Dual category venting system

Abstract

A venting system includes a venting pipe comprising a chase through a structure. The chase includes a first end positioned adjacent an appliance installation, a second end exiting a structure and a third end adjacent another appliance. A vent tube comprising a sealed non-corrosive material is provided in the chase between the second end and the third end, itself coupled to a high efficiency appliance. The vent tube has a first end and a second end and is positioned between the second end of the venting pipe and the third end of the venting pipe. The vent tube is coupled to a first appliance and the venting pipe is coupled to a second appliance. A vent cap is coupled to the second end of the first vent tube and to the second end of the venting pipe.

What is claimed is: 
     
         1 . A venting system, comprising
 a non-flexible metallic venting pipe comprising a chase, having a first end coupled to an appliance and a second end coupled to a vent cap, the vent pipe having a third end;   a flexible vent tube comprising a sealed non-corrosive material, the vent tube positioned between the second end of the venting pipe and the third end of the venting pipe, the tube connected to an appliance at the third end of the venting pipe; and   the vent cap including a first concentric aperture receiving the flexible metallic venting pipe and a second concentric aperture receiving the non-flexible metallic venting pipe,   
     
     
         2 . The system of  claim 1  wherein the end cap comprises a first concentric plate including the first aperture, the first aperture allowing a connection of the vent tube there through, and a second concentric plate including the second aperture, the second aperture coupling to the vent pipe. 
     
     
         3 . The system of  claim 1  wherein the vent tube extends through the vent cap and terminates in a first plane, and the vent pipe terminates at the second aperture in a second plane below the first plane. 
     
     
         4 . The system of  claim 3  wherein the first and second planes are separated by the first concentric plate. 
     
     
         5 . The system of  claim 1  wherein the vent pipe has a first diameter, the vent tube has a second diameter, and the first aperture engages said vent tube, and the second aperture including a second coupling engaging said vent pipe, the second coupling creating a seal between the pipe and an exhaust chamber. 
     
     
         6 . The system of  claim 5  wherein the first aperture is in a first plane and the second aperture is in a second plane below the first plane, the first plane positioned above the exhaust chamber. 
     
     
         7 . The system of  claim 1  wherein the second adapter comprises a fitting at the second end of the pipe having a first coupling engaging said vent pipe and a second coupling engaging said vent tube, the fitting creating a seal the between the vent pipe and the vent tube, the second adapter further including a third coupling having a third diameter, the third coupling engaging one of a category II, category III or category IV compliant venting extension pipe or an exhaust outlet. 
     
     
         8 . The system of  claim 2  further including a shield disk mounted to the disk disposed opposite the vent tube. 
     
     
         9 . A venting assembly, comprising
 a concentric category I venting pipe comprising a chase, having a first end coupled to an appliance, a second end coupled to a vent cap, and a third end;   a concentric category II/III/IV vent tube having a first end and a second end, the pipe disposed between and within the second and third ends of the venting pipe, the tube comprising a sealed non-corrosive material, the second end of the venting pipe connected to an appliance, the first end coupled to the vent cap; and   the vent cap including a first concentric aperture receiving the venting pipe into an exhaust chamber defined by a first plate including the first aperture and a second plate, the second plate including a second concentric aperture receiving the metallic venting pipe.   
     
     
         10 . The assembly of  claim 9  wherein the first aperture allows a connection of the vent tube there through, and the assembly includes a second concentric plate including the second aperture, the second aperture coupling to the vent pipe. 
     
     
         11 . The system of  claim 10  wherein the vent tube extends through the vent cap and terminates in a first plane, and the vent pipe terminates at the second aperture in a second plane below the first plane. 
     
     
         12 . The system of  claim 11  wherein the vent tube comprises a flexible metal tube and the flexible metal tube is coupled to an adapter passing through the vent cap. 
     
     
         13 . The system of  claim 11  wherein first and second planes are separated by the first concentric plate. 
     
     
         14 . The system of  claim 11  wherein the vent pipe has a first diameter, the vent tube has a second diameter, and the first aperture engages said vent tube, and the second aperture including a second coupling engaging said vent pipe, the second coupling creating a seal between the pipe and an exhaust chamber. 
     
     
         15 . The system of  claim 11  wherein the second adapter comprises a fitting at the second end of the pipe having a first coupling engaging said vent pipe and a second coupling engaging said vent tube, the fitting creating a seal the between the vent pipe and the vent tube, the second adapter further including a third coupling having a third diameter, the third coupling engaging one of a category II, category III or category IV compliant venting extension pipe or an exhaust outlet.