Abstract: An air channel device is disclosed for spas or bath units which is mat-like and has a plurality of openings therein to permit the entry of air into a heated bath. The air channel mat is mounted to the interior of the spa bath unit at any desired location including the foot and seat areas. It is secured to the interior surface of the spa by interlocking retainers which seal the periphery of the air channel to the interior of the spa. Air is blown into the spa beneath the air channel mat and then escapes into the bath through the perforations in the mat. The air channel device of the present invention eliminates prior U-shaped exterior air channels which were susceptible to cracking and breakage. The present air channel provides a cushioning effect in the foot and seat areas and also permits uniform aeration for the heated bath.

Abstract: A below ground swimming pool formed of light-weight framed, wood sheet walls arranged within a preformed pool shaped hole, with a water impervious, thin plastic sheet liner covering the inside surfaces of the walls and the ground enclosed by the walls, and with the walls being held against collapsing inwardly, upon draining of the pool, by braces secured to the outer or ground side of the walls. The braces are formed with horizontally extending legs located at the lower edges of the walls so that such legs are weighted by the ground to maintain the braces and walls in position and so that such legs also function as support footings for the walls.