Common questions – What is a Split unit?

Split system refrigeration units are a type of cooling system composed of two main components: an indoor unit and an outdoor unit. These systems are commonly used in residential, commercial, and industrial settings for air conditioning and refrigeration purposes. Let’s break down the key components and functions of split system refrigeration units:
### Components
1. **Indoor Unit:**
   – **Evaporator Coil:** This is where the refrigerant absorbs heat from the indoor air, causing the refrigerant to evaporate into a gas.
   – **Blower/Fan:** Circulates the indoor air over the evaporator coil and then distributes the cooled air throughout the space.
   – **Air Filter:** Removes dust, pollen, and other particulates from the air before it passes over the evaporator coil.
2. **Outdoor Unit:**
   – **Compressor:** Compresses the refrigerant gas, raising its pressure and temperature.
   – **Condenser Coil:** Releases the heat absorbed from the indoor air to the outside environment, causing the refrigerant to condense back into a liquid.
   – **Fan:** Helps to dissipate the heat from the condenser coil to the outside air.
   – **Expansion Valve:** Controls the flow of refrigerant into the evaporator coil, reducing its pressure and temperature.
### How It Works
1. **Refrigerant Cycle:**
   – The refrigerant absorbs heat from the indoor air at the evaporator coil, causing it to evaporate into a gas.
   – The compressor in the outdoor unit compresses the gaseous refrigerant, raising its temperature and pressure.
   – The high-pressure, high-temperature refrigerant moves to the condenser coil, where it releases the absorbed heat to the outside air and condenses back into a liquid.
   – The liquid refrigerant passes through the expansion valve, where its pressure and temperature are reduced before it returns to the evaporator coil to repeat the cycle.
2. **Air Circulation:**
   – The indoor unit’s blower fan pulls warm air from the room and passes it over the evaporator coil.
   – The cooled air is then blown back into the room, lowering the indoor temperature.
### Advantages
– **Efficiency:** Split systems are generally more energy-efficient than traditional window units because they can be tailored to the specific cooling needs of different zones or rooms.
– **Quiet Operation:** The noisiest components (compressor and condenser fan) are located outside, reducing indoor noise levels.
– **Flexibility:** They can be used in various configurations, including single-zone and multi-zone systems, making them suitable for different types of buildings and applications.
– **Aesthetic Appeal:** The indoor units are typically sleek and unobtrusive, blending seamlessly with interior decor.
### Applications
– **Residential:** Homes and apartments, especially those without existing ductwork.
– **Commercial:** Offices, retail spaces, restaurants, and other commercial buildings.
– **Industrial:** Warehouses, cold storage facilities, and manufacturing plants.
### Maintenance
Regular maintenance is essential to ensure the efficient operation and longevity of split system refrigeration units. This includes cleaning or replacing air filters, checking refrigerant levels, inspecting the coils, and ensuring that the outdoor unit is free from debris.
By understanding the components and operation of split system refrigeration units, you can make informed decisions about their installation, use, and maintenance.

Mitsubishi Electric Controllers

A Full list of Mitsubishi Electric Air conditioning controllers. Check it out…

Daikin Update

Brussels, 22.03.2024 – Daikin announces the launch of the next generation ‘All Seasons’ Perfera home air-to-air heat pump, also known as air conditioning. The indoor and outdoor units of the Perfera system have been fully redesigned to enhance the user experience, making them both easy to install, and easy to use. Equally important, the ‘All Seasons’ Perfera provides year-round climate control and clean air with lower energy bills thanks to market leading energy efficiency and performance.

  • Best-in-class energy performance with a seasonal energy efficiency ratio of up to 9.47 and a seasonal coefficient of performance of up to 5.20.
  • A+++ cooling and heating, both in pair and multi*, offers significantly lower running costs
  • Near silent running with sound levels down to 19 dBA
  • Robust performance even in extreme temperatures


* For 6 specific combinations with 3MXM52A9

Perfera All Seasons packshot right

Advanced technology, improved comfort and an elegant design

The stylish Perfera wall-mounted unit is compact and features curved lines to blend subtly with any décor and offers a discreet space-saving solution.

The air flows have been optimised and assure comfort all year long, whether in cooling or heating mode. A new double flap enables the Comfort Plus function, a precise angle which narrows the airflow path, increasing air velocity. This pushes air upwards, redirecting cold air away from room occupants to eliminate draughts and ensure even coverage into corners in winter and summer. A 3D airflow option can be selected which combines vertical and horizontal auto-swing for large spaces.

The 2-area motion detector checks adjacent areas and directs the air away from the inhabitants. When an empty room is detected, it adjusts the system automatically to the energy saving mode.

The new Perfera has a unique Daikin-only Heat Boost function to reach set temperature 14% earlier than conventional systems.

The ‘All Seasons’ Perfera range has been extended to provide additional flexibility in configuration, currently offering six capacities from 15 class up to 50 class. The new 50 class has been developed to fit in the same standard units as smaller capacities, offering the option to incorporate bigger capacities in the same space, building in more flexibility and choice for the end user and installer.


Perfera All Seasons installed in living room for comfortable temperature

Guaranteed low sound levels

A new re-designed indoor unit fan optimises airflow and creates high energy efficiency at practically inaudible sound levels (19 dBA). Combined with the low noise outdoor unit, Perfera delivers perfect peace and quiet for residents and neighbours, making it the ideal solution for urban environments.

