Companies that appear on this list are authorised to test, at the level stated, as members of the ATTMA Registered Testers Scheme Hint: For faster sea...
Companies that appear on this list are authorised to test, at the level stated, as members of the ATTMA Registered Testers Scheme Hint: For faster searching, use Control (CTRL) and ‘F’ or Command and F if using an Apple Macintosh. EA Calculator Only
Authorised to carry out Envelope Area and Volume calculations but is not authorised to test
Level 1
Air tightness tester able to test dwellings and non-dwellings up to 4000m³ gross envelope volume, tested as a single entity with a single blower door fan.
Level 2
Air tightness tester able to test both Level 1 and large buildings as a single entity, using multiple or trailer mounted fans, except buildings defined in Level 3
Level 3
Testers who have been assessed for a higher level of expertise can test Large, Complicated and High Rise (LCHR), phased and zonal hand-over buildings. Level 3 testers are able to test buildings as defined in Level 1 and 2 Testers who have been removed from the scheme for failure to comply with the scheme rules or companies that have failed to pay the scheme / Lodgement fees. These companies are NOT authorised to test under the ATTMA scheme.
