08:00 The building takes its first breath

Every breath, clean.

A building breathes around eight times an hour. Behind the grilles, its kitchens, risers and dampers collect the grease, dust and fire risk nobody sees. We keep the whole system clean and safe: duct hygiene, kitchen extract, fire dampers and ventilation, all cleaned, tested and certificated to TR19.

Free site survey · a named engineer replies within 24 hours
Ductwork installation on a live site
Supply ductwork · live site · South East
Air hygiene · grease · fire safety · the system end to end Cleaned · tested · certificated
TR19®
Every clean documented to BESA TR19 & TR19 Grease: photographed, logged, certificated
BESCA
Vent Hygiene Associate member. Our work independently verified
850+
Projects delivered across a decade of ventilation hygiene, in a group trading since 1997
24/7
One group line, answered by an engineer, every hour of every day

10:30 On the tools

Our service lines. One standard.

Two jobs, one team: the air a building breathes, and the grease, dust and dampers that put it at risk. Every line below is cleaned, tested and certificated by the same engineers.

01 Ductwork cleaning Camera-verified cleaning of ventilation ductwork to BESA TR19, with a compliance report and photo evidence. 02 Kitchen extract cleaning Grease deep cleaning of commercial kitchen canopies, ductwork and fans to BESA TR19 Grease, with certification. 03 Fire damper testing Fire damper testing, inspection and maintenance to BS 9999:2017, evidenced with drop tests and photographic reports. 04 Air conditioning Filter, coil and condensate cleaning for commercial air conditioning, with mechanical work delivered through our accredited partners. 05 AHU cleaning BESA TR19 cleaning and reporting for air handling units: better air quality, lower energy costs and clear compliance. 06 Ductwork CCTV surveys Camera inspection of your full ductwork system, including inaccessible runs, with a written and video condition report. 07 Mechanical air ventilation Design, installation and maintenance of mechanical ventilation that keeps your building's air fresh and compliant. 08 Ductwork & AHU installation Design, install and commission HVAC air handling units and ventilation ductwork for buildings across the UK. 09 Cleanroom commissioning Validation, air balancing and commissioning that prove your cleanroom meets its ISO 14644 cleanliness class. 10 Water hygiene Legionella control, tank inspection and cleaning, and water system monitoring for commercial buildings, with the records that prove it.

13:00 How every job runs

Hygienic air. Spotless ductwork.

The promise hasn’t changed in a decade. Every job (a school AHU or a takeaway’s grease duct) runs the same three-step spine.

01 Clean

Ductwork, grease extract and AHUs cleaned to TR19. Access panels opened, deposits removed and measured, before/after photographed.

02 Test

Fire dampers dropped, systems balanced, airflows measured, clean rooms validated against the standard that applies.

03 Certify

Reports and certificates issued and filed: audit-ready evidence in your inbox, not a verbal all-clear.

15:45 Proven, not promised

A job here ends with evidence.

Photographs, deposit measurements, test results, certificates, all filed and sent before we leave site. If it isn’t documented, it didn’t happen; so we document everything.

Job log · hotel, RH15
08:14 · Access panels opened, floor 3 riser. Photographed.
10:40 · Kitchen grease extract cleaned, deposits measured. TR19 Grease pass.
13:05 · Fire damper FD-31 drop-tested. Pass.
15:20 · System re-balanced, airflow logged. Within spec.
16:20 · Certificates issued to FM. Filed.

16:30 Recent work

The work speaks.

Ventilation, ductwork and validation projects delivered across commercial, healthcare and science estates.

Ventilation survey camera inspection
Ductwork camera inspection case study

A ventilation camera survey of high-rise ductwork in Kensington and Chelsea for property and construction consultancy Calford Seaden.

Read the case study →
Ventilation installation and support services
Hull Hospital Ductwork and Ventilation Case Study

Clean Ducts was called in to remedy failed ductwork at Castle Hill Hospital, Hull, restoring a clean-room ventilation system with survey, cleaning and testing.

Read the case study →
Air ventilation cleaning
National Physical Laboratory

Clean Ducts cleaned the full supply and extraction ventilation system at the National Physical Laboratory to BESA TR19 and HTM03, completed in ten days.

Read the case study →
All projects →

17:30 Where we work

Buildings that can’t get it wrong.

Care homesFacility managementStudent accommodationSocial housingEducationHospitals & healthcareFast foodRestaurantsHotelsFood productionClean roomsData centresDental clinicsMilitary sitesScience facilitiesAirportsConcert venuesLogistics hubsShopping centresTrain stations
All sectors →

18:15 Worth knowing

Notes on clean air.

Insight
Don't Let Your Kitchen Extract System Become a Headline Fire

When grease ignites, a kitchen extract system can act like a chimney. Regular TR19 Grease cleaning of ductwork, canopy and fan is how you keep fire risk down.

