SENVILLE R454B Central Heat Pump | 5 Tons - 60000 BTU

A high-capacity SENVILLE central system that combines Inverter modulation, heating down to -30 °C, and whole-home air distribution

The SENVILLE R454B Central Heat Pump | 5 Tons - 60000 BTU is intended for projects where a simple wall-mounted unit no longer meets the desired objective. Here, we are talking about a central system designed to work with a duct network, move up to approximately 1,807 CFM indoors, and provide heating and cooling to multiple rooms from a single system.

At AirGreen, we are particularly interested in this type of equipment for large homes in Montreal, Laval, Longueuil, the South Shore, the North Shore, and Montérégie, as well as for certain commercial projects. A central heat pump in this category can replace an old central air conditioner, an aging heat pump, or be part of a complete upgrade that includes a new air handler.

The exact combination is:

SENVILLE SENDC-60HF-OG outdoors and SENDC-60HF-IG indoors, certified under AHRI number 215735330.

One technical detail needs to be clarified immediately. The system is commercially classified as 60,000 BTU / 5 tons, but the AHRI-certified combination is rated at 54,000 BTU/h of rated cooling capacity and 56,000 BTU/h of heating capacity. The AHRI certificate also confirms 16.0 SEER2 and 10.0 EER2.

The Senville brochure lists these values and indicates a cooling range of 11,400 to 56,300 BTU/h, as well as a particularly broad heating range of 8,100 to 64,500 BTU/h.

This difference between the “60,000 BTU” designation and the certified rated capacity of 54,000 BTU is not unusual. In the HVAC field, a tonnage class does not always correspond exactly to the certified capacity of the indoor-outdoor combination. To compare two systems properly, we therefore use the AHRI number and certified capacities, not just the commercial name.

A technical overview that immediately shows what type of system we are dealing with

The main features of this SENVILLE central system are:

• Capacity class: 5 tons / 60,000 BTU
• Certified rated cooling capacity: 54,000 BTU/h
• Cooling range: 11,400 to 56,300 BTU/h
• Rated heating capacity: 56,000 BTU/h
• Heating range: 8,100 to 64,500 BTU/h
• Heating capacity at -8 °C: 45,000 BTU/h
• Heating capacity at -15 °C: 52,000 BTU/h
• Maximum capacity indicated at -30 °C: 30,900 BTU/h
• COP at -8 °C: approximately 2.4
• COP at -15 °C: approximately 1.8
• COP at -30 °C: approximately 1.46
• SEER2: 16.0
• EER2: 10.0
• HSPF2: 9.0
• Refrigerant: R454B
• Minimum heating temperature: -30 °C
• Maximum indoor airflow: 1,807 CFM
• Power supply: 208/230 V, single-phase
• MCA: 40 A
• MOP: 40 A
• Piping: 3/8 in – 3/4 in
• Outdoor unit: SENDC-60HF-OG
• Indoor unit: SENDC-60HF-IG
• AHRI: 215735330
• Wi-Fi: available as an option

The brochure also confirms a nominal COP of 3.1, an HSPF2 of 9.0 for Region IV, and a maximum electrical protection of 40 A.

The most important point: an Inverter compressor that does not operate like an old central heat pump

An older conventional central system often operates according to a much simpler logic: start at full capacity, run, stop, then restart when the temperature again moves away from the setpoint.

The SENVILLE SENDC-60HF instead uses variable-speed technology. The compressor can adjust its output to the building's actual load.

In heating mode, the published range is approximately 8,100 to 64,500 BTU/h.

This significantly changes the system's behavior during the shoulder seasons.

A home that requires 50,000 BTU/h during a very cold January night may need only 15,000 or 20,000 BTU/h during an October day. A variable-capacity heat pump can reduce its output instead of multiplying short cycles.

In a properly designed central installation, this can promote:

more consistent temperatures between cycles, quieter operation at partial load, longer cycle times, fewer abrupt starts, and energy consumption better suited to actual demand.

However, modulation does not correct poor ductwork design. A quality central heat pump installed on undersized ducts remains a system limited by its ductwork.

1,807 CFM: why the ductwork becomes an integral part of the heat pump

The air handler can reach approximately 1,807 CFM at maximum speed. The other published values are approximately 1,583, 1,360, and 1,136 CFM, depending on the ventilation setting.

In the field, this factor matters enormously.

