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Mitsubishi Electric
MSZ-RZ
Mitsubishi Electric MSZ-RZ35VU wall-mounted air conditioner from the Hyper Heating series: heating in frost down to -30 °C, A+++ class and R290 refrigerant with a GWP of 0.02.
- Wi-Fi
- White
- Heating function
- Japanese technology
- Low noise
- Cooling capacity
- 3.5kW
- Indoor unit noise
- from19dB(A)
- Heats in outdoor frost
- down to−30°C
Price incl. installation
Price on request
What installation includes
- Installation of the indoor and outdoor unit
- Up to a few metres of refrigerant, electrical and condensate routing
- Wall penetration and neat routing of the installation
- Carrying out the vacuum and checking the system for tightness
- Charging with refrigerant and starting the unit up
- Checking the operating parameters and configuring the controls
- Operating instruction and handover of the warranty documents
The Mitsubishi Electric MSZ-RZ35VU, paired with the MUZ-RZ35VUHZ outdoor unit, is a wall-mounted air conditioner from the Hyper Heating series, built around one idea: it should keep heating even when it is well below zero outside. The manufacturer states constant heating output down to -30 °C, and the permitted operating range in heating mode runs from -30 °C to 24 °C. Nominal capacity is 3.5 kW in cooling and 4.0 kW in heating, and in heating the unit can drop its output to 1.1 kW or raise it to 7.0 kW. That reserve matters on days when the temperature falls sharply and a room has to be warmed up quickly.
The second strength of this model is its R290 refrigerant, which is propane, with a global warming potential (GWP) of 0.02. That is a very low figure, which is why the MSZ-RZ appeals to people who also look at the climate footprint of the equipment they buy. Seasonal ratings add to the picture: SEER 9.6 and SCOP 5.2, both in the A+++ class. Propane is flammable, so we agree the installation rules for your specific flat during the assessment, before we plan any work.
The indoor unit has a white body with a matte surface and runs quietly: its sound pressure level starts at 19 dB(A) and reaches 36 dB(A) at the upper end. The 3D i-see sensor, the Plasma Quad Plus filter and the Double Vane function look after comfort and air quality, and the built-in MELCloud adapter lets you control the unit over WiFi. The manufacturer describes the air conditioner as a stand-alone heat source or a supplement to existing heating. We quote the installed price after a free assessment.
Overview and positioning
In Mitsubishi Electric's range, the MSZ-RZ is the wall-mounted Hyper Heating line, where heating at low outdoor temperatures plays the leading role. The number 35 points to the variant with 3.5 kW of cooling capacity. The indoor unit carries the code MSZ-RZ35VU and the outdoor unit MUZ-RZ35VUHZ. Every figure we quote here comes from the manufacturer's leaflet, so you can check it against the documentation. The data covers the 3.5 kW variant; the series includes other capacities, which we do not describe here so as not to mix parameters of different units.
In practice this is not a classic cooling unit with heating added on. The heating operating range reaches -30 °C, while cooling covers outdoor temperatures from -10 °C to 50 °C. The heating capacity of 4.0 kW is higher than the cooling capacity of 3.5 kW, and the upper modulation limit of 7.0 kW gives a reserve for days when conditions change fast. The lower limit of 1.1 kW lets the unit hold the temperature calmly once the room is already warm.
The manufacturer points to two ways of using it: as a stand-alone heating solution or as a supplement to existing heating systems. For a flat in Warsaw that might mean topping up the living room in spring and autumn, when central heating is not yet switched on or cannot keep up with changes in the weather. In summer the same unit cools the room with a capacity of up to 4.0 kW.
Cooling and heating technology
The air conditioner uses inverter technology, so its output changes smoothly. In cooling it ranges from 1.0 to 4.0 kW (nominal 3.5 kW), and in heating from 1.1 to 7.0 kW (nominal 4.0 kW). Such a wide range lets the unit follow the actual needs of the room instead of switching on and off all the time, which supports a stable room temperature. Smooth operation also means fewer abrupt changes in airflow, which can be felt as a draught.
