Zephyr CB22 R32 ZE-24CB22 wall-mounted heat pump – A robust 24,000 BTU solution for large spaces

A 24,000 BTU wall-mounted heat pump designed for large spaces

The Zephyr CB22 R32 ZE-24CB22 wall-mounted heat pump is aimed at owners looking for a powerful, easy-to-use HVAC solution suited for large residential or light commercial spaces. With its 24,000 BTU cooling capacity and 24,000 BTU heating capacity at 8.3 °C, this model is designed to provide serious comfort in a large open area, a spacious ground floor, a large condo, an office, a store, or a room that is difficult to stabilize.

At AirGreen, we recommend this type of device when the need goes beyond simple occasional cooling. A 24,000 BTU wall-mounted heat pump must be properly sized, well positioned, and installed according to good HVAC practices. In Montreal, Laval, Longueuil, on the South Shore and North Shore, we often see spaces where area alone is not enough to choose the right capacity. You also have to consider insulation, ceiling height, sun exposure, window area, air circulation, and room layout.

The Zephyr ZE-24CB22 stands out with its operation on R-32 refrigerant, its DC Inverter technology, heating down to -25 °C, air conditioning mode down to -15 °C, high airflow, and many comfort functions. It is an interesting machine for customers who want a high-performance wall-mounted heat pump without necessarily opting for a central or multi-zone system.

Important technical features of the ZE-24CB22 model

For the model ZE-24CB22, the main brochure data are as follows:

• Brand: Zephyr
• Series: CB22 R32
• Model: ZE-24CB22
• Type: wall-mounted heat pump
• Cooling capacity at 35 °C: 24,000 BTU/h
• Heating capacity at 8.3 °C: 24,000 BTU/h
• SEER2: 19.5
• HSPF2 IV: 9
• EER2: 10.6
• Heating COP at 8.3 °C: 3.3
• Heating COP2: 11.3 Btu/W
• Nominal heating capacity at -8.3 °C: 20,800 BTU/h
• Maximum heating capacity at -15 °C: 18,200 BTU/h
• Maximum heating capacity at -20 °C: 16,000 BTU/h
• COP at -15 °C: 1.9
• Refrigerant: R-32
• Refrigerant charge: 47.62 oz
• Airflow: 466 to 647 CFM
• Indoor sound pressure: 49 / 46 / 39 / 37 / 33 dB(A)
• Outdoor sound pressure: 60 dB(A)
• Voltage: 208/230 V, 60 Hz, 1 phase
• Nominal cooling current: 10 A
• Nominal heating current: 9.5 A
• MCA: 21 A
• MOP: 25 A
• Required communication wire: 4/14 copper stranded 600 V
• Compressor: GMCC rotary
• Indoor DC motor: yes
• Outdoor DC motor: yes
• Liquid pipe: 3/8 in
• Gas pipe: 5/8 in
• Total piping length: 10 to 98 ft
• Maximum elevation difference: 50 ft
• Precharge length: 25 ft
• Indoor unit dimensions: 42 1/16 x 12 5/8 x 9 1/16 in
• Outdoor unit dimensions: 33 7/8 x 25 1/2 x 12 3/16 in
• Cooling operating range: -15 °C to 48 °C
• Heating operating range: -25 °C to 24 °C
• Zephyr basic warranty: 10 years parts
• Labor warranty: available according to the distributor

This information is essential before any installation. A 24,000 BTU wall-mounted heat pump on 208/230 V with a MCA of 21 A and MOP of 25 A is not installed like a small 9,000 or 12,000 BTU unit. The electrical panel, wiring gauge, required protection, piping routing, and clearances around the outdoor unit must be checked.

Heating and cooling performance in Quebec

The brochure states that the Zephyr CB22 heat pump can provide heating down to -25 °C and cooling operation down to -15 °C. For Quebec, this is a very important point, especially for customers located in Montreal, Laval, Longueuil, on the North Shore or South Shore, where winters can quickly vary between humidity, frost, thaw, snow, and severe cold.

