SENVILLE SENA R454B Ceiling Cassette Air Conditioner | 12000 BTU

A 12,000 BTU ceiling cassette that frees up the walls while providing cold-climate heating down to -30 °C

The SENVILLE SENA 12,000 BTU R454B ceiling cassette is intended for projects where a conventional wall-mounted unit may not be the best solution. In a large open room, an office, a commercial space, a meeting room, a condo with few available walls, or a room where aesthetics are especially important, integrating the indoor unit into the ceiling can improve both air distribution and the use of space.

At AirGreen, when we prepare a ceiling cassette installation in Montreal, Laval, Longueuil, on the South Shore or the North Shore, we look at much more than the 12,000 BTU capacity. A cassette requires technical space above the ceiling, proper condensate drain planning, and future access for maintenance. When these conditions are met, the result can be particularly clean: the unit occupies very little visible space, and air is distributed from the ceiling rather than from a wall.

The combination presented by AirGreen uses:

• outdoor unit: SENA-12HF-OG;
• indoor unit: SENA-12HF-ICG;
• AHRI: 215735305;
• ENERGY STAR ID: 3630052;
• nominal cooling capacity of 12,000 BTU;
• refrigerant R-454B;
• heating operation down to -30 °C;
• SEER2: 22.2;
• EER2: 12.5;
• HSPF2: 11.6;
• ENERGY STAR certification;
• Cold Climate qualification;
• WiFi available as an option.

The Senville brochure confirms that this is a 12,000 BTU ceiling cassette heat pump, ENERGY STAR certified, designed to provide heating and cooling and advertised to operate in heating mode down to -30 °C.

Why choose a cassette rather than a wall-mounted heat pump?

The first difference is visually obvious: the indoor unit is integrated into the ceiling.

The cassette body measures approximately 22.44 × 22.44 × 9.65 in and weighs approximately 35.27 lb.

This configuration becomes appealing when the available walls are occupied by:

• large windows;
• cabinets;
• artworks or architectural features;
• shelves;
• commercial furniture;
• doors or openings.

It also makes it possible to position the unit closer to the center of the area being treated in certain projects.

In a rectangular room, a wall-mounted unit installed at one end must project its air over a long distance. A properly positioned cassette can distribute air from a more central location, which can help improve temperature uniformity.

The essential technical specifications

The official documentation confirms modulation ranges of 3,800 to 15,100 BTU in cooling and 5,300 to 16,200 BTU in heating, as well as a region 4 HSPF2 of 11.6 and a nominal COP of 3.7.

This variable capacity is important. The unit does not operate constantly at 12,000 BTU. When the thermal load is low, the inverter compressor can reduce its output; when demand increases, it can rise above the nominal capacity under certain conditions.

SEER2 of 22.2: a good efficiency level for a ceiling cassette

The brochure lists a SEER2 of 22.2 and an EER2 of 12.5.

This represents an interesting level of efficiency for a cassette system, particularly when compared with older central air conditioners or on/off equipment.

Senville also advertises annual savings of up to 40% under certain comparison conditions.

However, we prefer to rely on technical ratings rather than promise a precise percentage on the electricity bill. Actual savings always depend on:

• the system being replaced;
• insulation;
• the requested temperature;
• the number of hours of use;
• windows;
• solar exposure;
• occupant habits.

Heating down to -30 °C: look at the available BTUs, not just the minimum temperature

The AirGreen specifications indicate the following capacities:

• 10,000 BTU/h at -8 °C;
• 11,500 BTU/h at -15 °C;
• approximately 4,300 BTU/h at -30 °C.

The stated COP is approximately 2.74 at -8 °C and 1.04 at -30 °C.

These figures are essential for understanding actual performance.

The brochure confirms that the system can operate in heating mode down to -30 °C. But “operates at -30 °C” does not mean “still delivers 12,000 BTU at -30 °C.”

At this extreme temperature, the available capacity decreases significantly.

In an installation in Montréal, Laval, or Longueuil, we must therefore compare the cassette’s heating capacity with the room’s heat loss. In many buildings, supplemental heating remains relevant during cold snaps.

A Cold Climate cassette, not just a ceiling air conditioner

The title “cassette air conditioner” may suggest that it is primarily a summer appliance.

The reality is different.

Senville presents this model as a cold-climate heat pump and indicates operation down to -30°C.

