Commercial Air Conditioning: Costs, Lead Times, and Building Tips

Air conditioning plays an important role in maintaining a pleasant and welcoming environment within commercial spaces. When choosing air conditioning for your commercial space, there are a range of factors to consider, including cost, existing building features, functionality, and aesthetic preferences.

At MFM, we supply a wide range of businesses with industry-leading electrical and mechanical services across Bristol and the South West – including air conditioning systems. Our experienced team assist with selecting, installing, maintaining and servicing systems for commercial spaces.

In this blog, we provide an informative guide for those looking into commercial air conditioning for their business space. We will outline some main system types, their pros and cons, and some other key decision-making considerations.

A Comparison of Popular Commercial Air Conditioning Systems

Split Systems

Split systems are some of the most commonly used commercial air conditioning solutions – consisting of an outdoor compressing/condensing unit and an indoor evaporator and fan, cooling spaces by transferring heat from indoors to outdoors.

Split systems are often appealing for small to medium-sized businesses, with the outdoor positioning of their compressors making for reduced noise disruption. The structure being duct-free also makes for straightforward installation and reduced leaks/thermal loss – making it an appealing, cost-effective option.

Multi-Split Systems

As is suggested by the name, multi split systems operate similarly to single-split systems, yet pose the option of multiple indoor units while still only requiring one outdoor unit. Naturally, multi-split systems can be more complex to install than their singular counterpart.

Both split and multi-split air conditioning systems offer energy efficiency benefits through their limited waste, largely low run speeds and steady temperatures. These systems also offer the additional advantage of tailored heating across a building’s different areas – meaning less energy is used heating spaces that aren’t in use.

VRF/VRV Systems

VRF (Variable Refrigerant Flow) or VRV (Variable Refrigerant Volume) systems use refrigerant to heat and cool multiple zones within a given building. These systems commonly use one outdoor unit connected to several indoor units, all of which can be supplied with a different amount of refrigerant to cater to the specific heating and cooling needs of each space.

These systems offer an energy efficient method of heating and cooling that reduces wasted energy and lowers running costs. VRF systems are, however commonly associated with a larger number of up-front costs, due to the complexity of their installation, which could mean a while before you start seeing a return on your investment.

Chillers

Chillers cool spaces by extracting heat from water using a refrigeration cycle – this cold liquid, in turn, cools a given space. Typically, chillers consist of 5 elements – the chiller unit itself, a compressor, evaporator, condenser, and air handling units (AHUs).

Chillers are often regarded for their efficiency when used in large commercial buildings, and while the complexity of this multi-part system can also make it time-consuming and labour-intensive to install, our expert engineers ensure an efficient, low-disruption experience for your business and customers.

Learn more about chillers and their role in commercial air conditioning >

Commercial Air Conditioning Installation: Budgeting and Timelines

When researching which air conditioning model is best suited to your project, there are several budgeting factors to consider, such as how much you can spend on purchasing, installing and maintaining your system – and the timelines that may be attached to whichever systems you choose.

Things to factor into your budget and estimated timelines include:

• The time and cost spent sourcing and delivering parts
• The time and cost attached to applying for and securing planning permission
• The time and cost of installing the system, which may be increase for complex systems with multiple parts

It will also be useful to seek guidance on what maintenance might be required for a particular system, with some systems requiring more regular maintenance than others, or greater repair costs if certain parts become worn – both of which are also useful to consider for the long term when in your early budgeting stages.

Get a bespoke quote to match your budget and needs – speak to a member of the team today.

Typical AC Solutions by Building Type

The air conditioning system best suited to a commercial space will also be influenced by building type. Factors such as what it is used for, how many occupants it holds, size and layout can all impact what solution is best suited.

Small offices – Common choices include multi-systems and VRF models – allowing for tailored conditions to fit the needs of each room.

Retail Spaces – Split systems offer appropriate solutions for small shops, while VRF systems may offer a useful solution for larger spaces.

Medium or Large Offices – Again, this larger space may benefit from a VRF system, depending on its layout, especially in its offering precise temperature control for individual spaces.

Warehouses & Distribution Centres – Coolers may offer an appropriate solution for these larger spaces, where precisely tailored cooling isn’t required. In these larger spaces, frequently opened shutters or doors may render other air conditioning models inefficient.

Learn more about how to choose the right air conditioning system for your building >

AC Access and Noise Considerations

Ease of access is also essential when installing a commercial air conditioning system – if a system’s elements are difficult to access, this can lead to challenges in the event of a system (or any of its parts) needing repair – or even routine maintenance!

Depending on what your commercial space is used for, it may also be important to consider how much noise different air conditioning systems produce. Systems with greater cooling capacities tend to make more noise, especially if they have larger compressors and fans, resulting in more airflow and vibrations. Noise can also be a factor noted by building regulations centred around air conditioning, so it is important not to overlook this.

Common Commercial AC Mistakes to Avoid

Building Regulations and Planning Permission

It is important to carefully research the planning permission required for some air conditioning systems. In 2025, the main aspects of current UK regulations that impact air conditioning relate to ventilation and energy efficiency. Ventilation regulations work to maintain indoor air quality in commercial spaces, while energy efficiency regulations work to ensure that systems being newly installed meet performance criteria in areas such as insulation, system controls, and power usage.

It should also be noted that there can be regional variation within regulations governing air conditioning, so it is essential to check whether your plans, fit the bill. MFM are industry specialists working across the Bristol area – contact us for support on your commercial air conditioning plans.

Missed Heritage Considerations

If your commercial business operates within a building with heritage significance or has heritage features, planning requirements may be impacted - both in whether planning permission is needed for your air conditioning system, and what applying for it will require. If a heritage asset is likely to be impacted by the installation or operation of a system, it is likely that an assessment will be needed.

Incorrect Sizing

When selecting the right air conditioning system for your commercial space, it is important to carefully consider how the size of your system matches the demand for cooling within your space. If a system is too big, energy may be wasted unnecessarily; if a unit is too small, there may be recurring issues whereby cooling demand cannot be fulfilled.

Commercial Air Conditioning Specialists at MFM

With so much to consider, selecting the right commercial air conditioning for your space can be challenging. Whether it’s choosing the right air conditioning product for your commercial building, or ensuring it meets industry regulations, our Bristol based team are on hand with specialist knowledge and experience working across a range of business sectors. If you’re unsure about what air conditioning solution is right for your business, contact our team to arrange a site survey.

At MFM, we specialise in the installation, servicing and maintenance of a range of mechanical and electrical automated controls and energy management systems. Our fully certified engineers are on call 24 hours a day, year-round, making sure that your air conditioning stays functioning at all times.

To speak with a member of our team and find out how MFM could support you, contact us today.

Read our air conditioning maintenance checklist >

Learn how to choose the best air conditioning unit for your business >

Check out our top tips on choosing an air conditioning company >