When we replace an old central system in a residence in Montréal, Laval, or Longueuil, we do not look only at whether the new unit physically fits where the old one was.

We also check whether:

the return-air openings are large enough, the main duct can carry the required airflow, the branches properly supply the more distant rooms, the registers do not create too much restriction, and the static pressure remains compatible with the air handler.

A 5-ton capacity requires a significant volume of air.

Installing a large heat pump on a network that was originally designed for a much smaller unit can cause insufficient airflow, noise at the registers, poor heat exchange, or uneven distribution between floors.

This is one of the reasons why, at AirGreen, we never consider replacing a central system to be a simple “box-for-box” exchange.

An AirGreen example in Westmount: when existing ductwork determines much of the work

During an installation of a Midea EVOX G3 central heat pump in Westmount, our team was working in an older house with a cramped mechanical room and an existing duct network that had evolved through years of renovations.

The work involved more than simply connecting an indoor unit. We had to account for the plenum, the tightness of the connections, the refrigerant lines, condensate drainage, and accessibility for future servicing. On this type of project, a high-performance central system can genuinely improve temperature stability between rooms, but only if the air distribution is addressed with the same care as the heat pump itself.

The same logic applies directly to this SENVILLE 5-ton central system.

16 SEER2: interesting efficiency for a central system of this capacity

The AHRI certificate and brochure list a SEER2 of 16.0 and an EER2 of 10.0.

This efficiency should not be compared directly with the SEER2 ratings of 25 or 30 that can be found on some small wall-mounted heat pumps.

A 5-ton central system must circulate air through a duct network, handle different pressure losses, and supply multiple areas of the building. These are two different types of systems.

The advantage of a central system lies elsewhere: a single system distributes heating and cooling throughout the rooms already connected to the ductwork.

For a homeowner who does not want multiple visible wall-mounted units in the house or who already has functional central infrastructure, this configuration may make much more sense.

Heating at -30 °C: the figure that changes this unit's role in winter

The Senville brochure states that it operates in heating mode down to -30 °C.

Performance at different temperatures is even more interesting than the simple operating limit.

At approximately -8 °C, the capacity used for this configuration is 45,000 BTU/h.

At -15 °C, it reaches approximately 52,000 BTU/h.

At -30 °C, the indicated maximum capacity remains approximately 30,900 BTU/h.

The ENERGY STAR database associated with the model also confirms a continuously variable compressor unit operating with R454B, providing 45,000 BTU/h of heating at 17 °F, or approximately -8 °C, and 52,000 BTU/h at 5 °F, or approximately -15 °C. It also identifies it as a cold-climate system.

This is important information for Quebec's climate.

However, this does not necessarily mean that 30,900 BTU/h is enough to heat an entire house when the outdoor temperature reaches -30 °C.

If the house loses 55,000 BTU/h at this temperature, the system will need supplemental heating to cover the difference.

Why an electric supplemental heating element may still be necessary

Senville also offers this system with an auxiliary heating element option of up to 20 kW, as indicated by the product configuration in the brochure.

In a properly designed installation, auxiliary heating is not intended to operate constantly.

Instead, we aim to keep the heat pump operating for as long as it remains economically and thermally appropriate, then use supplemental heat when the home's heat loss exceeds its available capacity.

The thermostat setting then plays a major role. Incorrect settings can cause the resistance heaters to start far too early and significantly reduce the expected savings from a heat pump.

COP of 1.46 at -30 °C: a figure that helps explain the economic rationale

The COP, or coefficient of performance, compares the thermal energy produced with the electricity consumed.

A conventional electric resistance heater operates essentially at a COP of 1.

This Senville shows approximately:

2.4 at -8 °C, 1.8 at -15 °C, and approximately 1.46 at -30 °C in the data associated with the model.

This means that efficiency decreases at very low temperatures, which is normal, but that the unit theoretically continues to transfer more heat than the electrical energy directly consumed by its compressor.

That is precisely why we consider COP together with capacity.

An impressive COP is useless if the heat pump no longer produces enough BTUs to meet the home’s needs. Conversely, high capacity with a low COP can cost more to operate.

The right system is the one that offers the best compromise within the temperature range in which it will actually operate.

AirGreen installation: with a 5-ton central system, sizing, ductwork, and commissioning matter just as much as the equipment

A 5-ton heat pump is not automatically intended for a “large house”

Senville mentions in its commercial documentation a capacity suitable for spaces of up to approximately 2,000 sq. ft.

