However, understanding TR6 remains relevant because many existing buildings were designed and built using this specification. Maintenance engineers retrofitting older systems must understand the "old rules" to properly interface with existing infrastructure.
, titled “Internal Cleaning of Ventilation Systems,” is a technical document produced by BESA (formerly HVCA) in the United Kingdom. It sets out the best practices, standards, and procedures for the cleaning and maintenance of air distribution systems.
: Brief document details and history can be viewed on the NBS Publication Index .
Include signed commissioning reports referencing TR6 compliance in the final building handover operation and maintenance (O&M) manuals. besa tr6 pdf
As the initial search results show, "TR6" is a very common code number. When you are looking for the BESA guide, be careful to ignore search results that relate to:
Exact test pressure thresholds along with calibrated gauge serial numbers and validation dates.
BESA, originally the Heating and Ventilating Contractors' Association (HVCA) founded in 1904 and renamed in 2012, represents contractors in design, installation, commissioning, maintenance, and management of building engineering systems . TR/6 originated in 1980, has been updated multiple times, and remains a cornerstone of safe building services practice. It is widely referenced in specifications, contracts, and training programs. It sets out the best practices, standards, and
TR6 testing relies on a positive or negative pressure application relative to the atmosphere.
: Uses air or inert gas. This is often used for leak detection before a full hydraulic test or where water use is restricted. Low-Pressure Leak Testing : Complementary guidance
| File Extension | Data Format / Manufacturer | | :--- | :--- | | | BioSemi (ActiveTwo system) | | .eeg, .vhdr | Brain Products (BrainAmp/BrainVision) | | .edf | European Data Format (EDF/EDF+) | | .cnt | ANT Neuro (EEProbe) | | .raw, .xml | Electrical Geodesics, Inc. (EGI) | | .gnt, .set | EBNeuro (Galileo) | | .sdy | Compumedics | | .trc | Micromed (System98 EEG) | As the initial search results show, "TR6" is
: Requires alternative testing metrics due to the material’s viscoelastic nature (creep and expansion under load), which can mimic a pressure leak if not evaluated correctly. 2. Pneumatic Leak and Pressure Testing
For practicing building services consultants, engineers, and QA inspectors, obtaining an authorized copy of the guide is required to produce valid testing documentation.
TR6 defines acceptable levels of cleanliness. It provides guidelines on what constitutes a "clean" system versus a "contaminated" one, often relying on tests like the or vacuum test method. 3. Cleaning Methodologies