multiple zones
outdoor unit
CU-2Z41CBE
cabinet width
Panasonic's Free Multi Z multi-split range does something a lot of UK homes and small offices genuinely need: it drives several independently controlled rooms — bedrooms, a home office, a living room — from a single outdoor condenser. One outside box instead of two, three, four or five. It uses R32 refrigerant across the range, and pairs with the ultra-slim TZ super-compact wall-mounted indoor units, built for tight spaces and quiet enough for bedrooms.
This guide walks through how the system works, exactly what the TZ super-compact indoor unit brings to the room, and — the part that matters most when specifying a system — which outdoor units pair with which combinations of indoor units. Combination charts are where most multi-split installations get sized wrongly, so we've broken every outdoor unit in the range down individually.
How a Panasonic multi-split system works
A multi-split system connects one outdoor condensing unit to two or more indoor units via refrigerant pipework. Each indoor unit is thermostatically controlled on its own, so the bedroom can run at a different temperature and schedule to the living room, all sharing a single outdoor box.
One outdoor unit, multiple pipes
The Free Multi Z outdoor unit has 2, 3, 4 or 5 refrigerant connection ports. Each port feeds one indoor unit through a dedicated pair of R32 refrigerant lines (liquid and gas).
Inverter modulates output
An inverter-driven rotary compressor ramps output up and down to match the combined real-time demand across every connected room, rather than cycling on and off.
Each room controls itself
Every TZ indoor unit has its own thermostat, remote and Wi-Fi control via the Panasonic Comfort Cloud app — plus Alexa and Google Assistant — so zones run to their own schedule and setpoint.
Heats and cools year-round
Every Free Multi Z outdoor unit is a reverse-cycle heat pump, providing cooling in summer and efficient heating down to −15°C outdoor ambient in winter, plus dehumidification.
The TZ super-compact indoor unit
The TZ range is Panasonic's most compact wall-mounted domestic indoor unit, purpose-built for rooms where a standard-height cassette or indoor cabinet won't fit. Every model in the range — from the 2.0kW right up to the 6.0kW — shares the same slim cabinet: 290mm high × 765mm wide × 214mm deep. Only the 7.1kW top-of-range steps up in size for the extra output.
- Fits above a doorframe. At 290mm high, the smaller TZ units clear the average UK door opening with room to spare, freeing up prime wall space elsewhere in the room.
- nanoe X air purification built in. Continuous release of hydroxyl radicals helps inhibit airborne pollutants, bacteria, viruses and odours — no filter cartridge to replace.
- PM2.5 filtration as standard to capture fine airborne particulates, plus Aerowings directional airflow louvres to direct air more precisely around the room.
- As quiet as 20 dB(A) in quiet mode — genuinely bedroom-friendly.
- Built-in Wi-Fi via the Panasonic Comfort Cloud app, with Google Assistant and Amazon Alexa voice control support.
Single-split vs multi-split at a glance
If you're only cooling and heating one room, a single-split unit is usually the simpler and cheaper answer. Multi-split earns its place from two rooms upwards, and the further up the head count you go, the more it saves on external plant space.
| Single-split | Multi-split (Free Multi Z) | |
|---|---|---|
| Rooms served | 1 | 2–5 per outdoor unit |
| Outdoor units needed | 1 per room | Just 1 for the whole system |
| External wall clutter | Grows with every zone | Fixed — one condenser |
| Independent room control | Yes | Yes — each indoor unit runs independently |
| Best for | A single room, or rooms far apart | Multi-room homes, flats, small offices |
| Installation | F-Gas certified engineer | F-Gas certified engineer |
Watch: how the multi-split system connects together
Panasonic's official multi-split system overview. Watch on YouTube →
Compatibility & combinations: which outdoor unit for which rooms
Every Panasonic Free Multi Z outdoor unit has two hard specification limits that dictate what it can drive:
- Number of connection ports — hard-wired into the unit (2, 3, 4 or 5).
- Combined indoor capacity range — the sum of the nominal cooling kW of every connected indoor unit must fall between the outdoor unit's minimum and maximum connectable range.