This makes it an appealing solution for a homeowner or business that wants to:

• cool in summer;
• heat in spring and fall;
• continue using the heat pump for much of the winter;
• reduce the use of supplemental electric heating when conditions allow.

Airflow of up to approximately 418 CFM

The documentation indicates four airflow levels:

• 417.9 CFM in Turbo mode;
• 364.9 CFM at high speed;
• 306.1 CFM at medium speed;
• 194.2 CFM at low speed.

This fan modulation accompanies that of the compressor.

As the room approaches its setpoint, the unit can operate more quietly. When a high demand arises, the fan increases its airflow to distribute the available capacity more effectively.

27.5 dB(A) at low speed: an advantage for offices and living spaces

Indoor sound levels range from approximately 27.5 to 46 dB(A), depending on fan speed.

For a ceiling cassette, this is particularly useful.

The unit is generally located above the occupied area, but its low-speed operation can remain discreet in:

• an office;
• a meeting room;
• a living room;
• a bedroom suitable for a cassette;
• a small retail business;
• a professional space receiving clients.

However, placement remains important. A cassette installed directly above a workstation or an area where someone sits for hours must be configured carefully to avoid an uncomfortable draft.

Automatic louvers and airflow adjustment

The AirGreen specification sheet indicates automatic vertical louver control, while horizontal adjustment is listed as manual.

This is a practical detail to plan for during commissioning.

We aim to direct the airflow so that it uses the room’s geometry rather than sending air directly at occupants.

Dehumidification: approximately 1.45 L/h

Senville documentation indicates a moisture removal capacity of 1.45 L/h, or approximately 3.06 pints per hour.

During humid periods in Greater Montreal, dehumidification contributes significantly to comfort.

A room at 23°C with high humidity may feel much less comfortable than a room at the same temperature with better humidity control.

This also means that drain installation is never a secondary detail.

What we check at AirGreen before installing a SENVILLE 12,000 BTU cassette

The space above the ceiling is the first constraint

The inner body is approximately 9.65 in. high.

But having exactly 9.65 inches available is not enough.

We must also plan for:

• refrigerant piping;
• drainage;
• cables;
• connections;
• required clearances;
• future access for maintenance.

That is why we inspect the structure before confirming that a cassette can be installed in the desired location.

A beam, joist, existing ventilation duct, or plumbing can completely change the ideal position.

A common job-site scenario: a visually perfect ceiling, but cluttered above

In ceiling cassette projects, we regularly encounter a situation where the geometric center of the room seems like the obvious location.

When we inspect the service space, we sometimes find:

• a structural beam;
• a large duct;
• a column;
• water pipes;
• cables;
• insufficient clearance.

Moving the cassette a few feet can then avoid much more extensive work without genuinely compromising air distribution.

This is a good example of the difference between selecting equipment and designing its installation.

Drainage must be planned before closing the ceiling

With dehumidification capacity of up to approximately 1.45 L/h, the condensate must be drained reliably.

On a wall-mounted unit, the drain is often fairly visible and accessible.

With a cassette, a significant portion of the installation is concealed.

We must therefore pay particular attention to:

• slope;
• final discharge;
• accessibility;
• drain insulation;
• leak protection.

A condensate problem above a finished ceiling can cause far more damage than a simple improperly positioned outdoor drain.

R-454B precharge for approximately 25 ft

The manufacturer states that the system uses R-454B and is precharged for a line length of up to 25 ft. A 50-foot installation requires refrigerant to be added on site.

The technical data sheet indicates a charge of approximately 35.27 oz.

The piping used is 1/4 in – 3/8 in.

R-454B is an A2L refrigerant. The tools, commissioning procedures, and handling methods must therefore be adapted.

Proper evacuation remains essential

The fact that an outdoor unit is precharged does not mean that the lines are ready for immediate use.

The lines installed on site initially contain air and moisture.

Before releasing the refrigerant into the circuit, we must properly complete the preparation and evacuation procedures.

This step helps prevent:

• circuit contamination;
• reduced performance;
• abnormal pressure;
• long-term problems;
• avoidable service calls.

Power supply: 208/230 V and 15 A protection

The documentation indicates:

• 208/230 V;
• single-phase;
• 60 Hz;
• MCA: 15 A;
• maximum fuse: 15 A.

It also mentions connection wiring 14/4 AWG.

The final circuit must naturally comply with the nameplate data and the electrical requirements applicable to the project.

