Abstract: The present invention provides a large-scale water heater with a telescoping tower having a tower with a storage area proximal to the bottom of the tower; a portion of the tower that telescopes vertically that is pre-filled with a packing media; a nozzle designed to distribute a fluid that is located above the packing media; a firing chamber with a proximal end in fluid communication with the tower; and a burner in fluid communication with the distal end of the firing chamber for combusting fuels.

Abstract: The present invention provides a large-scale water heater with a telescoping tower having a tower with a storage area proximal to the bottom of the tower; a portion of the tower that telescopes vertically that is pre-filled with a packing media; a nozzle designed to distribute a fluid that is located above the packing media; a firing chamber with a proximal end in fluid communication with the tower; and a burner in fluid communication with the distal end of the firing chamber for combusting fuels.

Abstract: A flue gas heat recovery device is described. The device includes a packing tower. The packing tower is adapted to receive a flue gas stream. The packing tower also contains at least one water inlet, a water collection reservoir and a packing tray positioned between the inlet and reservoir. An air induction assembly may be attached to the packing tower or the inlet. A fuel gas line is in thermal communication with the reservoir. The fuel gas line has two ends a first end in close spatial relationship to a distal end of said reservoir, and a second end in close spatial relationship to a fuel output. Finally, a fluid conduit connects the second end of the fuel gas line and the water inlet.