Abstract: Apparatus for use in a heat exchanger assembly having wound fin tubing including a spacer member having a structural portion for securing components within the heat exchanger and a series of spaced projections extending therefrom. The spaced projections define a series of U-shaped openings adapted to receive and maintain the wound fin tubing in a fixed relationship. A retainer element is mounted to enclose the openings to secure the wound fin tubing therein. On some of the projections of the spacer member are mounted tabs which are inserted through slots in the retainer element to secure the retainer element to the spacer member such that the wound fin tubing is secured within the spaced openings and such that the structural portion of the spacer member secures various components of the heat exchanger assembly.