(1)
A fuel-fired appliance installed on the roof of a building or in another location outside the building shall be installed not less than
(a)
1.2 m from a property line, measured horizontally, and
(b)
3 m from an adjacent wall of the same building if that wall contains any opening within 3 storeys above and 5 m horizontally from the appliance, unless every opening within these limits is protected by
(i)
a closure having a fire-protection rating not less than 45 min determined in accordance with Article 3.1.8.4., or
(ii)
a wired glass assembly permitted for use in a vertical fire separation and described in Article 2.3.15. of MMAH Supplementary Standard SB-2, “Fire Performance Ratings.”