -20 °C

An important technical clarification regarding efficiency ratings

The AirGreen specification sheet provided for this combination indicates, among other things:

• SEER: 18.5
• EER: 9.7
• HSPF: 8.1
• 27,000 BTU/h at -8 °C
• 29,000 BTU/h at -15 °C

However, the attached Senville brochure presents slightly different data for the SENTC-48TD system: SEER2 17.6, EER2 11.3, HSPF2 Region 4 of 9.1, and a heating COP of 3.39. It also indicates a nominal cooling capacity of 47,000 BTU/h, with modulation from 15,000 to 49,000 BTU/h.

This difference deserves to be mentioned rather than concealed. It may result from a particular certified combination, a documentation revision, or a change in the method used to present performance data. For an AirGreen submission, we recommend relying on the exact SENTC-48TD-OG + SENTC-48TD-IG combination and its AHRI certificate 218338225, then confirming the applicable values at the time of sale.

48,000 BTU does not mean that the compressor constantly operates at 48,000 BTU

Inverter technology completely changes how a 4-ton heat pump should be understood.

The brochure indicates a modulating cooling capacity of 15,000 to 49,000 BTU/h and a heating capacity of 11,000 to 52,000 BTU/h.

This means that when the home requires less heating or cooling, the system can reduce its output instead of operating solely according to an on-off logic.

In a properly sized home, this modulation can help:

• reduce temperature variations;
• extend periods of operation at partial load;
• limit certain short cycles;
• improve comfort stability;
• better match consumption to actual demand.

This is particularly important in a central installation, where comfort depends as much on production capacity as on air distribution.

Why the Top Discharge format can be useful in Montreal and denser areas

The outdoor unit is visually distinguished by its fan located on top.

Instead of discharging air horizontally toward a fence, driveway, or neighboring building, the heat pump expels a large portion of its airflow upward.

For certain projects in Montreal, Longueuil, or Laval, this configuration can make it easier to choose a location, especially when side passages are narrow.

The outdoor unit measures approximately:

29 9/64 in. × 29 9/64 in. × 32 7/8 in.

and weighs approximately 187 lb net.

This relatively compact footprint is appealing for a 4-ton heat pump, but it does not mean that we can install it in an enclosed space.

A Top Discharge unit always requires:

• adequate vertical clearance;
• sufficient airflow around the coil;
• a stable base;
• service clearance;
• a layout that takes snow accumulation into account;
• a location that complies with municipal requirements and property-line setbacks.

An indoor unit nearly 53 inches high

The indoor unit measures approximately:

24 31/64 in. wide × 21 1/32 in. deep × 52 63/64 in. high.

Its net weight is approximately 164 lb.

In a central system replacement, this data can become just as important as capacity.

We regularly encounter mechanical rooms where the old furnace was installed very close to the water heater, wall, or main plenum. A difference of a few inches may require:

• a sheet-metal transition;
• a plenum modification;
• filter repositioning;
• an adjustment to the air return;
• a drain modification;
• partial relocation of piping or wiring.

At AirGreen, we prefer to measure these elements during the assessment rather than treat them as an unexpected modification during installation.

1 690 CFM: a figure that makes it essential to take a close look at the duct network

The Senville brochure provides two indoor airflow values:

1 690 CFM at high speed and 750 CFM at low airflow.

A 4-ton system capable of moving 1,690 cubic feet of air per minute requires a properly sized duct network.

This is where many central systems can lose some of their potential.

A customer may replace an old heat pump with a much newer unit, but still have:

• an undersized air return;
• crushed ducts;
• highly restrictive transitions;
• closed registers;
• unbalanced distribution between floors.

The result can be disappointing even with new equipment.

A scenario we regularly see in Greater Montreal

A homeowner calls us because the second floor remains hot in the summer while the ground floor is comfortable.

The old system is 4 tons. The natural assumption is that even more capacity is needed.

In the field, however, the problem may be completely different: the second floor receives too little airflow, the main return is restrictive, or several branches are unbalanced.

In this case, moving to a higher capacity would not correct the cause.

For a SENVILLE SENTC-48TD, we therefore check not only the number of BTUs, but also how the 1 690 CFM can actually circulate through the building.

Outdoor unit with 3 050 CFM airflow and a sound level of 60 dB(A)

The brochure indicates a maximum outdoor airflow of 3 050 CFM and a sound level of 60 dB(A).