For a 12,000 BTU heat pump, the electrical demand remains relatively moderate, which facilitates integration into many residential installations.

The outdoor unit remains compact

The outdoor unit measures approximately:

31.69 × 12.99 × 21.81 in

and weighs approximately 72.75 lb.

The stated sound level is 57 dB(A), and its maximum airflow is approximately 1,471.5 CFM.

We must nevertheless plan for:

• a suitable base or support;
• the manufacturer’s clearances;
• snow;
• water drainage during defrosting;
• the distance from windows and terraces;
• access for servicing.

Optional WiFi: useful depending on the building’s use

The AirGreen information sheet indicates that WiFi is available as an option.

This function can be particularly useful in:

• an office;
• a business;
• a dwelling;
• a secondary residence;
• a room used according to a specific schedule.

It allows the temperature to be adjusted to occupancy periods rather than constantly maintaining the same setpoint.

Integrated diagnostics and leak detection

Senville also mentions a self-diagnostic and leak detection system, designed to facilitate the identification of certain problems.

This type of function can help during a service call, but it does not replace a complete diagnosis.

A loss of capacity can have several causes:

• clogged filter;
• fan motor;
• sensor;
• drainage problem;
• refrigerant charge;
• electronic control;
• airflow restriction.

Warranty: the AirGreen information sheet and the brochure currently indicate two different coverage terms

The AirGreen information sheet indicates a warranty:

10 years for the compressor – 10 years for parts – 0 years for labor, with the possibility of an additional warranty.

The Senville brochure, for its part, states 10 years on the compressor and 5 years on parts.

The technical table also lists 10 years for the compressor / 5 years for parts.

The applicable coverage must therefore be confirmed at the time of purchase based on the warranty program, registration, and the seller’s terms.

Advertised provincial rebate: $1,200

The AirGreen information sheet currently indicates a $1,200 provincial rebate for this combination.

It also states:

• ENERGY STAR: yes;
• Cold Climate: yes;
• ENERGY STAR ID 3630052;
• AHRI 215735305.

The brochure confirms ENERGY STAR certification and heating capacity down to -30 °C.

As with any financial assistance program, we recommend confirming the amount and eligibility at the time of the quote.

Cassette or wall-mounted unit: the choice depends as much on the building as on the equipment

A ceiling cassette offers clear advantages:

• unobstructed walls;
• discreet architectural integration;
• air distribution from the ceiling;
• a good choice for certain open spaces;
• relatively quiet operation.

However, it generally requires more preparation.

A wall-mounted heat pump can often be installed without modifying a finished ceiling, whereas a cassette requires technical space and precise planning.

We therefore recommend a cassette when the building and layout genuinely justify its advantages, not simply because it looks more discreet in a photo.

Why choose AirGreen for a ceiling cassette installation

A SENVILLE 12,000 BTU cassette can deliver excellent performance, but the final quality depends largely on how it is integrated into the building.

At AirGreen, we verify:

1. thermal sizing;
2. available ceiling space;
3. structure;
4. refrigerant line routing;
5. drainage;
6. electrical requirements;
7. outdoor unit location;
8. air distribution;
9. future access for maintenance;
10. the applicable rebates and warranties.

We carry out HVAC air-conditioning and heating projects in Montreal, Laval, Longueuil, the South Shore, the North Shore, and Montérégie, with particular attention to building constraints before starting the work.

Our assessment of the SENVILLE SENA 12,000 BTU Cassette

This model offers a well-balanced combination for a homeowner or business that wants a heat pump discreetly integrated into the ceiling:

• 12,000 BTU nominal;
• capacity modulation up to 15,100 BTU in cooling mode;
• capacity modulation up to 16,200 BTU in heating mode;
• SEER2 22.2;
• EER2 12.5;
• HSPF2-4 11.6;
• heating down to -30 °C;
• ENERGY STAR;
• Cold Climate;
• refrigerant R-454B;
• indoor sound level as low as 27.5 dB(A);
• maximum airflow of approximately 418 CFM;
• WiFi available as an option;
• piping 1/4 in – 3/8 in.

Its main advantage is not just its energy efficiency. It is the ability to integrate a high-performance heat pump into a room without using a wall as the air-distribution location.

For a SENVILLE 12,000 BTU ceiling cassette quote, contact AirGreen. We can verify the required capacity, available ceiling space, drainage, piping, and applicable financial assistance before installation in Montreal, Laval, Longueuil, the North Shore, or the South Shore.