The combined indoor capacity does not equal the outdoor unit's nominal kW. Panasonic uses diversity — the assumption that not every room calls for full output at the same time — so the connectable indoor total is typically higher than the outdoor rating. A pair of 2.5kW indoor units (5.0kW combined) doesn't need a 5.0kW outdoor unit; the 4.1kW CU-2Z41CBE covers it comfortably.
The outdoor unit line-up at a glance
| Model | Nominal cooling | Ports | Connectable indoor range | Best for |
|---|---|---|---|---|
| CU-2Z41CBE | 4.1 kW | 2 (both required) | 3.2 – 6.0 kW | 2 small-to-medium rooms |
| CU-3Z52CBE | 5.2 kW | 3 | 4.5 – 9.5 kW | 2–3 small-to-medium rooms |
| CU-3Z68CBE | 6.8 kW | 3 | 4.5 – 11.2 kW | Up to 3 rooms including a larger living space |
| CU-4Z68CBE | 6.8 kW | 4 | Consult combination chart | Up to 4 small-to-medium rooms |
| CU-4Z80CBE | 8.0 kW | 4 | Consult combination chart | Up to 4 rooms including a large living space |
| CU-5Z90CBE | 9.0 kW | 5 | Consult combination chart | Whole-home domestic multi-zone |
TZ indoor unit compatibility
Every TZ super-compact indoor unit — from the 2.0kW CS-TZ20CKEW up to the 7.1kW CS-TZ71ZKEW — is compatible with every Free Multi Z outdoor unit in the range, provided the combined nominal cooling capacity of all connected indoor units lands inside that outdoor unit's connectable range. Panasonic's Free Multi Z platform also supports Etherea wall-mounted indoor units alongside TZ.
Worked examples using the CU-2Z41CBE (2-port, 3.2–6.0kW range)
The smallest outdoor unit is a good illustration of how combinations work in practice. All three of these pairings are valid:
Small home office + spare bedroom
2.0kW + 2.0kW = 4.0kW2 × CS-TZ20CKEW on the CU-2Z41CBE. Two small rooms, sits neatly inside the 3.2–6.0kW range.
Bedroom + living room
2.5kW + 3.5kW = 6.0kWCS-TZ25CKEW + CS-TZ35CKEW. At the top of the connectable range — still valid.
Two matched bedrooms
2.5kW + 2.5kW = 5.0kW2 × CS-TZ25CKEW. Comfortable middle of the range, both rooms independently controlled.
Not valid: two large rooms
5.0kW + 3.5kW = 8.5kWExceeds the 6.0kW max. Step up to the CU-3Z52CBE (4.5–9.5kW) or above.
Sizing the outdoor unit for larger properties
The step up from the 2-port to the 3-, 4- and 5-port outdoor units follows the same logic — the combined nominal cooling of every connected indoor unit must fall inside the outdoor unit's connectable range. As a rough sizing guide:
- Small flat, 2 rooms: CU-2Z41CBE with two small-to-medium TZ heads.
- Flat or small home, 3 rooms: CU-3Z52CBE for smaller rooms, CU-3Z68CBE where one room is a larger living space.
- Larger home, 4 rooms: CU-4Z68CBE for smaller rooms across the board, CU-4Z80CBE where the total load is higher.
- Whole-home, 5 rooms: CU-5Z90CBE — the top of the domestic Free Multi Z range.
For the exact combination chart on the 3-, 4- and 5-port units, we always recommend cross-checking against Panasonic's official datasheet for the specific outdoor unit before ordering — the linked datasheets on each product page carry the full connectable-range matrix.
Panasonic Free Multi Z outdoor units
PANASONIC
CU-2Z41CBE — 4.1kW, 2 Connections
The entry point into the Free Multi Z range. Class-leading A+++ SEER 9.10, connectable range 3.2–6.0kW combined, both ports must be used.
£1,100.00 inc. VAT
PANASONIC
CU-3Z52CBE — 5.2kW, 3 Connections
Three-port outdoor unit for smaller multi-zone installs. Connectable indoor range 4.5–9.5kW combined — ideal for two bedrooms plus a small living space.
£1,450.00 inc. VAT
PANASONIC
CU-3Z68CBE — 6.8kW, 3 Connections
Higher-capacity three-port outdoor. Connectable range 4.5–11.2kW combined — suits homes with one larger living space plus two bedrooms.
