The Best Commercial Air Conditioning Systems for Offices
In the UK, summers are getting warmer, which means more office buildings are overheating, especially during heatwaves. High indoor temperatures make it harder for employees to focus and concentrate on their work. That’s why it’s important for businesses to have an adequate office air conditioning system in place.
Chillaire has been installing AC’s in offices for over 30 years. Below we will outline the best air conditioning for offices, including single-room wall-mounted units and full VRF systems spanning multiple floors.
What we cover in this article:
- Why is Office Air Conditioning Important?
- The Best Air Conditioning Systems for Offices
- Which Air Conditioning System is Right for Your Office?
- Which AC Brands Does Chillaire Install for Offices?
Why is Office Air Conditioning Important?
Office air conditioning is not just there to keep employees cool in June, July and August. A well-designed office HVAC system controls temperature in both directions, heating and cooling no matter how many people are in the office or the weather outside.
Air conditioning systems in office buildings are important because:
- Comfortable temperatures help employees stay focused.
- One system can provide heating in winter and cooling in summer.
- Air conditioning filters dust and improves air quality.
- A well-maintained system can help improve your EPC rating.
- Modern AC systems use less energy and lower running costs.
The Best Air Conditioning Systems for Offices
The best office air conditioning system depend on your workspace layout. Unlike residential systems, commercial air conditioning must cope with:
- Higher numbers of occupants throughout the day
- Constant heat from computers, servers and other office equipment
- Large or complex layouts that may need different temperatures in different areas at the same time.
The best air conditioning for offices includes:
Wall-Mounted Split System
Best AC system for: small and medium offices and single rooms.
A wall-mounted split AC system is a single outdoor unit connected to a single indoor wall unit. They are a cost-effective AC solution for small and medium offices as they quietly cool and heat areas without using up a lot of ductwork.
Inverter-driven models provide both heating and cooling and can deliver energy savings of up to 30%. Chillaire installs leading brands including Daikin, Mitsubishi Electric and Fujitsu.
Multi-Split System
Best AC system for: small and medium offices with 2 to 8 rooms.
A multi-split air conditioning system connects one outdoor unit to multiple indoor units, usually between 2 and 8. Each indoor unit can be controlled separately, making it easy to set different temperatures in meeting rooms, private offices and other spaces.
This type of system is more cost-effective than installing several standalone units and takes up less outdoor space. It’s the ideal office air conditioning for small to medium-sized offices with multiple rooms.
VRF System (Variable Refrigerant Flow)
Best AC system for: medium to large moderns offices with multiple working zones
VRF systems are an advanced and scalable office AC solution. A single outdoor unit connects to up to 64 indoor units, each with independent control. VRF systems can simultaneously heat one zone and cool another using heat recovery technology, redirecting warmth from a sunny boardroom to a colder north-facing office.
This process prevents energy waste, especially in large offices with modern open-plan layouts, meeting rooms and communal areas.
Learn more about these three units in our article: What is the difference between Split, Multi-Split and VRF AC systems?
Ceiling Cassette Unit
Best AC system for: open-plan offices with suspended ceilings
A ceiling cassette air conditioning system is installed flush within a suspended ceiling, distributing air evenly in four directions for consistent cooling and heating across large spaces.
It’s ideal for open-plan offices, boardrooms and reception areas where a discreet appearance and even airflow are important. Ceiling cassette units can be installed as part of a multi-split or VRF system.
Ceiling / Ducted System
Best AC system for: aesthetic modern offices and reception areas.
A ceiling-ducted air conditioning system is installed and concealed above a suspended ceiling It distributes air through a ductwork network using ceiling grilles, with no visible indoor units. This type of AC system is suitable for modern offices with a design-led aesthetic, such as client-facing spaces, executive suites and reception areas.
VRF Heat Recovery System
Best AC system for: multi-floor or mixed-orientation offices.
An advanced version of VRF that can heat and cool different zones simultaneously. Surplus heat from areas being cooled is captured and redirected to areas that need warming, rather than being expelled outside. This makes heat recovery VRF one of the most energy-efficient office HVAC systems available as they dramatically reduce energy waste and lower operating costs.
Which Air Conditioning System is Right for Your Office?
The right air conditioning for offices comes down to four factors:
- How large the office is
- How many separate zones need independent control?
- Whether the building has a suspended ceiling
- Overall budget
| Office Type | Recommended System | Why |
| Single room or small office | Wall-mounted split system | Most cost-effective.
Quick to install. Heats and cools. |
| Office with 2–8 separate rooms | Multi-split system | One outdoor unit.
Independent control per room. Less roof/wall space used. |
| Open-plan office floor | Ceiling cassette units on a multi-split or VRF | 360-degree airflow.
No wall space used. Even temperature across the floor. |
| Multi-floor or multi-zone office building | VRF system | Up to 64 indoor units from one outdoor unit. Independent zone control.
Heat recovery option |
| High-spec or client-facing office | Concealed ducted system | No visible units.
Clean ceiling finish. Distributes air evenly through grilles. |
| Server room or IT room within an office | Dedicated split system or close control unit | Separate system for 24/7 reliable cooling independent of the main office system. |
Every office has a different layout, ceiling height, building construction, existing electrical capacity and planning constraints. Chillaire’s engineers carry out a full site survey of your office before recommending a system. Book a free consultation here.
Which AC Brands Does Chillaire Install for Offices?
Chillaire has been designing, installing and maintaining commercial air conditioning systems for offices across the Midlands for over 30 years. We are a Daikin D1 business partner and Mitsubishi Electric accredited installer. This means extended warranties and direct manufacturer support are available on qualifying installations.
For offices, Chillaire regularly installs systems from Daikin, Mitsubishi Electric, Fujitsu, Panasonic, LG and Mitsubishi Heavy Industries. The right brand for your office depends on system size, budget and which manufacturer’s indoor unit range suits the space.
From single offices in Coventry to multi-floor buildings across Birmingham, Leicester, Northampton and Derby, every project starts with a free site survey and no-obligation quotation.
Contact our experts to discuss air conditioning for your office.