Indoors, the stated sound level ranges from 44 to 51 dB(A) depending on the airflow.

These values are encouraging for a unit of this capacity, but the actual acoustics of a central system depend on several other factors:

• unit installation;
• metal transitions;
• static pressure;
• return dimensions;
• speed at the grilles;
• mechanical room location;
• duct acoustic insulation.

A whooshing sound in a bedroom is therefore not necessarily caused by the compressor or the heat pump itself.

A Twin-Rotary DC Inverter compressor

The brochure identifies the compressor as a Twin-Rotary DC Inverter, model KTQ420D41SN5A1 from GMCC.

This design allows capacity modulation rather than operation solely at fixed power.

For the homeowner, the interest is not the compressor's name itself. What matters is the system's ability to respond to a variable load throughout the day.

A house may require a great deal of air conditioning at 4 p.m. on a hot day and significantly less at 10 p.m. The inverter allows it to better follow this variation.

Heating in Quebec, R-32, and installation: the points we verify before recommending this 4-ton SENVILLE

This is not a Cold Climate heat pump according to the AirGreen product sheet

The provided product sheet classifies the system as:

Cold Climate: no

and states:

Energy Star: no.

This is important information for a Quebec homeowner.

This does not mean that the unit does not heat in cold weather. The brochure indicates an official heating range down to -4 °F, or approximately -20 °C.

The difference lies mainly in the usage strategy.

We see this heat pump more as a solution for a property where:

• Central air conditioning represents an important need;
• The heat pump provides a large portion of the seasonal heating;
• A backup system remains available when the cold becomes severe;
• Cold Climate certification down to -30 °C is not a central requirement of the project.

The brochure's heating capacities provide a much more precise picture

Senville documentation provides several operating points:

• 50,000 BTU/h at 47 °F, or approximately 8 °C
• 30,000 BTU/h at 17 °F, or approximately -8 °C
• 36,000 BTU/h at 5 °F, or approximately -15 °C
• 32,000 BTU/h at -4 °F, or approximately -20 °C

The nominal heating range is between 11,000 and 52,000 BTU/h.

These figures differ slightly from the 27,000 BTU at -8 °C and 29,000 BTU at -15 °C currently provided on the AirGreen product sheet.

In a technical publication, this difference must be checked against the exact AHRI certificate rather than being arbitrarily combined.

What remains certain is that available capacity decreases in cold weather and must not be equated with the nominal capacity of 48,000 BTU.

Why this distinction matters in Laval, Montreal, and on both shores

A property may require 45,000 BTU/h of heating on an extremely cold day.

If the heat pump provides only 30,000 to 36,000 BTU/h under these conditions, the difference must be covered by another source.

In a central system, this may include a supplemental electric heating element.

The right strategy is not necessarily to require the heat pump to cover 100% of the load at every temperature. Instead, it is necessary to determine at what temperature supplemental heating becomes necessary and how much energy it must provide.

R-32: 119.9 oz factory charge

The SENTC-48TD operates with R-32.

The brochure states:

• factory charge: 3.4 kg / 119.9 oz
• additional charge: 0.52 oz per foot when required;
• liquid line: 3/8 in.
• gas line: 3/4 in.
• maximum piping length: 246 ft
• maximum height difference: 98.4 ft
• flared refrigerant connections.

This information is particularly useful for certain complex projects where the outdoor unit must be installed far from the indoor air handler.

Why an old 3/8 – 3/4 line set should not be reused automatically

The correct diameter alone does not guarantee that the lines can be reused.

For a replacement, we must consider:

• the refrigerant used by the old system;
• the cleanliness of the lines’ interiors;
• their condition;
• their thickness;
• the length;
• the number of connections;
• the height differences;
• the instructions applicable to the new equipment.

At AirGreen, this verification is particularly important when piping passes through multiple floors or finished areas.

208/230 V and outdoor circuit: MCA 36 A, MOP 40 A

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

It provides the electrical requirements separately:

• indoor unit: MCA 7 A / MOP 15 A
• outdoor unit: MCA 36 A / MOP 40 A.

This distinction is important when planning the site’s electrical installation.