£1,700.00 inc. VAT
PANASONIC
CU-4Z68CBE — 6.8kW, 4 Connections
Four-port outdoor unit for four-zone homes. Runs four independently controlled TZ indoor units from a single compact condenser.
£1,900.00 inc. VAT
PANASONIC
CU-4Z80CBE — 8.0kW, 4 Connections
Higher-capacity four-port outdoor. Suits four rooms including a larger living area or open-plan space demanding more nominal output.
£2,370.00 inc. VAT
PANASONIC
CU-5Z90CBE — 9.0kW, 5 Connections
The top of the domestic Free Multi Z range. Five independently controlled zones from one outdoor unit — the whole-home solution.
£2,730.00 inc. VAT
TZ Super Compact indoor units with nanoe X
PANASONIC
CS-TZ20CKEW — 2.0kW Indoor Unit
Smallest output in the TZ range. Built for box rooms, small home offices and tight above-door spaces. 20 dB(A) quiet mode, nanoe X, 765mm cabinet.
£315.00 inc. VAT
PANASONIC
CS-TZ25CKEW — 2.5kW Indoor Unit
Popular sizing for standard UK bedrooms and small studies. Same slim 765mm cabinet, same nanoe X purification, same Wi-Fi and voice control.
£330.00 inc. VAT
PANASONIC
CS-TZ35CKEW — 3.5kW Indoor Unit
Well-suited to medium-sized living rooms and larger bedrooms. Aerowings directional airflow keeps the room evenly conditioned.
£390.00 inc. VAT
PANASONIC
CS-TZ50CKEW — 5.0kW Indoor Unit
Larger living rooms, open-plan kitchen-diners and small commercial spaces. Retains the compact TZ cabinet while delivering 5.0kW nominal cooling.
£470.00 inc. VAT
PANASONIC
CS-TZ60CKEW — 6.0kW Indoor Unit
Large-room capacity in the same TZ cabinet footprint — well-suited to open-plan living spaces or larger commercial rooms.
£615.00 inc. VAT
PANASONIC
CS-TZ71ZKEW — 7.1kW Indoor Unit
Top of the TZ range for the largest domestic and light-commercial spaces. Cabinet steps up in size for the extra output while retaining the range's core features.
£730.00 inc. VAT
Feature highlights across the range
- Compact everywhere765mm-wide TZ indoor cabinet, small footprint on the outdoor units too — CU-2Z41CBE is only 619 × 824 × 299mm.
- R32 refrigerantLower global warming potential than R410A and improved system efficiency — used across the whole Free Multi Z range.
- Class-leading efficiencyUp to A+++ SEER 9.10 and A++ SCOP 4.80 on the CU-2Z41CBE, among the highest in Panasonic's domestic multi-split line-up.
- nanoe X air purificationContinuous release of hydroxyl radicals to help inhibit airborne pollutants, bacteria, viruses and odours.
- Built-in Wi-Fi & voice controlPanasonic Comfort Cloud app, plus Google Assistant and Amazon Alexa compatibility on every TZ indoor unit.
- Genuine year-round heat pumpRated to operate in heating mode down to −15°C outdoor ambient temperature — not just a summer cooling unit.
- Independent zone controlEvery indoor unit runs to its own thermostat, schedule and setpoint. Bedroom stays cool overnight; living room only comes on when you're there.
- PM2.5 filtration & Aerowings airflowFine-particulate filtration plus louvre technology that distributes air more evenly around the room.
F-Gas certified installation is required
Every unit in the range runs on R32 refrigerant, a fluorinated greenhouse gas covered by UK F-Gas Regulations. Installation, commissioning and any refrigerant handling must be carried out by an F-Gas certified engineer, and we are legally required to verify your F-Gas certification before supplying restricted refrigerants. Orders without valid certification can't be processed.
You can submit your F-Gas certification via the certification form, or get in touch with our team for guidance on installation planning, pipe runs and system design before you order.
Not sure which combination fits your property?
Our team can help you spec the right outdoor unit and TZ indoor unit combination for your rooms — including pipe run planning and F-Gas installation guidance.
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