The Bosch Multi Split Set combines two Climate 4000i series indoor units with a single outdoor unit and delivers 5.3 kW of cooling and 5.6 kW of heating capacity. The smaller indoor unit has a cooling capacity of 2.6 kW and a heating capacity of 2.9 kW, while the larger unit has 3.5 kW of cooling and 3.8 kW of heating capacity; the lowest specified sound pressure level is 19 dB(A). In cooling mode, the system has an energy efficiency rating of A++ and in heating mode A+ on the A+++ to D scale. As a guideline, the smaller indoor unit is suitable for rooms of approximately 20 to 26 m² and the larger for rooms of approximately 27 to 35 m²^*.

Performance and range of application

The Bosch CL5000M 53/2 E outdoor unit has a cooling capacity of 5.3 kW and a heating capacity of 5.6 kW. The Bosch CL4000iU W 26 E indoor unit has a cooling capacity of 2.6 kW and a heating capacity of 2.9 kW, while the Bosch CL4000iU W 35 E indoor unit has 3.5 kW of cooling and 3.8 kW of heating capacity. Cooling is specified for outdoor temperatures from minus 15 to plus 50 °C, and heating from minus 15 to plus 24 °C. Both indoor units have 1/4" liquid and 3/8" gas pipe connections.

The stated areas of approximately 20 to 26 m² and approximately 27 to 35 m²^* are guidelines for standard room height and normal insulation standards, not a binding design. Which power class is right for your property depends on room height, insulation standards, window areas, shading, and the number of people and devices. With a multi-split system, both indoor units also share the outdoor unit's capacity. We can check the appropriate design for your property upon request.

* Guideline based on the cooling capacity specified by the manufacturer, with a standard room height of approximately 2.5 m, normal insulation standards, and average sunlight exposure. Different conditions on site, such as large window areas, sloped roofs, or a high number of people, may require a different power class. The binding design is carried out on a property-specific basis. For a professional design of your property, please contact us.

The most important advantages at a glance

• Two Climate 4000i series indoor units in two power levels on a single outdoor unit.
• 19 dB(A) as the lowest specified sound pressure level on the smaller indoor unit, with four specified values.
• 5.3 kW cooling and 5.6 kW heating capacity on the outdoor unit, 2.6 kW and 3.5 kW on the indoor units.
• Energy efficiency class A++ in cooling and A+ in heating on the A+++ to D scale, with SEER 6.1 and SCOP 4.0.
• Presence sensor and Follow-Me function via the remote control.
• Heating down to minus 15 °C, cooling down to plus 50 °C outdoor temperature.
• Two identical sets of pipes, both indoor units specified with 1/4" and 3/8".

Detailed functions

Multi-split principle

Two indoor units are connected to a single outdoor unit and share its capacity. The outdoor unit has a cooling capacity of 5.3 kW, while the two indoor units have 2.6 kW and 3.5 kW, totaling 6.1 kW. The sum of the indoor units thus exceeds the capacity of the outdoor unit. This is intended with multi-split systems: the design assumes that both indoor units do not continuously run at full load at the same time.

For installation, this means: one outdoor unit, one installation space, one electrical supply. Each indoor unit has its own line to the outdoor unit, so two sets of pipes are required.

Air quality and purification

• HD filter (High Density) in the indoor unit
• Catalytic filter in the indoor unit
• Ionizer in the indoor unit

Operating modes

• Cooling mode from minus 15 to plus 50 °C outdoor temperature
• Heating mode from minus 15 to plus 24 °C outdoor temperature
• Turbo mode and Sleep mode
• Mute operation on the indoor unit
• Temperature maintenance at 8 °C as frost protection

Control and comfort

• Two remote controls included, one for each indoor unit
• Follow-Me function: the remote control serves as a temperature sensor
• Presence sensor, referred to by the manufacturer as a Human sensor
• Optional Wi-Fi control, this page does not mention the required module
• 24-hour timer

Operational safety

• Self-diagnosis on the indoor unit
• Auto-restart after a power interruption
• Temperature compensation and cold air protection
• Two separate refrigerant circuits, one for each indoor unit

Scope of delivery

Standard delivery includes:

• 1x Bosch CL5000M 53/2 E outdoor unit, 5.3 kW cooling capacity
• 1x Bosch Climate 4000i CL4000iU W 26 E indoor unit, 2.6 kW cooling capacity
• 1x Bosch Climate 4000i CL4000iU W 35 E indoor unit, 3.5 kW cooling capacity
• 2x remote controls, one for each indoor unit

What you need in addition

• Piping and installation material for two indoor units, not one
• Wall bracket or floor console for the outdoor unit, designed for 35.0 kg
• Module for Wi-Fi control, if you wish to operate the system via smartphone
• Condensate pump, depending on the installation situation
• Electrical supply and circuit protection
• Installation and commissioning by a specialist company

Technical data

Indoor unit 2.6 kW

Model	1x Bosch Climate 4000i CL4000iU W 26 E
Cooling capacity	2.6 kW
Heating capacity	2.9 kW
Sound pressure level	19 / 22 / 31 / 37 dB(A), four specified values
Dimensions (WxHxD)	802 x 295 x 200 mm, 8.7 kg
Pipe connections Liquid + Gas	6.35 mm (1/4") + 9.52 mm (3/8")

