About the SRC25ZSX-W
The Mitsubishi Heavy Industries SRC25ZSX-W is the outdoor condenser unit for the premium Diamond Series of split air conditioning systems. As the powerful heart of your climate control solution, this unit is engineered to deliver exceptional performance, outstanding energy efficiency, and whisper-quiet operation for both residential and light commercial properties across the UK.
Engineered for superior performance, the SRC25ZSX-W provides a nominal cooling capacity of 2.5kW and a robust heating capacity of 3.2kW, making it ideal for managing the climate in single rooms, small offices, or studio apartments throughout the year. Its advanced inverter technology intelligently adjusts compressor speed to match the exact cooling or heating demand. This eliminates the inefficient stop-start cycles of older systems, resulting in significantly lower energy consumption, reduced running costs, and a more stable, comfortable indoor temperature without fluctuations. When paired with a compatible indoor unit, the system can achieve a top-tier A+++ seasonal efficiency rating for both cooling and heating, with a high EER of 5.68.
Reflecting a commitment to environmental responsibility, the SRC25ZSX-W operates on R32 refrigerant. R32 is the next generation of refrigerant, possessing a Global Warming Potential (GWP) that is nearly 70% lower than the previously common R410A. By choosing a system that uses R32, you are actively reducing the potential impact of your air conditioning on climate change, contributing to a greener future without compromising on performance.
The Diamond Series is renowned for its quiet operation, and the SRC25ZSX-W is no exception. With a sound pressure level of just 44 dB(A) during cooling mode, the unit operates discreetly in the background. This low noise output is crucial for residential settings, particularly in densely populated areas or for properties with limited outdoor space, ensuring that neither you nor your neighbours are disturbed.
The SRC25ZSX-W is designed with both aesthetics and practicality in mind. Its modern, sleek casing and compact dimensions (641mm x 800mm x 290mm) allow for an unobtrusive installation on a wall, roof, or at ground level. The durable construction is built to withstand the varied British weather, ensuring long-term reliability and performance.
Installation flexibility is a key feature of this unit. It supports a generous maximum pipe run of up to 25 metres and a significant vertical height difference of 15 metres between the indoor and outdoor units. This versatility allows for a wide range of installation scenarios, easily accommodating different building layouts, from a simple back-to-back setup in a bungalow to more complex installations in multi-storey homes or commercial premises like shops and restaurants.
This outdoor unit forms a complete system when combined with a compatible indoor model from the MHI SRK-ZSX Diamond range, such as the SRK25ZSX-WF (Pure White), SRK25ZSX-WFB (Black & White), or SRK25ZSX-WFT (Titanium). When paired, the system unlocks a host of user-friendly features including Wi-Fi control via the Smart M-Air app, advanced allergen-clear filters, motion sensors for enhanced energy saving, and fully customisable timers.
Please note that the SRC25ZSX-W is a component of a split air conditioning system and contains fluorinated greenhouse gases (F-gases). UK regulations mandate that any such system must be installed and commissioned by a qualified, F-Gas certified engineer. Professional installation is essential for safety, compliance with the law, optimal performance, and the validation of the manufacturer's warranty.
Applications
- Bedrooms and living rooms
- Home offices and garden rooms
- Small retail boutiques and cafes
- Individual offices and meeting rooms
- Server rooms or IT closets
- Galleries and studios
Installation guidance
- Must be installed by an F-Gas certified engineer to comply with UK law.
- Designed for pairing with a compatible MHI SRK-ZSX series indoor unit.
- Requires a dedicated 230V/1ph/50Hz power supply.
- Supports a maximum pipe length of 25 metres between indoor and outdoor units.
- Allows a maximum vertical height difference of 15 metres.
- Unit location must provide sufficient clearance for airflow and maintenance.
- Additional refrigerant (20g/m) is required for pipe lengths over 15m.
- Connects via 1/4" liquid and 3/8" suction refrigerant pipes.
Frequently asked questions
Is this a complete air conditioning system?
No, the SRC25ZSX-W is the outdoor unit only. It must be paired with a compatible Mitsubishi Heavy Industries SRK-ZSX series indoor unit to function as a complete split system.
What refrigerant does this unit use?
This unit uses R32 refrigerant, which has a lower Global Warming Potential (GWP) than older refrigerants like R410A, making it a more environmentally considerate choice.
How noisy is the SRC25ZSX-W?
The unit has a low sound pressure level of 44 dB(A) during cooling operation, which is very quiet for an outdoor condenser, minimising disturbance to you and your neighbours.
Do I need a professional to install this?
Yes, absolutely. In the UK, it is a legal requirement that any air conditioning system containing F-Gas refrigerants be installed and commissioned by a qualified and certified F-Gas engineer. This is also necessary to validate the manufacturer's warranty.
