For most UK businesses, air conditioning is one of the largest single line items on the energy bill — and in the middle of summer, that cost climbs sharply. With commercial electricity prices still well above historic levels, the difference between a well-managed system and a neglected one can run into thousands of pounds a year for a single site.
The good news is that cutting those costs rarely means switching the cooling off and making staff or customers uncomfortable. In most buildings, 15–30% of air conditioning energy is simply wasted — lost to poor controls, dirty equipment, and oversized or outdated systems. At AKS Air Conditioning, we have spent over 34 years helping commercial clients across the North West run cooler buildings on lower bills. Here is where the savings actually come from.
Where Your Air Conditioning Energy Actually Goes
Before spending money on upgrades, it helps to understand the main drivers of running cost. In a typical commercial installation, energy waste tends to cluster in a few predictable places:
- Poor control and scheduling — units running overnight, at weekends, or in empty zones.
- Dirty filters and coils — a clogged system works harder to move the same air, drawing more power for less cooling.
- Incorrect setpoints — cooling to 19°C when 23–24°C would keep occupants perfectly comfortable.
- Heating and cooling fighting each other — one zone calling for heat while the next calls for cooling.
- Old, inefficient equipment — fixed-speed systems that run flat out rather than modulating to demand.
Quick Wins: Savings That Cost Little or Nothing
1. Get your setpoints right
Every 1°C of unnecessary cooling can add roughly 8–10% to the running cost of that unit. Setting a sensible summer target of 23–24°C, with a dead band so heating and cooling never overlap, is the single cheapest saving available to most businesses.
2. Schedule around occupancy
Air conditioning should follow the working day, not run 24/7. Time clocks, occupancy sensors, and zoning ensure you are only cooling space that is actually in use. For sites with variable footfall — retail units, restaurants, gyms — smart controls pay for themselves quickly.
3. Keep filters and coils clean
A blocked filter is one of the most common and most expensive faults we find. Restricted airflow forces the compressor to work harder, raising consumption while reducing cooling output. Regular cleaning is a core part of any planned maintenance visit — and it directly protects your energy bill.
The Bigger Lever: Maintenance and Efficiency
A well-maintained system does not just break down less — it costs measurably less to run. Refrigerant levels, coil condition, fan performance, and control calibration all drift over time, and a system running slightly out of spec quietly burns extra electricity every hour it operates.
Planned preventative maintenance is the most reliable way to hold efficiency at its design level year after year. It also keeps you compliant with F-Gas leak-checking duties, which carry both environmental and financial penalties when ignored. You can read more on our approach to commercial air conditioning maintenance and on staying within the rules on our compliance page.
| Action | Typical cost | Typical impact on running cost |
|---|---|---|
| Optimise setpoints and dead band | None | 8–15% saving |
| Occupancy-based scheduling / controls | Low | 10–20% saving |
| Planned maintenance contract | Low–medium | 5–15% saving + fewer breakdowns |
| Upgrade to inverter / VRV system | Higher (capital) | 20–40% saving vs. old fixed-speed kit |
When Replacement Beats Repair
If your equipment is more than 12–15 years old, the maths often favours replacement over continued repair. Modern inverter-driven systems from manufacturers such as Daikin and Mitsubishi — both of whom we partner with — modulate their output to match demand, rather than switching fully on and off. The result is dramatically lower energy use, quieter operation, and far better comfort control.
Older R22 and some R410A systems also face refrigerant and regulatory pressures, making spare parts and servicing more costly over time. A modern VRV/VRF replacement using lower-impact refrigerant typically delivers a payback period that surprises clients once the energy and reliability savings are added up.
Don’t forget ventilation and air quality
Cooling and fresh-air supply are closely linked. A building that relies on opening windows for ventilation loses conditioned air constantly. Properly designed mechanical ventilation with heat recovery (MVHR) brings in fresh air while recovering energy from the air being extracted — improving both comfort and efficiency. See our work on ventilation for how this fits alongside cooling.
A Practical Plan for the Next 12 Months
You don’t need to do everything at once. A sensible sequence for most commercial sites looks like this:
- Now: review setpoints and schedules, and book a maintenance visit to clean filters and check refrigerant charge before peak summer load.
- Next quarter: add smart controls or zoning where occupancy varies.
- Within the year: get a survey on any equipment over 12 years old to model the payback of an inverter or VRV upgrade.
Each step stands on its own and starts saving immediately — you are never locked into a big capital decision before you see results from the cheaper wins.
Talk to the Commercial Cooling Experts
With more than 34 years of experience and accredited partnerships with Daikin and Mitsubishi, AKS Air Conditioning helps businesses across Liverpool, Manchester, the Wirral and the wider North West cut their cooling costs without compromising on comfort or compliance. We will survey your site, identify exactly where energy is being wasted, and give you a clear, costed plan.
Call our team today on 01704 833 755 or get in touch via our contact page to arrange an energy and efficiency review of your air conditioning.