For the ZE-24CB22 model, low-temperature heating performance deserves special attention:

• 20,800 BTU/h at -8.3 °C
• 18,200 BTU/h at -15 °C
• 16,000 BTU/h at -20 °C

These figures show that the unit maintains useful capacity even when the outside temperature drops. However, it must be clear: a high-performance wall-mounted heat pump does not always replace 100% of the main heating in all homes, especially in older buildings, poorly insulated, with many windows, or exposed to wind.

At AirGreen, we always explain this reality before installation. A heat pump like the ZE-24CB22 can significantly reduce the use of electric baseboards or other supplementary heating, but the actual result will depend on the building. In a large, well-insulated open area, it can provide remarkable comfort. In an older home with closed-off rooms, air distribution can become more complex.

In air conditioning, the capacity of 24,000 BTU/h allows for treating large spaces. The airflow of 466 to 647 CFM helps move a high volume of air, which is particularly relevant in open rooms or areas where hot air accumulates quickly in summer.

R-32, DC inverter, and stable daily comfort

The Zephyr CB22 ZE-24CB22 operates with R-32, a refrigerant used in several new generations of wall-mounted heat pumps. For the customer, the type of refrigerant may sometimes seem secondary, but it is part of the overall design of the device and good installation practices.

The model also uses variable frequency technology, often called Inverter. This technology allows the heat pump to adjust its power in real time instead of simply operating on an on-off basis. The desired result is more stable comfort, fewer temperature fluctuations, and better-controlled energy consumption.

The brochure highlights this comfort logic: the machine adjusts its power according to the room’s needs. For an owner, this generally means a more consistent temperature, fewer abrupt cycles, and a better comfort feeling, especially in large spaces where air can be harder to balance.

The installation remains crucial. Even a good Inverter heat pump can deliver mediocre results if the indoor unit is poorly placed, if the refrigerant lines are improperly installed, if the vacuum is not done correctly, or if the outdoor unit lacks clearance.

HVAC installation: points to check before confirming the project

A 24,000 BTU wall-mounted heat pump installation requires proper planning. At AirGreen, we always consider several factors before recommending or confirming an installation of the ZE-24CB22.

Location of the indoor unit

The indoor unit measures 42 1/16 x 12 5/8 x 9 1/16 in. It is therefore wider than a standard small wall-mounted heat pump. You need to plan for a sufficiently clear wall, a good height, a realistic passage for the piping, and an orientation that promotes air diffusion.

Positioning is crucial. A 24,000 BTU unit can move a lot of air. If installed directly facing a sofa, work table, or bed, the customer may feel a draft even if the temperature is correct. The goal is to distribute air in the main area without causing discomfort.

Outdoor unit location

The outdoor unit measures 33 7/8 x 25 1/2 x 12 3/16 inches. It must be installed on a solid base, with sufficient clearances to allow good air circulation. The indicated outdoor noise level is 60 dB(A), which must also be considered in denser areas like Montreal, Longueuil, or certain neighborhoods of Laval.

In winter, the location must consider snow, ice, gutters, water drainage, and maintenance access. A poorly placed outdoor unit can lose performance, accumulate unnecessary ice, or become difficult to maintain.

3/8 - 5/8 inch piping

The model ZE-24CB22 uses 3/8 inch liquid and 5/8 inch gas piping. This is a very important point during a replacement. Many customers want to reuse the old lines to reduce work, but you should never assume the existing lines are compatible.

We always check:

• the exact diameter of the lines;
• the condition of the copper;
• the total length;
• the old type of refrigerant;
• the accessibility of the route;
• the possibility of cleanly replacing the lines;
• the risks of contamination;
• the impact on warranty and performance.

In many situations, replacing the piping is the best decision, even if it requires more work initially.

Power supply 208/230 V

The technical sheet indicates a power supply of 208/230 V, 60 Hz, single phase, with MCA of 21 A and MOP of 25 A. This means an electrical inspection is mandatory before installation.

In some older homes, the electrical panel may already be fully loaded. It is then necessary to check the available space, panel capacity, required breaker, and wire gauge. A realistic installation price must take this electrical part into account from the start.

Noise level, airflow, and indoor comfort

The ZE-24CB22 has an indoor sound pressure level indicated at 49 / 46 / 39 / 37 / 33 dB(A) depending on speeds, with a lower level in silent mode. For a high-capacity unit, these levels are consistent with a machine designed to move a good volume of air.

