Notes on clean air.

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.

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

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.

A major kitchen extract fire in London's White City shows what happens when grease builds up in ductwork — and why TR19 cleaning is a fire-safety duty.

Fire dampers are life-safety devices hidden inside your building's ductwork. Here is what they are, how they work and why they are critical to fire safety.

Government guidance on workplace ventilation and air conditioning after COVID-19, and why clean systems and good indoor air quality reduce airborne risk.

Cleaning your commercial kitchen extract system is a legal and insurance duty. Here is why grease matters and how often to clean under TR19 Grease.

A ventilation ductwork inspection and risk assessment survey identifies contamination, damage and compliance gaps in your building's HVAC system.

Deep cleaning and fogging removes viruses, bacteria and mould from air supply ductwork, restoring a clean fresh-air supply to a recognised hygiene standard.

Fire and smoke dampers stop fire and smoke spreading through ductwork. BS 9999:2017 requires annual testing — here is what that involves and why it matters.

Clean Ducts announced in April 2020 that Gemini AMPM Ltd had been awarded BESCA Vent Hygiene Elite status, the highest standard in the industry.

Clean Ducts, the ventilation-hygiene division of Gemini AMPM Ltd, is a BESA member and cleans ductwork to the TR19 standard insurers recognise.