Abstract: In a gas-fired furnace of the type having a manifold assembly, comprising a gas valve, a manifold, orifices extending from the manifold and located on a common line, and a gas control assembly having a burner box compartment, the improvement comprises an apparatus for attaching a manifold assembly to the burner box compartment. The apparatus comprises a plurality of brackets, each bracket being affixed to the manifold at a position essentially 180.degree. from the common line of orifices, and essentially perpendicular to the common line; each end of the bracket is retained near opposite side of the opening of the burner box compartment, and one end of each bracket is affixed to the side wall of the burner box.