Knowledge centre
Ventilation hygiene knowledge centre
A curated index of the guidance, technical notes and service explainers we publish on VentilationHygiene.uk. Grouped by topic so facilities teams, landlords and contractors can find the right reference quickly — from BESA TR19 and AHU hygiene through to kitchen extract and sector-specific programmes.
TR19 & compliance guidance
How BESA TR19 ventilation hygiene guidance is structured, how it applies to commercial buildings, and how to scope cleaning so the result is defensible.
What is TR19?
A plain-English explanation of TR19 ventilation hygiene guidance and how it differs from TR19 Grease.
Read moreTR19 compliance guide
What a TR19-aligned cleaning programme looks like in practice, and what an evidence pack should contain.
Read moreTR19 duct cleaning
Service overview for TR19-scoped duct cleaning across supply, return and recirculating systems.
Read moreVentilation hygiene standards
How cleanliness expectations are set and verified, and what inspection-led maintenance looks like.
Read more
Ventilation hygiene basics
What ventilation hygiene actually means in a commercial building, why it matters, and where the cleanliness gains come from.
Why ventilation hygiene matters
The operational, regulatory and occupant-experience reasons commercial systems need an active hygiene programme.
Read moreDuct hygiene
What duct hygiene covers, how condition is assessed and where most contamination accumulates.
Read moreVentilation system cleanliness
Visual indicators of contamination and how to prioritise which sections of a system to clean first.
Read more
Ductwork contamination
What ends up inside commercial ductwork over time, what it looks like, and how it affects system performance and occupants.
AHU hygiene
Air handling units carry most of the hygiene risk in a commercial system. These resources explain how to inspect and clean them.
Grease & kitchen extract
Kitchen extract systems carry specific fire and hygiene risk. These resources cover the TR19 Grease-aligned approach.
Grease build-up in extract systems
How grease accumulates through canopies, risers and roof discharge, and why it matters.
Read moreVentilation fire-risk cleaning
Grease extract hygiene aligned with TR19 Grease, and how it fits a wider fire-risk picture.
Read moreExtraction duct cleaning
Service overview for kitchen and process extract systems, including out-of-hours delivery.
Read more
Inspection & maintenance
An inspection-led approach gives facilities teams a defensible basis for prioritising hygiene work.
Ventilation system inspection
What an inspection covers, how findings are reported and how they feed a maintenance plan.
Read moreVentilation risk assessment
Whole-system review with a prioritised remediation plan for FM-led maintenance.
Read moreVentilation maintenance guide
How to combine inspection, cleaning and verification into an ongoing hygiene programme.
Read more
Commercial building ventilation
Ventilation hygiene as part of running a commercial building — across landlord, tenant and FM responsibilities.
Commercial building ventilation
How hygiene programmes are structured across multi-tenant and multi-site commercial estates.
Read moreCommercial duct cleaning
Service overview for commercial duct cleaning at scale, with phased delivery options.
Read moreVentilation cleaning services
Overview of the full range of ventilation cleaning services VentilationHygiene.uk provides.
Read more
Sector guidance
How ventilation hygiene priorities change between sectors — from offices to healthcare to hospitality.
Office ventilation hygiene
AHU, FCU and supply-duct hygiene for offices, focused on occupant comfort and complaints reduction.
Read moreOffice ventilation systems
Typical office ventilation set-ups and where most hygiene work concentrates.
Read moreCommercial buildings
Inspection-led hygiene programmes for landlords, FM companies and managing agents.
Read moreHealthcare estates
Hygiene support for healthcare estates teams, focused on estate maintenance and documentation.
Read moreSchools & education
Ventilation hygiene structured around academic calendars and kitchen/hall extract systems.
Read moreIndustrial facilities
Process extract, dust loading and planned shutdown windows in industrial environments.
Read moreHospitality & kitchens
TR19 Grease-aligned hygiene for kitchen extract systems in hotels, restaurants and venues.
Read more
Need work scoped on a specific building?
The knowledge centre explains the principles. When you're ready to apply them to a specific site, the fastest route is a quote request or a hygiene inspection.