Efficient heating, ventilation and air conditioning (HVAC) systems are essential for commercial and industrial buildings - yet outdated or poorly maintained systems are often a major source of hidden energy waste and unexpected costs.
If your HVAC system is older, hasn't been serviced in a while, or doesn't perform as it used to, it might be costing you more than you realise. Here's what to watch for - and how UES can help you stay efficient, compliant, and cost-effective.
The hidden cost of inefficiency
Because commercial HVAC systems tend to run in the background, they're often overlooked. But even small inefficiencies, like misconfigured controls or neglected maintenance, can greatly impact energy consumption.
We regularly come across systems running outside of building hours, uneven temperatures due to outdated zoning, or air handling units that haven't been serviced in years. These issues can drive energy bills, reduce system lifespan, and lead to unnecessary emergency callouts.
What are the warning signs?
There are a few red flags to watch for: fluctuating temperatures, unusual noises, rising energy costs, or persistent complaints from building users. If you're seeing any of these, your system might not be running as efficiently as it could be.
Even if you haven't had big issues, an underperforming HVAC system could cost you more than necessary, especially in older or multi-site buildings.
Fix or replace?
Not every system needs replacing. In many cases, a detailed inspection and some targeted interventions, such as updated controls or cleaning and balancing, can restore performance and extend system life.
That said, for some clients, it makes more sense to begin a phased upgrade or retrofit plan. At UES, we always advise based on what will deliver the best long-term outcome, not just the quickest fix. And if renewables are part of your future, we can ensure your HVAC setup is ready to integrate when the time comes.
Why maintenance matters more than ever
Planned Preventive Maintenance (PPM) is one of the simplest and smartest ways to reduce risk and improve efficiency. With a clear servicing schedule, you avoid surprises, improve compliance, and make informed decisions based on real data, not last-minute emergencies.
It's also a great way to extend the life of your assets, which reduces long-term capital costs and contributes to a lower carbon impact.
How UES can help
We work with property teams, schools, clubs and estates managers across the South West and South Wales - offering honest advice, responsive support, and a clear action plan.
Whether your system just needs a tune-up or a deeper review, we'll help you identify where you're losing value - and how to fix it.
If you think your HVAC system could be costing you more than it should, contact the team for a practical, no-fuss system review.