Flue Kit Installation Explanation for 30°

../Installation Guides/Flue Kit Installation Explanation for 30°

AS/NZS 2918:2001 (section 4.6 pg 31, 32) describes sloped ceilings as having a slope of greater than 30 degrees. It describes the method of installation for ceilings of greater than 30 degrees.

Contrarily AS/NZS 2918:2001 Definitions (Section 1.5.34.1 Penetrations pg 9) defines a sloped ceiling as being greater than a slope of 15 degrees.

SFP has tested, to Appendix F, a penetration of 30 degrees that is installed as per a flat ceiling in our installation instructions. (This was done in conjunction with the NZHHA to support the definition of sloped ceilings as being ceilings of greater than 30 degrees at the time AS/NZS 2918 was being written.) The subsequence document however contained the anomaly.

SFP’s position is that the Consenting Authority must determine whether the ceiling is sloped as per AS/NZS 2918:2001 i.e. 15 or 30 degrees.

We recognise this creates a situation that is not able to be resolved because of the conflict in the Standard. Taking into consideration the test data available from the SFP and NZHHA test supporting the argument that sloped ceilings are ceilings more than 30 degrees we believe there is justification for accepting sloped ceilings being greater than 30 degrees.

If the Consenting Authority determines the ceiling is sloped (i.e. more than 15 or 30 degrees) then the installation needs to be carried out as per the Fireplace Manufacturer’s Instructions for Sloped Ceilings. (This would be based on the SFP Appendix F test data and the Fireplace Manufacturers Appendix B test.)

If the Fireplace Manufacturer does not provide installation detail then the detail for Untested Sloped Ceiling Installations (4.6.3.b) must be followed.