The core of the series is Hyper Heating technology. According to the manufacturer it delivers constant heating output at low outdoor temperatures, down to -30 °C. The seasonal SCOP is 5.2, in the A+++ class; in cooling the SEER reaches 9.6, also A+++. The higher the SCOP, the more heat the unit delivers from each unit of electricity it uses, so over a long heating season this translates directly into running costs.
The R290 refrigerant is propane, and its GWP is 0.02, which is practically nothing in terms of climate impact. Propane is flammable, however, so with this model we discuss the placement of the units and the pipe route with the customer with particular care. We settle the rules and scope of work at the free assessment, before installation starts. That way the customer knows from the outset where the outdoor unit will stand, where the pipes will run and how the unit will fit with the rest of the flat, and we avoid changes in the middle of the work.
Comfort and air quality
Quietness is one of the strong points indoors. The manufacturer gives the sound pressure level of the indoor unit as 19 dB(A) to 36 dB(A) in heating, and adds a Low-Noise mode in two levels. At the lowest level the unit is easy to overlook at night, which suits a bedroom. The outdoor unit is rated 49 dB(A) in cooling, so when choosing a spot on the facade or balcony it is worth considering neighbouring windows.
The 3D i-see sensor detects people in the room and automatically adjusts the airflow direction and the temperature. The Double Vane function splits the airflow horizontally and vertically, so cool or warm air can be aimed where it is needed rather than straight at the occupants. This is especially useful in a small room, where the distance from the outlet to the bed or desk is short.
Air quality is handled by the Plasma Quad Plus filter, fitted as standard. According to the manufacturer it neutralises bacteria, viruses, mould, allergens and other pollutants. A Plasma odour filter complements it. Like any air conditioner, this one needs regular filter cleaning and periodic servicing, because that decides whether the air in the room stays fresh. It matters most in the heating season, when the unit runs for many hours every day with the windows closed. Cleaning the filters is simple and takes a few minutes, and we show it when we hand over the unit.
Controls and Wi-Fi
In the MSZ-RZ the MELCloud WiFi adapter is integrated at the factory, so there is no module to buy separately. Once connected to your home network, you control the unit from a smartphone or tablet, including when you are away. This is handy when you are coming back to a cold flat and want to warm it before you walk in, or when you switch on cooling an hour before getting home on a hot day.
The set includes an infrared remote with a weekly timer and a backlit display. The weekly timer lets you plan operation for individual days, for example a lower temperature while nobody is home and a higher one in the afternoon. The backlit screen makes the remote easy to use in the evening without switching on the room light.
Automatic functions add to this: the 3D i-see sensor reacts to people on its own, and the two-level Low-Noise mode reduces noise on request. Daily use then comes down to setting the temperature and a schedule. At start-up we configure the controls together with the customer so that from day one they know how to use them. If several people live in the home, it is worth agreeing one shared day and night setting, and keeping the remote as a backup in case the WiFi is briefly unavailable. The adapter works through your home router, so during installation we check the signal strength where the indoor unit will hang.
Design and build
The indoor unit is white, and its surface has a matte finish that does not draw attention and fits easily into bright interiors. The lack of gloss means fewer visible fingerprints and fewer reflections from window light. The manufacturer describes the casing as compact, which the dimensions confirm: 998 mm wide, 247 mm deep and 305 mm high.
The indoor unit weighs 14.4 kg. With such parameters, mounting on a wall above a door, above a sofa or in an alcove needs no special solutions, as long as the wall is load-bearing and allows a secure fixing. During the assessment we check how the shape of the room affects free airflow, because that determines how well Double Vane and 3D i-see work.
The MUZ-RZ35VUHZ outdoor unit is also described by the manufacturer as compact. For a flat owner this means an easier choice of place on a balcony or facade, but we always verify the location on site, taking into account the building's owners' association or housing cooperative and any rules on the appearance of the building. It is also worth ensuring access to the outdoor unit for servicing, because a unit hidden where nobody can reach it makes later maintenance harder. During the assessment we propose several possible places and choose together the one that combines good access, a short pipe route and the look of the facade. The white indoor body goes well with light walls and furniture, and the matte texture stays unobtrusive even when the unit hangs directly opposite the room entrance.