The owner should not only check for the presence of a 40 A circuit breaker. The panel’s overall capacity, wiring, disconnect switch, and, when auxiliary heating is installed, its additional electrical load must also be considered.

Auxiliary heating must be included in the calculations from the outset

Since the heat pump is not identified as Cold Climate and its heating range drops to approximately -20 °C, planning for supplemental heating becomes particularly important in Quebec.

In an AirGreen installation, we want to know:

1. what the building’s actual heating load is;
2. how many BTUs the heat pump can provide at -8, -15, and -20 °C;
3. when supplemental heating becomes necessary;
4. what electrical capacity is available.

This analysis helps avoid two extremes: auxiliary heating that is too small to cover the home or an unnecessarily large element that imposes excessive electrical demand.

Sizing: 4 tons are not automatically better than 3 tons

A 48,000 BTU unit may be necessary in a large property, but the mere fact that a 4-ton system can be installed does not mean it should be.

Oversizing can cause:

• less favorable cycles;
• less consistent humidity control;
• excessive airflow;
• more noise at the grilles;
• less even temperatures.

We always prefer to validate the capacity before replacing “4 tons with 4 tons.”

A home that has received new windows, better insulation, and air-sealing work may have a much lower load than when its old system was installed.

Another mistake: judging only the outdoor unit

The heat pump photo naturally draws attention, but in a central system, the indoor unit and the ducts are equally important.

A SENTC-48TD with an improperly balanced duct network will not deliver the same results as a properly integrated system.

That is why our team considers:

• the return;
• the filter;
• the static pressure;
• the main ducts;
• the branches;
• the registers;
• the position of the indoor central unit;
• the drainage.

HVAC maintenance: high airflow requires a clean filter and coil

At 1,690 CFM, an airflow restriction can quickly become problematic.

A neglected filter increases system resistance. A dirty indoor coil can reduce heat exchange. Blocked ducts or closed registers can alter static pressure.

Regular HVAC maintenance therefore does more than simply keep the equipment clean: it helps maintain the airflow for which the central system was designed.

Warranty and pre-order verification

The AirGreen specification sheet indicates a manufacturer’s warranty:

10-year compressor – 10-year parts – 0-year labor

as well as possible additional coverage.

For any central heat pump, we recommend confirming the exact registration conditions and the coverage applicable to the installed combination.

It is also important to distinguish between:

• compressor warranty;
• parts warranty;
• labor;
• travel;
• refrigerant;
• diagnosis.

A “10-year” statement does not necessarily mean that all costs associated with a potential repair are covered during that period.

Which projects is this SENVILLE Top Discharge best suited for?

We would particularly consider it for:

• a home with an existing central ductwork network;
• a 4-ton system replacement after sizing has been validated;
• a property where outdoor ground space is limited;
• a location where vertical discharge offers an advantage;
• an installation where airflow of up to 1,690 CFM is required;
• a project seeking an R-32 central system;
• a property that already has suitable auxiliary heating;
• a project where Cold Climate certification is not essential.

It would be less logical if the primary goal is to maintain very high capacity at -25 °C or -30 °C. In that case, we would instead compare this system with a true Cold Climate central heat pump.

Why entrust this project to AirGreen

A 48,000 BTU central heat pump should never be treated as a simple equipment replacement.

At AirGreen, we assess the installation as a whole:

• heat load;
• heat pump capacity;
• ventilation network;
• static pressure;
• airflow;
• electrical power supply;
• auxiliary heating;
• refrigerant piping;
• drainage;
• thermostat;
• outdoor location;
• service access.

We serve Montreal, Laval, Longueuil, the South Shore, the North Shore, and Montérégie for central-system replacements and installations.

The SENVILLE SENTC-48TD R32 Top Discharge 4-ton offers an interesting technical package: a Twin-Rotary DC Inverter compressor, significant modulation, an indoor airflow range of 750 to 1,690 CFM, a compact top-discharge outdoor unit, an advertised outdoor sound level of 60 dB(A), and 3/8 in – 3/4 in piping. These specifications are directly confirmed by the Senville documentation provided.

Contact AirGreen for a quote on the SENVILLE R32 Top Discharge 4-ton central heat pump – 48,000 BTU. We can check the sizing, ductwork, electrical panel, auxiliary heating, and complete installation for your property in Montreal, Laval, Longueuil, the South Shore, or the North Shore.