Heat recovery system

Abstract

A double pipe configuration for an HVAC system comprising an outer pipe, where the outer pipe is a hot gas exhaust pipe; an inner pipe positioned within the outer pipe, where the inner pipe is a cold air intake pipe, and where the cold air of the inner pipe is warmed by the hot exhaust of the outer pipe; and a plurality of radial fins to support the inner pipe within the outer pipe, where the radial fins redirect the heat within the outer pipe to warm the cold air within the inner pipe. The double pipe configuration may also be configured with a 90 degree elbow structure or a 45 degree bend structure to allow for the pipe to be positioned around objects.

What is claimed is: 
     
         1 . A double pipe configuration for an HVAC system comprising:
 an outer pipe, where the outer pipe is a hot gas exhaust pipe;   an inner pipe positioned within the outer pipe, where the inner pipe is a cold air intake pipe, and where the cold air of inner pipe is warmed by the hot exhaust of the outer pipe; and   a plurality of radial fins to support the inner pipe within the outer pipe, where the radial fins redirect the heat within the outer pipe to warm the cold air within the inner pipe.   
     
     
         2 . The double pipe configuration for an HVAC system according to  claim 1 , where the outer pipe is 3 inches in diameter and the inner pipe is 2 inches. 
     
     
         3 . The double pipe configuration for an HVAC system according to  claim 1 , where the inner pipe includes a set of internal fins. 
     
     
         4 . The double pipe configuration for an HVAC system according to  claim 1 , where individual double pipe configurations are slip fit to each other. 
     
     
         5 . The double pipe configuration for an HVAC system according to  claim 1 , where the inner pipe and the outer pipe are made from one of at least copper, galvanized steel and aluminum. 
     
     
         6 . The double pipe configuration for an HVAC system according to  claim 1 , where the double pipe configuration is a 90 degree elbow structure to allow the system to be positioned around obstacles. 
     
     
         7 . The double pipe configuration for an HVAC system according to  claim 1 , where the double pipe configuration is a 45 degree bend structure to allow the system to be positioned around obstacles.