A device for distributing waste heat from a heat source evenly across an
exterior surface of an enclosure is disclosed. The device includes a
first layer of material that has a high thermal conductivity along a
first plane. One or more layers of material that include a controlled
thermal conductivity along a second plane are connected with the first
layer. At least one of those layers has a low thermal conductivity (e.g.
a thermal insulating material) in the second plane and that layer is
positioned between the heat source and the enclosure so that heat flow
through that layer is substantially inhibited in the second plane and a
majority of the waste heat is thermally transferred through the first
layer along the first plane to the exterior surface where the waste heat
is uniformly distributed thereby reducing hot spots on the exterior
surface which can cause user discomfort.