Read →
Insight
Kitchen extract compliance for fast food kitchens

TR19 Grease-compliant kitchen extract cleaning for high-use fast food and QSR kitchens, with certified photographic reports your insurer needs.

Read →
Insight
Understanding TR19 cleaning: the comprehensive guide

BESA created TR19 to define how ventilation systems should be cleaned. Here is what the standard covers, why it matters, and how often your building needs it.

Read →
All insights →

18:45 The detail

Ventilation hygiene, in depth.

What TR19 ventilation hygiene involves

TR19 is BESA’s Guide to Good Practice for the internal cleanliness of ventilation systems, and it is the benchmark for everything we do. In practice that means ductwork cleaning that strips out the dust and debris your system collects as it runs, AHU cleaning so the plant that moves your air is as hygienic as the ducts it feeds, and deposit measurements taken before and after, so the result is proven rather than assumed. Where you cannot see the problem, duct camera inspections and smoke testing find the blockages and failures hiding behind the grilles. Many of our supervisors and engineers have over 30 years in the ventilation industry, and as a Vent Hygiene Associate member of BESCA our work is independently verified. Whether your building is an office, a school, a hotel or a clean room, the standard it is cleaned to does not change.

Kitchen extract is a fire-safety duty

Every service in a commercial kitchen pushes grease-laden air into the extract system, and the layer it leaves behind is a fire risk sitting directly above the cooking line. Regular kitchen extract cleaning removes that build-up, keeps grease and odour moving efficiently out of the kitchen, and keeps you compliant with fire safety and health regulations. We design and install kitchen extraction systems that meet regulatory standards from day one, then keep them clean for the life of the kitchen, so the same team that built the system answers for its condition. The duty is the same whether you run one restaurant kitchen or a fast food estate with dozens of sites: deposits measured, photographed and certificated to TR19 Grease, so you can show exactly when the system was cleaned and to what standard.

What annual fire damper testing covers

Fire dampers are the shutters inside your ductwork that close to hold back fire and smoke between the compartments of a building, and they only earn their keep if they actually close. Annual fire damper testing covers locating and accessing every damper in the system, drop testing each one to prove it releases and closes, cleaning and resetting it, and recording the result with photographs. Any damper that fails is reported so it can be repaired, because an untested damper is an unknown sitting in your fire strategy. Comprehensive testing keeps your systems compliant with fire safety regulations, reduces fire risk and improves the safety of the building for everyone who uses it.

Indoor air quality, efficiency and running costs

A building breathes what its ductwork holds. Cleaning your ducts improves the air people breathe, boosts system efficiency, reduces energy costs and prevents the potential health hazards that come from dust and debris build-up. Filtration matters just as much, and we advise on the best filtration options for your system so air quality, energy efficiency and long-term performance improve together. Where fresh air rates are critical, mechanical air ventilation keeps supply and extract in balance, and in hospitals and healthcare estates or education buildings, where people have the least choice about the air they breathe, hygiene is part of the duty of care. Planned maintenance keeps a clean system clean: routine inspection and cleaning prevent problems before they arise, keep the system operating at peak efficiency and extend the life of your equipment, rather than waiting for a failure to force the issue.

Survey first: how every job is scoped

Every building has unique needs, so every job here starts with a survey rather than a guess. A ventilation survey assesses the performance and condition of your current systems: what needs cleaning, what needs testing, where access panels need installing, and where the quickest gains in ventilation and air quality sit. From that we scope the work and tailor the solution to your space, whether that is an office, a university, a hotel, a restaurant, a hospital or a clean room. Where systems are new, altered or critical, commissioning and balancing brings them to optimal capacity, and validation proves the system is performing as intended and meeting the standards that apply to it. If a system needs replacing rather than rescuing, our ductwork and AHU installation team handles the design and the fit, and when a fault does appear, prompt diagnosis and reliable repair restore the system with minimal downtime. The survey is free, and it ends the way every job here ends: with a clear record of what your building needs, and the evidence to prove what was done.

19:00 Same group, same standard

The air shift of AMPM Group.

Clean Ducts is the ventilation-hygiene brand of Gemini AMPM Ltd, the employee-owned firm that has protected the South East’s buildings since 1997.

Gemini keeps the night. AMPM Building Services keeps the day. We keep the loop that never stops: the air, and everything it moves through. Same group. Same standard. Same name on the certificate. And the name means it: AMPM stands for Asset Management and Planned Maintenance, the discipline every one of these jobs runs on.

About the group
AMPM Group
Clean DuctsAM ↻ PM · the air shift

24/7 The air doesn’t clock off

Ready for cleaner air?

Book a free site survey and a named engineer comes back within 24 hours. Emergency? The group line is answered by an engineer, every hour of every day.