Heat exchange mat

A floor heat exchange mat comprising at least a pair of flexible mat members, each mat member including top and bottom face sheets defining an interior space therebetween, a pair of inserts disposed within said interior space, and heat exchanger means disposed between said inserts, said heat exchanger means including wavy warp and linear weft filaments knitted substantially perpendicularly with each other for allowing a heat exchange fluid to flow through the interior space of said mat member, each mat member including a plurality of side edges, one of said side edges at which said weft filaments terminate being inherently upwardly biased relative to remaining portions of said mat member in response to being heated by the heat exchange fluid, said mat members arranged such that said upwardly biased edges lie side-by-side, and linking means extending along both said upwardly biased edges and joining such edges together, said linking means including upstanding wall means defining a fluid partition between the interiors of said mat members, and sealing means extending around, and sealing, the peripheral edges of said linked mat members, and conducting means for conducting the heat exchange fluid into and from said mat members.