A night set mode incorporated into Perfera ensures a comfortable night’s sleep for everyone by reducing room temperatures by 2˚C in the cooler seasons and raising them by 0.5 ˚C in Summer, thus also reducing on energy consumption.

Well connected

The new ‘All-Seasons’ Perfera system has been designed for simplicity of use and convenience. Settings can be changed or scheduled according to preference with the supplied infrared control or via Daikin’s Onecta App. Voice activated control using Google Assistant or Alexa provides immediate, intuitive control over settings and allows users to monitor energy consumption online.

Controlled indoor air quality

Perfera’s powerful air purification capabilities help ensure cleaner air. The integrated Daikin flash streamer technology, titanium apatite deodorising filter and silver allergen filter remove dust, allergens and odours. A new feature in the ‘All Seasons’ Perfera is the washable static filter, treated with an active lonpure substance to capture, reduce and remove bacteria and viruses.

Installer benefits

The next generation Perfera also offers significant advantages for installers. Maximum capacities for classes 20 to 42 have been increased by 20% for cooling and 30% for heating within existing standard dimensions. In addition the air flows have been enhanced. This provides considerably more flexibility in configuration.

A wide range of digital tools is available to assist installers in providing comprehensive lifetime care to their customers.

In 2024, Daikin will introduce Daikin Cloud Service Residential (DCS), the remote monitoring service for the new Perfera systems which is hosted on its existing Stand By Me platform. Installers will be able to benefit from faster analysis and intervention and decide which spare parts would be required to minimise the need for customer home visits, saving time and service costs.

The Daikin Stand By Me platform connects end-users, installers and Daikin. In order to activate remote monitoring, the end user will need to provide a consent to the chosen installer.

Installers have access to vital information on the move with Daikin’s E-care application, which also allows them to order spare parts.


Woman packing suitcase in comfortable temperature because Perfera All Seasons in her bedroom

Cold room Installations

The Ultimate Guide to Coldroom Installation: Ensuring Efficiency and Longevity
In industries like food service, pharmaceuticals, and biotechnology, maintaining an optimal temperature for products is crucial. Coldrooms are essential for ensuring that perishable goods remain fresh and safe for consumption. A well-installed coldroom can significantly enhance operational efficiency and product longevity. This guide will walk you through the key considerations and steps involved in coldroom installation.
1. Understanding Your Needs
Before diving into the installation process, it’s vital to assess your specific requirements. Here are some questions to consider:
– What will be stored in the coldroom?
Different products have different temperature needs.
– What is the volume of goods?** This will determine the size of the coldroom.
– How often will the coldroom be accessed?** High-traffic coldrooms may require additional features like rapid cooling or reinforced doors.
2. Choosing the Right Location
The location of your coldroom is critical for its efficiency and functionality. Here are some factors to consider:
– Proximity to loading areas:** To minimize the time products spend outside of a controlled environment.
– Ventilation:** Ensure there is adequate ventilation to prevent overheating of refrigeration units.
– Structural support:** The floor and walls should be able to support the weight of the coldroom and its contents.
3. Selecting the Coldroom Type
Coldrooms come in various types, including modular coldrooms, walk-in coldrooms, and custom-built coldrooms. Your choice will depend on your specific needs:
– Modular Coldrooms:** These are pre-fabricated and can be easily assembled on-site. They are ideal for businesses that require flexibility and scalability.
– Walk-in Coldrooms:** Suitable for larger operations, walk-in coldrooms offer more space and are often used in restaurants, supermarkets, and warehouses.
– Custom-built Coldrooms:** For unique specifications, custom-built coldrooms provide tailored solutions to meet specific requirements.
4. Insulation and Sealing
Proper insulation is paramount to maintaining the desired temperature and ensuring energy efficiency. Materials like polyurethane foam are commonly used for their excellent insulation properties. Additionally, ensure that all joints and seams are properly sealed to prevent air leaks.
5. Refrigeration System
Choosing the right refrigeration system is critical. Factors to consider include:
– **Cooling capacity:** Ensure the system can handle the volume of the coldroom.
– **Energy efficiency:** Opt for systems with high energy efficiency ratings to reduce operational costs.
– **Reliability and maintenance:** Choose a system with a good track record and easy maintenance access.
6. Flooring
The flooring of your coldroom should be durable, easy to clean, and resistant to moisture and temperature changes. Epoxy resin floors are a popular choice due to their durability and hygienic properties.
7. Lighting
Coldroom lighting should be energy-efficient and designed to operate effectively at low temperatures. LED lights are a common choice due to their low heat emission and long lifespan.
8. Installation Process
The installation process typically involves the following steps:
1. **Site Preparation:** Ensure the site is clean, level, and ready for installation.
2. **Panel Assembly:** The coldroom panels are assembled according to the manufacturer’s instructions. This includes walls, ceiling, and floor panels.
3. **Refrigeration Installation:** Install the refrigeration system, ensuring all components are properly connected and sealed.
4. **Electrical Work:** Connect the electrical systems, including lighting and any monitoring equipment.
5. **Final Sealing and Testing:** Ensure all seams and joints are sealed. Conduct thorough testing to ensure the coldroom maintains the desired temperature.
9. Refrigeration Maintenance and Monitoring
Regular maintenance is essential to ensure the longevity and efficiency of your coldroom. This includes:
– Regular Cleaning:** Keep the interior clean to prevent mold and bacterial growth.
– System Checks:** Regularly check the refrigeration system for any signs of wear or malfunction.
– Temperature Monitoring:** Use monitoring systems to keep track of temperature and humidity levels.



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