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ATTMA Technical Standard L2 (TSL2) - Measuring Air Permeability in the Envelopes of Non-Simple Buildings Fan Pressurisation Method - Issue 2.0
This document provides the technical standard to be followed for the testing of buildings that are considered non-simple. A non-simple building is defined as buildings with a gross envelope volume of over 4000m3 and includes buildings which can be tested in smaller volumetric sections.
This testing described in this standard is fundamentally based on ISO 9972 Thermal performance of buildings – ‘Determination of air permeability of buildings - Fan pressurization method’ though the guidance is provided by the Air Tightness Testing & Measurement Association.
This Technical Standard provides detailed guidance and clarification of the above standard to ensure consistency by testing companies.
Guidance for test procedures for the testing of buildings that are simple is provided within companion reference document ATTMA Technical Standard L1.
Guidance for test procedures for the testing of buildings that are complex, high-rise or phased handover is provided within companion reference document ATTMA Technical Standard L3.
Guidance for test procedures for the testing of low energy buildings is provided within companion reference document ATTMA Technical Standard L4
