Air conditioning for heating and cooling
The MSZ-RZ wall-mounted unit with R290 (propane) refrigerant
Blog article 17.06.2026The MSZ-RZ wall-mounted unit from Mitsubishi Electric offers an efficient solution for heating and cooling. With its built-in Hyper-Heating function, it delivers consistent heating performance even at outdoor temperatures as low as −25 °C—ideal as a standalone heating solution or to supplement existing systems.
The air conditioner uses propane (R290) as its refrigerant, which is particularly environmentally friendly and future-proof. Thanks to its compact size and a minimum room size of 10 m², the unit can be flexibly installed in almost any room.
- Stiftung Warentest: GOOD (2.0) 🏆
(MSZ-RZ25VU + MUZ-RZ25VUHZ) - High Efficiency & Heating Capacity
- Refrigerant R290
- Low global warming potential
MSZ-RZ - Winner in Stiftung Warentest
Top Pick
In the latest evaluation by Stiftung Warentest, the Mitsubishi Electric air conditioner using R290 refrigerant emerged as the top-rated model in its category (cooling capacity approx. 2.5 kW). The MSZ-RZ25VU + MUZ-RZ25VUHZ from the M Series impressed in many areas—particularly in terms of heating performance, energy efficiency, and environmental characteristics. As one of only two units tested that use R290 refrigerant, it also stands out for its exceptionally low global warming potential.
Highly Efficient Operation—All Year Round
Hyper HeatingHyper Heating for Reliable Heat
Thanks to the combination of state-of-the-art technologies, this split air conditioner achieves top-tier energy efficiency ratings of up to A+++ and stands out for its exceptionally user-friendly operation. The built-in Hyper-Heating function ensures consistent heating performance down to -25 °C and is capable of heating down to an operating limit of -30 °C.
The robust outdoor unit not only provides pleasant cooling in the summer, but is also equipped with a sump heater that ensures reliable performance even in extreme winter temperatures. In addition, the sound pressure level of the outdoor unit can be reduced to below 55 dB in two stages in Low-Noise Mode—ideal for noise-sensitive locations in densely built-up areas.
Technically speaking, a split-system air conditioner is an air-to-air heat pump—it cools the room by releasing heat to the outside. In heating mode, it works the other way around.
Refrigerant R290 (propane)
R290 (propane)– environmentally friendly and eligible for funding
The air conditioner uses the refrigerant R290 (propane). It has a global warming potential of 0.02, thereby supporting the goal of reducing direct greenhouse gas emissions from refrigerants.
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Features for an even more comfortable atmosphere
Comfortable EnvironmentNo drafts, innovative filters, smart controls
To create a noticeably comfortable indoor climate, the air conditioner is equipped with innovative features. The 3D i-see sensor detects people in the room and automatically adjusts the airflow and temperature, thereby preventing drafts. In addition, the Double-Vane function directs the airflow specifically in different directions, ensuring a uniform temperature throughout the room. The Plasma Quad Plus filter, included as standard, efficiently neutralizes bacteria, viruses, mold, allergens, dust, and even odors.
Visually, the white housing with its elegant, matte finish blends discreetly into any interior. Thanks to the built-in MELCloud Wi-Fi adapter, the air conditioner can be conveniently controlled via smartphone or tablet—whether at home or on the go. Alternatively, all settings, timer functions, and automatic programs can be adjusted using the included infrared remote control. The remote control’s display is backlit, making it easy to read even in the dark.
Not without my specialized contractor
Specialized Company
Professional Planning, Installation, and Maintenance
To ensure that your MSZ-RZ air conditioner operates at peak performance and efficiency, proper planning, installation, and regular maintenance are essential. A certified specialist company will ensure that the unit is optimally tailored to your needs and meets all technical requirements. With professional installation and regular maintenance, your air conditioner will always remain high-performing and energy-efficient—ensuring long-lasting, reliable operation and maximum comfort all year round.
Highlights
HighlightsBenefits at a Glance
- Split-system with R290 refrigerant
- High energy efficiency—up to A+++
- Small Minimum Room Sizes
- 3D i-see Sensor: No Drafts
- Air Filters: Plasma Quad Plus Filter and Plasma Odor Filter
- Efficient air distribution throughout the room thanks to the double-vane function
- Controllable via the MELCloud Home app
- Infrared remote control with weekly timer function and backlit display
- Two-stage low-noise mode
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