The airflow of 466 to 647 CFM is particularly important. It allows the unit to better distribute heat or coolness in an open space. But again, it all depends on the actual setup. In an open area, this airflow can be a major advantage. In a closed or poorly oriented room, it can become too powerful if the machine is oversized.

Proper sizing is therefore essential. A 24,000 BTU unit should not be chosen simply because it is “stronger.” An overly powerful device can quickly reach the temperature in cooling mode but reduce dehumidification time. Result: the room may feel cool but still humid. Conversely, an undersized unit will run constantly and struggle during very hot or very cold days.

Practical features: 4D mode, silent, night, iFeel, and automatic cleaning

The brochure presents several interesting features for daily comfort. Among the most important:

• Night Mode
• Silent Mode
• iFeel Mode
• Quick Start
• Base Heating
• Compressor Heating
• Chassis Heating for Outdoor Base
• Fire-Resistant Electrical Box
• Auto-Adaptive Voltage Technology
• Two-Sided Drain
• 24-Hour Timer
• Automatic Oscillation
• 4D Mode
• LED dimmer
• 5 indoor fan speeds
• LED wireless remote control
• Automatic heating 8 °C / 46 °F
• Reversible drain hose
• Turbo function
• Automatic defrost
• Automatic cleaning
• Diffuser position memory

The 4D mode and automatic oscillation allow better air distribution in the room. This is useful to avoid cold or hot spots, especially in a large open area. The iFeel mode helps adjust comfort based on the temperature sensed near the remote control. The silent mode and night mode are convenient for reducing noise when a quieter operation is desired.

The basic heating, compressor heating, and heated chassis for the outdoor base are particularly useful in a climate like Quebec’s. These features help support the unit’s winter operation, especially when outdoor conditions are harsh.

Zephyr maintenance, reliability, and warranty

The brochure states a 10-year Zephyr basic parts warranty. It also mentions that a labor warranty is available, depending on the distributor. For the customer, this means clarifying the coverage offered before purchase: parts, labor, diagnostics, travel, maintenance conditions, and warranty registration.

A wall-mounted heat pump like the ZE-24CB22 must be maintained regularly to retain its efficiency. We especially recommend:

• clean the indoor filters frequently;
• keep the outdoor unit clear;
• check the condensation drain;
• monitor abnormal ice buildup;
• have the device inspected if the noise changes;
• clean the heat exchanger when necessary;
• schedule professional maintenance according to usage.

Proper maintenance extends the device’s lifespan, maintains performance, and reduces the risk of breakdowns. Features like automatic cleaning or automatic defrosting are useful, but they do not replace a clean installation or serious maintenance.

Why choose AirGreen to install the ZE-24CB22

At AirGreen, we install HVAC systems in houses, condos, plexes, businesses, and offices in Montreal, Laval, Longueuil, on the South Shore, and the North Shore. Our role is not limited to mounting a heat pump on the wall. We analyze the project to choose the right device, the right location, and the right installation method.

For a model like the Zephyr CB22 R32 ZE-24CB22, our team checks:

• required capacity according to the space;
• optimal location of the indoor unit;
• location of the outdoor unit;
• piping routing;
• electrical compatibility;
• clearances;
• drainage;
• winter constraints;
• access for maintenance;
• the client’s actual expectations.

This approach avoids several common mistakes: device too powerful, poor air distribution, outdoor unit too close to an obstacle, incompatible refrigerant line, undervalued electrical circuit, or installation difficult to maintain.

The ZE-24CB22 is an interesting wall-mounted heat pump for large spaces that require good heating and cooling capacity. With its 24,000 BTU, R-32 refrigerant, operation down to -25 °C in heating mode, high airflow, 4D mode, and 10-year parts warranty, it can be a solid HVAC solution for many projects.

To get a clear quote, compare this model with other wall-mounted heat pumps or schedule an installation in Montreal, Laval, Longueuil, on the South Shore or the North Shore, contact AirGreen. Our team will help you choose a solution suited to your building, budget, and comfort goals.