Mitsubishi SRK-ZTX-WA is a premium-class wall-mounted inverter air conditioner and air-to-air heat pump designed for stable heating in winter and efficient cooling in summer. This series combines high capacity, quiet operation and good seasonal efficiency, making it suitable for customers who want a reliable and comfortable solution for everyday use.
Mitsubishi SRK-ZTX-WA – Premium Climate Control Solution
| Heating down to | Cooling down to | Energy class | Function |
|---|---|---|---|
| -25 °C | -15 °C | up to A+++ | Integrated WiFi |
ZTX series heat pumps have been tested in Scandinavia at -35 °C and are designed for operation in heating mode down to -25 °C. The heating reserve at low temperatures is particularly strong — the SRK35ZTX-WA model provides up to 5.0 kW at -15 °C and up to 4.4 kW at -20 °C.
The series uses R32 refrigerant and offers integrated WiFi control, an allergen purification system and the patented M-fin technology in the outdoor unit, which increases heat transfer by approximately 10%. The lowest indoor unit noise level is only 19 dB(A), while the outdoor unit operates from 33 dB(A) in quiet mode.
 |
 |
 |
Main advantages
- Heating down to -25 °C and tested operation in Scandinavia at -35 °C.
- Integrated WiFi module for convenient remote control via smartphone.
- Exceptionally quiet operation — from 19 dB(A) for the indoor unit and from 33 dB(A) for the outdoor unit in quiet mode.
- High seasonal efficiency up to A+++ with SEER up to 9.60 and SCOP up to 5.20.
- Patented M-fin technology increases heat transfer by approximately 10%.
- Strong heating capacity reserve in cold conditions — up to 5.0 kW at -15 °C and 4.4 kW at -20 °C for the SRK35ZTX-WA model.
Which rooms is it suitable for?
Mitsubishi SRK-ZTX-WA is suitable for apartments, bedrooms, children's rooms, studies, living rooms and other small or medium-sized rooms where a high level of comfort, quiet operation and stable heating even on the coldest winter days are important. The smaller models are convenient for compact rooms, while SRK35ZTX-WA offers a larger capacity reserve for more open-plan areas.
Models and main technical data
| Model | Cooling | Heating | Capacity at -15 °C | Capacity at -20 °C | SEER / SCOP | Energy class | Equipment price incl. VAT | Installation cost incl. VAT* |
|---|---|---|---|---|---|---|---|---|
| SRK/SRC20ZTX-WA | 2.0 (0.9–3.5) kW | 2.7 (0.9–7.6) kW | 4.6 kW | 3.9 kW | 9.60 / 5.20 | A+++ | 1890EUR | 450EUR |
| SRK/SRC25ZTX-WA | 2.5 (0.9–3.8) kW | 3.2 (0.9–7.8) kW | 4.8 kW | 4.3 kW | 9.50 / 5.20 | A+++ | 2040EUR | 450EUR |
| SRK/SRC35ZTX-WA | 3.5 (0.9–4.5) kW | 4.3 (0.9–8.0) kW | 5.0 kW | 4.4 kW | 9.50 / 5.10 | A+++ | 2160EUR | 450EUR |
*Installation costs include the outdoor unit bracket, 3 m of connecting refrigerant pipes, 2 m of covering plastic trunking, and the installation costs of the equipment and communications.
All models use R32 refrigerant. The series is designed for operation in cooling mode from -15 to +46 °C and in heating mode from -25 to +24 °C.
Dimensions
20 / 25 / 35 models: indoor unit 920 × 305 × 220 mm (W×H×D), outdoor unit 800(+71) × 640 × 290 mm (W×H×D).
Functions
Integrated WiFi — remote control and more convenient climate control via smartphone.
Allergen Clear System — helps reduce allergen build-up and improve indoor air quality.
Ultra Low mode — exceptionally quiet indoor unit operation from 19 dB(A).
Quiet outdoor unit mode — only 33 dB(A) for a lower outdoor noise level.
M-fin heat exchanger — patented technology with approximately 10% better heat transfer.
R32 refrigerant — lower global warming potential and high energy efficiency.
High capacity reserve in cold conditions — suitable for more stable heating at low outdoor temperatures.
Quick summary
The SRK-ZTX-WA series is a good choice for customers looking for a premium-class unit with very quiet operation, integrated control and a strong heating reserve for colder days.