HIU Powerflush London — Plate Heat Exchanger Descale
Is your HIU producing lukewarm water or running noisily? Sludge and scale in the plate heat exchanger could be the cause. Collide Group's specialist HIU powerflush service removes contamination safely and restores your unit's performance.
Sludge & Scale Are Killing Your HIU
London's hard water and the iron-rich water in many heat networks creates a perfect environment for limescale and magnetite sludge to build up inside your HIU's plate heat exchanger. Once it starts blocking, performance falls fast.
- Lukewarm or cold hot water
- Reduced flow at taps and showers
- Unit running continuously at high temperature
- Noisy or vibrating HIU
- Higher than expected energy charges
- Previous servicing showing blocked strainers repeatedly
A Full Powerflush — HIU-Safe
Standard domestic powerflush machines are too aggressive for HIUs. We use methods and chemicals designed specifically for Heat Interface Unit plate exchangers — effective but safe for seals and sensors.
- Pre-flush flow and temperature performance baseline
- HIU-safe chemical dosing and circulation
- Plate heat exchanger descale and flush
- Primary strainer clean and check
- Post-flush performance verification
- Inhibitor treatment to prevent reoccurrence
- Written report with before/after readings
Brands We Cover
Related HIU work in London: HIU Service London · HIU Repair London · HIU Installation London · Bulk Servicing London
The Benefits
Restored Hot Water
Most residents notice an immediate improvement in water temperature and flow rate after powerflushing.
Lower Energy Use
A clean plate exchanger transfers heat efficiently, reducing the unit's run time and primary energy draw.
Extends HIU Life
Removing scale and sludge prevents premature failure of the plate exchanger and surrounding valves.
“Residents in our Greenwich block had been complaining of lukewarm water for months. Collide powerflushed the HIUs and within a day the complaints stopped.”
— Property Manager, Greenwich
HIU Powerflush from £250
Prices start from £250 inc VAT. Heavily contaminated units or block contracts may vary — we always provide a written quote first.
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Book an HIU Powerflush Today
Restore your HIU's performance. Free quotes, transparent pricing, specialist engineers.