Installation and service
As part of the installation we mount the indoor and outdoor units, running up to a few metres of refrigerant, electrical and condensate lines. We make the wall passage and route the installation so that it looks tidy. Then we evacuate the system and check it for leaks, fill it with refrigerant and start the air conditioner.
After start-up we check the operating parameters, configure the controls and show you how to use the remote and the app. Finally we hand over the warranty documents. The maximum installation length for this model is 20 m, so before accepting the job we measure the actual route between the units.
Some items may carry a surcharge, and we discuss them before the work: a longer route, drilling through concrete or reinforced concrete, chasing walls, a condensate pump or work from a lift platform. We settle the scope at the free assessment. With R290 we also talk about the fact that propane is flammable and adapt the way we install to the location. After that it is enough to clean the filters and book a periodic service. We quote the installed price after a free assessment. Customers often ask how long the whole process takes. It depends on the installation route and the type of wall, so after the assessment you get a description of the scope from us, listing everything that is part of the installation and, separately, anything that may need a surcharge. That way there are no surprises on the day of the work. We recommend a service once a year, and if you have questions about operation you can come back to us after the installation as well.
Who this model is for — summary
The MSZ-RZ35VU is for people who care above all about heating in frost. If in winter you want a working heat source even at temperatures around -30 °C, this is exactly the kind of operation the series is made for. The manufacturer speaks of constant heating output across that whole range, and a SCOP of 5.2 in the A+++ class points to high seasonal efficiency.
It is also a good choice for customers who pay attention to the low climate impact of the refrigerant. R290 with a GWP of 0.02 suits people who understand that propane calls for a more careful approach to installation. The model works as stand-alone heating or as a supplement to an existing system, for example in a flat where central heating does not give full control over temperature.
If you do not need operation at such low temperatures and only want cooling in summer, this model probably exceeds your requirements. If, on the other hand, quietness from 19 dB(A), Plasma Quad Plus filtration, standard WiFi and an elegant white, matte body matter to you, the MSZ-RZ35VU does very well. Ask for a free assessment and we will match a solution to your room. During the visit we will measure the room, check possible places for both units and say openly whether this model makes sense in your case or whether another from our range suits you better. The decision to buy is yours, and we help you make it on the basis of the manufacturer's figures.
Technical data
Specifications
| Model (indoor / outdoor unit) | MSZ-RZ35VU / MUZ-RZ35VUHZ |
|---|---|
| Cooling capacity (nom.) | 3.5 kW (range 1.0–4.0 kW) |
| Heating capacity (nom.) | 4.0 kW (range 1.1–7.0 kW) |
| SEER (cooling) | 9.6 — class A+++ |
| SCOP (heating) | 5.2 — class A+++ |
| Refrigerant | R290 |
| Noise level (indoor, min.–max.) | 19–36 dB(A) |
| Noise level (outdoor) | 49 dB(A) |
| Indoor unit dimensions (W/D/H) | 998/247/305 mm |
| Indoor unit weight | 14.4 kg |
| Operating range (cooling, outdoor) | -10°C to +50°C |
| Operating range (heating, outdoor) | -30°C to +24°C |
| Max. pipe length | 20 m |
Questions
Frequently asked questions
Does the MSZ-RZ35VU heat in hard frost?
Yes, that is its main job. The manufacturer states constant heating output with Hyper Heating technology down to -30 °C, and the operating range in heating is from -30 °C to 24 °C. Nominal heating capacity is 4.0 kW, with modulation from 1.1 to 7.0 kW.
How loud are the indoor and outdoor units?
The indoor unit has a sound pressure level of 19 dB(A) to 36 dB(A) in heating, plus a Low-Noise mode in two levels. The outdoor unit is rated 49 dB(A) in cooling.
Do I have to buy WiFi separately?
No. The MELCloud WiFi adapter is built in as standard, so once connected to your home network you can control the air conditioner from a smartphone or tablet. The set also includes an infrared remote with a weekly timer.
What are the indoor unit dimensions and the maximum installation length?
The indoor unit is 998 mm wide, 247 mm deep and 305 mm high, and weighs 14.4 kg. The maximum installation length is 20 m; we measure the actual route at the free assessment.
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