How One Office Saved £48,300 After a TM44 Inspection in 2025

A TM44 Inspection That Turned Into a £48,300 Surprise

Most companies book a TM44 inspection because they have to.
Legal requirement. Energy performance rules. Avoiding fines.
Simple.

But in early 2025, one medium-sized office in Birmingham booked a standard TM44 inspection with our team and ended up saving £48,300 per year in energy waste they didn’t even know existed.

This wasn’t magic.
No new equipment.
No expensive upgrades.
Just accurate TM44 analysis, a few smart fixes, and a building that finally worked the way it was supposed to.

This case study breaks down exactly what we found, how we fixed it, and how TM44 inspections can deliver massive savings for any office across the UK.

If you manage commercial buildings, work in facilities, or run an office with AC systems over 12 kW, this story is exactly what you need to read.

🔗 If you’re new to TM44 and want the basics first, check out our main guide:
TM44 Air Conditioning Inspections → https://tm44.uk/tm44-air-conditioning-inspection/

The Problem — Rising Energy Bills and a Failing AC System

The office had been dealing with:

• unpredictable temperature issues

• Higher energy bills every quarter

• noisy AC units

• cooling failures in certain rooms

• staff complaints

• old F-Gas logs with gaps

Like most businesses, they assumed the building “just needed servicing”.
But a TM44 inspection digs deeper than a service visit. It analyses efficiency, performance, controls, design, refrigerant use, maintenance history, and energy loss.

Within the first hour, our engineer already suspected this wasn’t a normal inspection.

What the TM44 Inspection Found (The 5 Costly Issues)

1. AC Units Running Overnight — 7 Days a Week

The biggest shock:
Two large external condensers were running 24/7, even when the building was empty.

This alone accounted for nearly £22,000 per year in wasted electricity.

The problem?
A broken control panel and manual overrides that staff didn’t know how to reset.

2. Blocked Air Filters Increasing Energy Usage by 15–20 Percent

Dirty filters = more pressure on fans = more electricity.

For this building, airflow was so restricted that some rooms were overcooling while others barely cooled at all.

Simple fix. Massive result.

3. Heat Gain From Poorly Insulated Ductwork

One supply duct in the ceiling void had deteriorated insulation.
This caused the AC to work harder in the summer and lose heat in winter.

Annual estimated waste: £8,600.

4. F-Gas Leak Causing System Inefficiency

One of the older splits had a minor refrigerant leak.
Not large enough to trigger alarms, but enough to reduce performance.

This reduced efficiency by around 18 percent, costing another £6,900 in added energy use.

(We fixed this the same day with an F-Gas repair and recharge.)

5. Wrong Control Settings Across Multiple Rooms

Different parts of the office had:

• 19°C cooling

• 23°C heating

• windows open

• fan speeds on maximum

• meeting rooms are cooled all day with no occupancy

Control misconfiguration = unnecessary waste.

Estimated annual cost: £10,800.

The Total Savings Breakdown

Here’s what the TM44 inspection identified:

That’s a return on investment of nearly 100x.

How Our Team Implemented the Fixes

TM44 inspections from TM44.uk aren’t just “report and leave”.
Our engineers always walk the client through actionable steps.

Here’s how we sorted it:

✔ Reset and reprogrammed all AC timers

Set correct start/stop times.
Applied night mode.
Synced weekend shut-offs.

✔ Cleaned and replaced filters

Immediate airflow improvement.

✔ Reinsulated the ducting

Energy loss dropped instantly.

✔ Fixed the refrigerant leak and recharged the system

Brought the unit back to full capacity.

✔ Updated all wall controller settings

Created a standardised building-wide temperature policy.

The Office’s Reaction (And Why It Matters)

Three weeks after the inspection, the facilities manager emailed us:

“The building finally feels balanced. Our energy usage has dropped noticeably.
We wish we did this inspection years ago.”

This is the reality:
TM44 inspections are not just paperwork.
They can transform how your building performs and save thousands.

And in 2025, with rising energy prices and stricter rules, the value is even higher.

🔗 If you manage multiple sites, check out our special page:
Portfolio TM44 Management → https://tm44.uk/portfolio-tm44-management/

How You Can Get Similar Savings in Your Building

If your office has AC systems over 12kW, the inspection is legally required.
But if you want real savings, not just compliance, here’s how to benefit:

1. Book a TM44 inspection early (don’t wait for deadlines)

It gives you time to fix issues before they become expensive.

2. Combine TM44 with an annual AC health check

This prevents small efficiency issues from turning into major losses.

🔗 Learn more here:
Annual AC Health Check Service → https://tm44.uk/annual-ac-health-check/

3. Keep F-Gas logs updated

Leaks are one of the top efficiency killers.

4. Implement a temperature policy

Most commercial buildings run the AC too cold.

5. Recheck timers every 3–4 months

Controllers reset after power cuts, maintenance, or user mistakes.

Why TM44.UK Delivers Better Results

Many providers offer a cheap TM44 certificate.
But cheap inspections don’t dig deep — they just tick boxes.

What we provide:

• accredited engineers

• building-wide optimisation

• photographic evidence

• correction recommendations

• government-lodged certificate

• optional same-day remedial work

• full cost-saving breakdown

Our focus is real impact, not paperwork.

🔗 Explore our main service page:
TM44 Air Conditioning Inspection → https://tm44.uk/tm44-air-conditioning-inspection/

The 2025 Regulation Push — Why This Matters More Than Ever

With the UK pushing toward the 2050 Net Zero target, non-compliant buildings are under more scrutiny.

2025 onwards brings:

• stricter enforcement

• higher fines

• more site checks

• closer monitoring of AC systems

• financial penalties for missing TM44 certificates

This means energy waste = higher cost AND risk.

A proper TM44 inspection protects you from both.

🔗 For help with MEES rules too:
MEES Compliance Support (2025 Ready) → https://tm44.uk/mees-compliance-support/

Your Building Could Be the Next £48,300 Success Story

The office in this case study didn’t do anything special.
They just booked a proper TM44 inspection.

The result?
A building that performs better, costs less and complies with government standards.

If you want to reduce CO₂ output, cut energy bills or avoid penalties, this is the easiest win you’ll get all year.

👉 Ready to find out how much your building could save?

Get a fast quote here:
Get Your TM44 Inspection Quote → https://tm44.uk/get-quote/