Are you still stuck trying to choose the right air conditioning system for your home or business? Before you head out and buy the first unit you set your eyes upon, there are a number of important factors to consider. Getting the right system means getting the most out of your investment — and making sure it's energy and cost efficient from day one.
It's All About The Size (Of Your Room)
Possibly the most important factor when choosing a new air conditioning system is matching the unit to the size of the room. If you pick a unit that's too small, you'll barely notice a difference in temperature — it's essentially money wasted. If the unit is too large, it will constantly cycle on and off trying to regulate the room temperature, wasting energy and putting unnecessary strain on the system.
As a general rule, calculate the room's square footage and match it to the unit's BTU (British Thermal Unit) rating. When in doubt, consult a qualified HVAC installer who can carry out a proper heat load calculation.
Fan Speed and Airflow Control
The fan speed in your air conditioning system should be easily adjustable, giving you control over how much conditioned air circulates around the room. A higher fan speed will cool a hot room down faster, while a lower, quieter setting is ideal for overnight use. Look for units with at least three fan speed settings as a minimum.
Remote Control and Smart Features
Modern air conditioning systems offer a wide range of controls — from basic infrared remotes to Wi-Fi enabled smart thermostats that can be controlled via an app. Some models include energy-saving modes that automatically adjust output based on room temperature, which can make a meaningful difference to your running costs over time. If you're installing in a commercial setting, programmable timers and zone control are worth prioritising.
The Main Types of Air Conditioning System Available in the UK
The right system for you depends on your property type, budget, and how you intend to use it. Here's a breakdown of the main options:
Split Air Conditioning Systems
The most common type on the market. A split system consists of a wall-mounted indoor unit connected to an outdoor compressor unit. You'll recognise the outdoor unit from warmer countries — it's the box mounted on an external wall. Split systems are suitable for most homes and businesses and are the go-to choice for professional HVAC installers.
- Energy efficient
- Provides both cooling and heating
- Relatively straightforward to install
Central Air Conditioning Systems
Central systems distribute conditioned air through ductwork installed throughout the building. They're more commonly found in new builds, where ducts can be incorporated during construction. Retrofitting ductwork into an older property is possible but more disruptive and costly.
- Ideal for new builds
- Energy efficient at scale
- Quiet operation
Portable Air Conditioners
Portable units are a practical solution for smaller rooms or situations where a fixed installation isn't possible — for example, rented properties or temporary spaces. They're self-contained, easy to move between rooms, and require no permanent installation. Our DiversiTech PAC-C-12-R290 Portable Air Conditioner (12,000 BTU) is a good example — compact, efficient, and uses the low-GWP R290 refrigerant.
- No installation required
- Easy to relocate
- Good option for renters or temporary use
- Lower upfront cost than fixed systems
Final Thoughts
Choosing the right air conditioning system comes down to room size, usage requirements, and budget. If you're unsure, speak to a qualified installer before committing. And once your system is in place, make sure you keep up with regular servicing — filters, refrigerant levels, and coil cleaning all affect efficiency and lifespan.
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