At AirGreen, we avoid converting this information into a “square feet = tons” rule.

A recently built 2,000 sq. ft. home with a high-performance envelope may require much less heating and cooling than a home of the same size built several decades ago with significant air infiltration.

Conversely, a home with high ceilings, large window areas, and a partially above-grade basement may have a much higher load.

For a central heat pump installation in Montreal, Laval, Longueuil, on the South Shore or the North Shore, we therefore examine the building’s actual load.

An oversized system may create cycles that are too short and impair dehumidification.

An undersized system may constantly operate at maximum capacity and call on auxiliary heating too often.

Dehumidification: approximately 12.4 pints per hour under the published conditions

The brochure lists a moisture-removal capacity of 5.87 L/h, which corresponds approximately to the 12.4 pints per hour indicated in the product data.

This information becomes important on humid days in July and August.

A properly sized central heat pump should not simply lower the temperature quickly. It must also run long enough to remove moisture from the air.

That is why oversizing a central system “to be safe” can produce the opposite of what the homeowner wants: a cold but still humid house.

An AirGreen project in Brossard: central comfort is not just about BTUs

For a central heat pump installation in Brossard, our team replaced an aging system in a single-family home. The client’s objective was clear: maintain consistent comfort throughout the home, reduce noise, and limit dependence on supplemental electric heating.

After analyzing the building and existing ductwork, we integrated an inverter-based central system. The desired and observed result on this type of project is a more stable temperature from room to room and quieter operation than with the previous configuration.

The lesson applies directly to Senville: the right capacity must work with the right ductwork.

Dimensions and weight: the mechanical room must be checked before delivery

The indoor unit measures approximately:

21.02 in × 24.49 in × 52.99 in

and weighs approximately 162.92 lb.

The outdoor unit measures:

37.48 in × 16.34 in × 52.48 in

for approximately 242.95 lb.

These dimensions make planning particularly important when replacing a system in a finished basement.

We specifically check door widths, stair access, clearance in front of service panels, the location of the lines, and the transition between the indoor unit and the existing plenum.

A unit that fits into the mechanical room but no longer leaves enough space to replace a motor or access the drain is not properly installed.

R454B: replacing an old central system requires new methods

The SENDC-60HF operates with R454B, with a charge listed by Senville of approximately 183.42 oz for the published configuration.

R454B is a low-flammability A2L refrigerant.

The product line manual specifies a leak detection system: if the sensor detects refrigerant, the outdoor compressor stops and the indoor fan is activated according to the system’s safety logic.

For our R454B central installations, we therefore apply adapted procedures: A2L-compatible equipment, careful connections, leak testing, proper circuit evacuation, drainage inspection, and documented commissioning.

We have already encountered this reality in our R454B central heat pump projects in Montérégie. In Mont-Saint-Grégoire, for example, the outdoor unit had to be integrated into a limited space while maintaining clearances, service access, and protection against snow and moisture.

3/8 in – 3/4 in piping: a critical consideration during replacement

The planned configuration uses 3/8 in – 3/4 in piping.

When an old central heat pump is replaced, we systematically check the existing dimensions rather than assuming they are compatible.

We also examine the condition of the copper, its insulation, length, routing, and compatibility with the new R454B system.

Reusing an inaccessible conduit inside a wall may make sense, but only when its compliance has been confirmed. Convenience must never replace the manufacturer’s requirements.

The electrical circuit: 40 A MCA and 40 A maximum protection

The technical documentation indicates a 208/230 V single-phase power supply, a minimum ampacity of 40 A, and maximum protection of 40 A.

This concerns the heat pump itself.

If an auxiliary electric heating element is added, the system’s overall electrical requirements may become significantly greater. The property’s electrical panel must therefore be evaluated based on the complete configuration.

For a central-system conversion, this check must be completed before ordering the electrical work, especially in homes where an older gas- or oil-fired system was previously installed.

65 dB(A) outdoors: the condenser location deserves serious consideration

Senville indicates approximately 65 dB(A) for the outdoor unit. Indoors, the published levels range from approximately 34.5 to 54.5 dB(A), depending on the airflow.

We therefore avoid placing the condenser directly beneath a bedroom window when the property allows for a better solution.