Indoor unit 3.5 kW

Model	1x Bosch Climate 4000i CL4000iU W 35 E
Cooling capacity	3.5 kW
Heating capacity	3.8 kW
Sound pressure level	21 / 22 / 33 / 39 dB(A), four specified values
Dimensions (WxHxD)	802 x 295 x 200 mm, 8.7 kg
Pipe connections Liquid + Gas	6.35 mm (1/4") + 9.52 mm (3/8")
Features of both indoor units	HD filter, catalytic filter, Ionizer, Presence sensor, Follow-Me, Turbo, Sleep mode, Mute, Self-diagnosis, Auto-restart, 24 h timer

Outdoor unit

Model	Bosch CL5000M 53/2 E
Cooling capacity	5.3 kW
Heating capacity	5.6 kW
Sound pressure level outdoor unit	54 dB(A)
Dimensions outdoor unit (WxHxD)	805 x 554 x 330 mm, 35.0 kg
Connections for indoor units	2, both occupied

System

Energy efficiency class Cooling / Heating	A++ / A+, scale A+++ to D
SEER / SCOP	6.1 / 4.0
EER / COP	3.24 / 3.71
Sum of cooling capacity of indoor units	6.1 kW
Cooling operating range	-15 to +50 °C
Heating operating range	-15 to +24 °C
Power supply	220 to 240 V, 50 Hz, 1 phase
Control	2x remote control, Wi-Fi control optional

Frequently Asked Questions

What cooling and heating capacity does the set have?

The set delivers 5.3 kW of cooling and 5.6 kW of heating capacity at the outdoor unit. The two indoor units have different capacities: one with 2.6 kW of cooling and 2.9 kW of heating capacity, and one with 3.5 kW of cooling and 3.8 kW of heating capacity. The energy efficiency rating is A++ in cooling and A+ in heating, on the A+++ to D scale, with a SEER of 6.1 and a SCOP of 4.0.

How do two indoor units work with one outdoor unit?

The two indoor units share the 5.3 kW of the outdoor unit, each via its own refrigerant circuit. It is designed for staggered operation, not for continuous operation of both units at full load.

What happens if both indoor units run at the same time?

Then the outdoor unit distributes its 5.3 kW of cooling capacity between both indoor units. The sum of the two is 6.1 kW, which is 0.8 kW above the capacity of the outdoor unit. Each indoor unit can draw its specified capacity as long as the second one does not request full capacity at the same time. In staggered operation, each indoor unit has the full capacity available. We can check which design is right for your two rooms upon request.

Can the indoor units be different sizes?

Yes, and that is also the case in this set: one indoor unit with 2.6 kW and one with 3.5 kW on a single outdoor unit. Both have the same dimensions, 802 x 295 x 200 mm, they only differ in capacity. The manufacturer specifies two to five indoor units for the outdoor unit series depending on the model; this model has two connections. This set is delivered in the stated combination.

How many indoor units are included in the scope of delivery?

Two. The delivery exclusively includes one Bosch CL5000M 53/2 E outdoor unit, one Bosch Climate 4000i CL4000iU W 26 E indoor unit with 2.6 kW, one Bosch Climate 4000i CL4000iU W 35 E indoor unit with 3.5 kW, and two remote controls. Installation material, refrigerant lines, and brackets are not included.

Is an installation set required for each indoor unit?

Yes. In a multi-split system, each indoor unit has its own line to the outdoor unit, so two sets of pipes are required, not one. Both indoor units are specified with 1/4" on the liquid side and 3/8" on the gas side, although they have different capacities. The two sets of pipes are therefore identical. Installation material is not included in this offer and is selected by the specialist company to suit the installation situation.

How loud is the unit?

The 4000i series indoor units have an additional, lower level. The manufacturer specifies four values for the 2.6 kW indoor unit: 19, 22, 31, and 37 dB(A), and for the 3.5 kW indoor unit: 21, 22, 33, and 39 dB(A). The lowest value is therefore 19 dB(A) on the smaller and 21 dB(A) on the larger indoor unit. We can tell you the assignment of the individual values to the levels upon request, as the specification on the data sheet lists three level designations for four values. For the outdoor unit, a sound pressure level of 54 dB(A) is specified, but this page does not mention a sound power level.

What does the presence sensor do?

Both indoor units have a presence sensor, referred to by the manufacturer as a Human sensor. In addition, there is the Follow-Me function: the remote control serves as a temperature sensor, so the system regulates the temperature at the location where the remote control is located, not at the indoor unit. We can tell you how the presence sensor affects the control upon request.

Can I control the system via an app?

According to the manufacturer, Wi-Fi control is optionally available. This page does not mention the exact designation of the required module and app, but we can tell you upon request. Two remote controls are included in the scope of delivery, one for each indoor unit.

How far apart can the indoor and outdoor units be?

We can tell you the permissible pipe length and the permissible height difference between the outdoor and indoor units upon request. The specialist company determines these values for your installation situation.

Can I use the unit for heating in winter?

Heating mode is specified for outdoor temperatures from minus 15 to plus 24 °C, and cooling mode from minus 15 to plus 50 °C. In heating mode, the system has an energy efficiency rating of A+ on the A+++ to D scale, with a SCOP of 4.0. In addition, the manufacturer specifies temperature maintenance at 8 °C and cold air protection. We can check upon request whether the system is sufficient as the sole heating for your rooms.

Can I install the air conditioner myself?

The installation and commissioning of a multi-split air conditioner is carried out by a certified specialist company. Self-installation is not intended. The outdoor unit weighs 35.0 kg, and the specialist company assesses the load-bearing capacity of the wall and the appropriate bracket on site.