An exemplary insulator for a flue of a residential oven includes a bendable insulating body having a first end, a second end, and a bending portion. A first cut is disposed between the bending portion and the first end and a second cut is disposed between the bending portion and the second end. The first cut is expandable to form a first opening and the second cut is expandable to form a second opening.

A piping system for recovery heat energy from an exhaust gas in a heat recovery furnace, the piping system comprising a piping inlet, where the piping inlet transects a wall of a stack zone of the heat recovery furnace, a piping run, the piping run fluidly connected to the piping inlet, and a piping outlet, the piping outlet fluidly connected to the piping run, where the piping outlet transects the wall of the stack zone of the heat recovery furnace, where the piping system is positioned in a stack zone of the heat recovery furnace between a stack inlet and a stack outlet.

A piping system for recovery heat energy from an exhaust gas in a heat recovery furnace, the piping system comprising a piping inlet, where the piping inlet transects a wall of a stack zone of the heat recovery furnace, a piping run, the piping run fluidly connected to the piping inlet, and a piping outlet, the piping outlet fluidly connected to the piping run, where the piping outlet transects the wall of the stack zone of the heat recovery furnace, where the piping system is positioned in a stack zone of the heat recovery furnace between a stack inlet and a stack outlet.

Disclosed are a flue pipe separation sensing apparatus and a boiler including the same. The flue pipe separation sensing apparatus of a boiler for sensing separation of an exhaust flue pipe that is fitted with and coupled to an exhaust adapter provided in an exhaust opening of a boiler body includes a sensing member located on an outer side of the exhaust flue pipe in a state, in which the exhaust flue pipe is coupled to the exhaust adapter, and that passes through the exhaust adapter by an elastic force and proceed into an interior of the exhaust adapter to sense the separation of the exhaust flue pipe when the exhaust flue pipe is separated from the exhaust adapter.

Disclosed are a flue pipe separation sensing apparatus and a boiler including the same. The flue pipe separation sensing apparatus of a boiler for sensing separation of an exhaust flue pipe that is fitted with and coupled to an exhaust adapter provided in an exhaust opening of a boiler body includes a sensing member located on an outer side of the exhaust flue pipe in a state, in which the exhaust flue pipe is coupled to the exhaust adapter, and that passes through the exhaust adapter by an elastic force and proceed into an interior of the exhaust adapter to sense the separation of the exhaust flue pipe when the exhaust flue pipe is separated from the exhaust adapter.

An exhaust structure includes an intake section including a first high thermal conductivity material, the intake section having an inlet, an output section including a second high thermal conductivity material, the output section having an outlet, and a piping section including a third high thermal conductivity material, the piping section being configured to communicatively couple the intake section with the output section. The exhaust structure provides a high thermal conductivity path from the inlet to the outlet, the high thermal conductivity path including the first high thermal conductivity material, the second high thermal conductivity material, and the third high thermal conductivity material.

An exhaust structure includes an intake section including a first high thermal conductivity material, the intake section having an inlet, an output section including a second high thermal conductivity material, the output section having an outlet, and a piping section including a third high thermal conductivity material, the piping section being configured to communicatively couple the intake section with the output section. The exhaust structure provides a high thermal conductivity path from the inlet to the outlet, the high thermal conductivity path including the first high thermal conductivity material, the second high thermal conductivity material, and the third high thermal conductivity material.

An exhaust pipe holding member includes an annular portion, an annular outward protruding portion (protruding piece), and a flange portion. The annular portion is formed with a through hole penetrating from one end through the other end. The outward protruding portion protrudes peripherally outward from the outer peripheral surface of the annular portion. The flange portion is disposed closer to one end than to the outward protruding portion, extending peripherally outward from the outer peripheral surface of the annular portion, and is configured to have a thickness greater than that of the outward protruding portion. The flange portion is formed with an annular groove surrounding the through hole.

A joint seal system and method may include a seal and a band. The seal may be positioned between abutting flanges of two adjacent duct sections. A band may be positioned over the two flanges and the flange interface. The joint seal system and method may be configured to mitigate and/or eliminate leakage of pressure, flue gases, condensate, and/or any other fluid, gas, and/or vapor between abutting flanges of duct sections at a flange interface.

A joint seal system and method may include a seal and a band. The seal may be positioned between abutting flanges of two adjacent duct sections. A band may be positioned over the two flanges and the flange interface. The joint seal system and method may be configured to mitigate and/or eliminate leakage of pressure, flue gases, condensate, and/or any other fluid, gas, and/or vapor between abutting flanges of duct sections at a flange interface.