Multi Room Heat Pump Systems

While a standard heat pump system consists of an indoor and outdoor unit, a multi room system allows you to connect multiple indoor units to a single outdoor unit. This system not only gives you the freedom to select the indoor model best suited to each and every room in your home, it also enhances exterior aesthetics by reducing the number of outdoor units required.

What is a multi room system?

We know that every home is as individual as its owner. Mitsubishi Electric multi room heat pump systems allow you to choose the perfect model for each room without the need to install multiple outdoor units.


Why choose a multi room system?

The World Health Organisation recommends a minimum indoor temperature of 18-20°C for living areas and 16°C overnight for bedrooms. With a multi room heat pump system you have the freedom to choose the ideal unit for each area to keep you comfortable, without cluttering the exterior of your home. Plus, you get the benefit of the superior efficiency and energy savings of Mitsubishi Electric heat pump technology.

What indoor units can I connect to my multi room system?

All of the Mitsubishi Electric indoor units listed are compatible on a Mitsubishi Electric multi room outdoor unit. However when deciding which indoor unit(s) you wish to install in your home it is important to keep in mind each multi room outdoor unit varies in the number and size/capacity of indoor units that connect to them.

To help assist your decision, all Mitsubishi Electric indoor units listed have a class rating. This is as simple as referring to the numerical component of the model name e.g., the MSZ-GE25VAD2 has a class rating of 25, the SLZ-KA50VAQ has a class rating of 50 and so on.

To bring the system together, each of our multi room outdoor units have a specified number of indoor units able to be connected (ranging from 2-8 dependent on unit), a maximum class rating which determines which indoor units are compatible (ranging from 22-100) and a total maximum class rating (the class combination of all units connected).

For example the MXZ-3E54VAD could have both an MSZ-GE42VAD2 indoor unit and an MSZ-GE50VAD2 indoor unit connected, as each indoor unit has a maximum class no greater than 50 (one is 42 and the other 50), and the total maximum class combination of all indoors is no greater than 100 (in this case totalling 92).

Three Port Connect 2-3 indoor units (up to Class 50), with max. class total of 100.


It is important to remember that the maximum rated capacity of the MXZ-3E54VAD is 7 kW of heating/5.4 kW of cooling, so depending on the indoor units chosen, the actual capacity of heating/cooling produced by the indoor unit may vary from their actual rated capacity.

For example, if you have an MSZ-GE42VAD2 and an MSZ-GE50VAD2 indoor unit on an MXZ-3E54VAD outdoor, when the two indoor units operate simultaneously in heating mode, the MSZ-GE42VAD2 will produce up to 3.1 kW, and the MSZ-GE50VAD2 will only produce 3.7 kW of its rated heating capacity. When only one of the indoor units is running you will receive up to an impressive 6.8 kW of rated heating capacity from the MSZ-GE50VAD2 alone.

Choosing the right heat pump for your home

We recommend you book a free in-home consultation with one of our qualified installers. Choosing the right heat pump system requires an assessment of the areas to be heated, to ensure you get the best, most efficient system for your home. One of our qualified installers will carry out accurate sizing calculations, and expertly assess other factors involved in heat loss and gain.

Get a recommendation on what heat pump you need for a room.

For large residential homes and commercial buildings please read about City Multi VRF solutions. Extremely quiet, discreet and provides temperature control in every room – the ultimate in usability. With heating solutions ranging from 25 to 156.5kW.

Go to heat pump sizing tool

Our range of multi room outdoor units

Two ranges of Mitsubishi Electric multi series outdoor units are available: The classic multi range, developed for small to medium-sized homes, and the power multi range, designed specifically for homes or small offices where a wider range of commercial-type indoor units are required. The multi series range from Mitsubishi Electric provide a quiet, highly efficient and flexible air conditioning system for all your heating and cooling needs.

What is multi room