Patent ID: 8747765

Claim:
A heat exchange apparatus comprising: a) a furnace body forming an interior cavity, said furnace body including: a first surface and a second surface defining at least a portion of said furnace body, wherein said first surface is positioned exterior with respect to said interior cavity and with respect to said second surface, and said second surface is positioned between said interior cavity and said first surface; b) a first conduit for conveying a fluid to said furnace body; c) a second conduit in fluid communication with said first conduit wherein said second conduit is positioned at least partially within said interior cavity of said furnace body; and d) a joint between said first conduit and said second conduit, wherein (i) said joint moves between a first location and a second location based on the temperature within the interior cavity, (ii) the first location is intermediate said first surface and said second surface, and (iii) said second location is within said interior cavity of said furnace body.