F - Mech Eng,Light,Heat,Weapons – 24 – J
Patent
F - Mech Eng,Light,Heat,Weapons
24
J
F24J 2/34 (2006.01) E04F 17/04 (2006.01) F24F 13/02 (2006.01)
Patent
CA 2615086
A ventilation air duct is anchored to a flat roof of a building by means of a ballast material, such as gravel. The weight of the ballast material is selected to secure the duct to the roof without any other fasteners.
Enerconcept Technologies Inc.
Norton Rose Or S.e.n.c.r.l. S.r.l./llp
Solutions Energetiques Enerconcept Inc.
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