We also take the surrounding properties into account. In several Montreal boroughs or more densely built-up areas of Longueuil and Laval, the distance between two buildings is limited.

A good location must balance performance, clearances, snow, vibration, service access, and acoustic comfort.

The $5,400 LogisVert rebate: where exactly does this amount come from?

The capacity used for the calculation is 45,000 BTU/h at -8°C.

Hydro-Québec currently indicates that a certified ENERGY STAR – Cold Climate heat pump may qualify for $120 per 1,000 BTU/h at -8°C when all program requirements are met.

For this Senville:

45 × $120 = $5,400

The displayed amount of 5 400 $ therefore corresponds exactly to this formula.

The ENERGY STAR database associated with identifier 3649599 does list the SENDC-60HF-OG / SENDC-60HF-IG combination, AHRI number 215735330, R454B, and the cold climate classification.

To determine a project’s actual eligibility, we always verify the lists and conditions in effect on the installation date, because Hydro-Québec specifies that the amount and eligibility are determined according to that date.

An important nuance about ENERGY STAR

Some product information sheets may display data that has not yet been harmonized following a certification update.

In this specific case, the number AHRI 215735330 is active, and the ENERGY STAR database associated with the model identifies it as cold climate.

For a LogisVert application, we therefore rely on the exact match and the official lists applicable at the time of the work, rather than on a simple isolated “yes” or “no” on a product page.

Warranty: verify which contractual coverage applies to the AirGreen project

The current Senville brochure indicates a manufacturer’s warranty of 10 years on the compressor and 5 years on parts.

The AirGreen product information sheet may, for its part, present coverage 10-10-0 as well as the possibility of an additional warranty.

The difference may result from the warranty program applicable to the sales channel or from additional coverage. We therefore specify the exact coverage directly on the quote and in the documents provided to the customer.

For the homeowner, these are the documents, along with the model and serial numbers, that must be kept.

Symptoms indicating that a central system does not simply have a “heat pump problem”

On a system of this size, several comfort problems may originate in the ductwork rather than the compressor.

If some bedrooms remain much colder than others, we check the balancing and ductwork.

If the unit seems to be blowing very forcefully and noisily, we check the static pressure, return-air paths, and restrictions.

If the air conditioning reaches the setpoint quickly but leaves high humidity, we look at the sizing and cycle duration.

If the auxiliary heating elements start too often, we check the thermostat, supplemental heating settings, the heat pump’s actual capacity, and the building’s heat losses.

If water appears around the indoor unit, we inspect the drain, pan, slope, and condensation management.

That is precisely why a central heat pump must be diagnosed as a complete system.

For which project is the SENVILLE SENDC-60HF particularly appealing?

This central system becomes a suitable option for a property that already has a duct network capable of supporting the required airflow, needs substantial capacity, and whose owner wants to use the heat pump for a significant portion of winter heating.

It is also appealing for a project seeking a central system R454B, inverter technology, heating capacity down to -30 °C, and even distribution across several rooms without installing multiple wall-mounted units.

We would be more cautious if the building had insufficient ductwork, if its actual load were much lower than 5 tons, or if the mechanical space did not allow for proper installation and maintenance.

Why entrust this installation to AirGreen

A SENVILLE 5-ton central heat pump is an important piece of equipment, but the final result depends on the complete system surrounding it.

At AirGreen, we work on central systems in Montreal, Laval, Longueuil, the South Shore, the North Shore, and Montérégie, assessing both the equipment and its surroundings: ductwork, return air, electrical supply, plenums, drainage, outdoor unit location, refrigerant piping, and auxiliary heating strategy.

Our recent experience with R454B central systems in Mont-Saint-Grégoire, Saint-Valentin, Hemmingford, Brossard, and Greater Montreal regularly reminds us of the same thing: a properly selected central system must also be correctly integrated into the building.

Request an AirGreen quote for the SENVILLE 5-Ton Central Heat Pump

For a SENVILLE R454B 5-Ton Central Heat Pump – 60,000 BTU in Montreal, Laval, Longueuil, the South Shore, the North Shore, or Montérégie, contact AirGreen.

We can check the heat load, ductwork, electrical panel, piping, auxiliary heating capacity, equipment location, and eligibility for the $5,400 LogisVert rebate before finalizing the configuration.

A system of this capacity must be selected as a complete system, not as a simple replacement based on the number of tons listed on the old unit.