Abstract: In an exhaust duct and a boiler, there are provided: a flue gas duct through which flue gases pass; a first hopper provided to the flue gas duct, the first hopper collecting PA in the flue gases; a low-repulsion section provided to the upstream side or the downstream side of the first hopper in the direction of flow of the flue gases, the low-repulsion section having a lower coefficient of repulsion than the inner wall surface of the flue gas duct; and a popcorn-ash-trapping section for trapping PA in the flue gases, the popcorn-ash-trapping section provided to the downstream side of the first hopper and the low-repulsion section in the direction of flow of the flue gases, whereby it is possible for solid particles in the flue gases to be properly trapped.

Abstract: An exhaust duct and boiler can appropriately collect solid particles in flue gas by way of being provided with: a flue (40) in which flue gas can flow; a first hopper (61) that is provided in the flue (40) and that can collect solid particles (PA) in the flue gas; and a first baffle plate (71) and a second baffle plate (72) that are resisting members capable of blocking the flow of solid particles (PA) from the first hopper (61).

Abstract: A fuel reforming apparatus includes a reforming catalyst, a filtering member, a raw material supply flow passage and a processed gas flow passage. The filtering member has a plurality of cells. A reforming catalyst is carried on a surface of a partition on the side of the processed gas flow passage. If raw gas including hydrocarbon fuel is supplied to the fuel reforming apparatus and filtered by the filtering member, soot included in the raw gas is trapped by gaps in the partition, and the hydrocarbon fuel is reformed into reformed gas including hydrogen and carbon monoxide on the reforming catalyst. By increasing the amount of air supplied from a blower at intervals of time, the soot trapped by the partition is removed by combustion.

Abstract: A pipe consisting of a tee pipe of desired diameter replacing the elbow pipe joining the (wood burning) heater/stove to the exhaust pipe through the ceiling. This tee pipe will have a canister attached in a manner to allow removal after creosote and other debris is cleaned from the exhaust pipe. Said debris will fall into the canister and not enter the living area. Said debris can then be transported securely out of the living area without risk of contaminating the living area. Debris that normally falls into the traditional elbow and clogs it up will be eliminated. Thus reducing the chance of smoke of carbon monoxide from entering the living area.

Abstract: A chimney lock attachable to the support plate of a prefabricated metal chimney having vertically downwardly depending cleanouts, the cleanouts being enclosed by an end cap, the lock comprising an adjustable, planer, longitudinal bar removably or rotatably secured to the support plate and positioned to frictionally engage and secure the end cap of the chimney cleanout.

Abstract: A filter assembly for an exhaust stack having a housing defining an interior chamber and an inlet and an outlet which are connected in series with the exhaust stack. A mounting frame is secured diagonally within the interior of the housing so that the mounting frame is interposed between the inlet and outlet of the housing. A plurality of filter elements are detachably secured to the mounting frame so that influent into the housing inlet passes through the filter elements prior to exhaust out through the housing outlet and to the atmosphere. The filter assembly is easily retrofitted to existing systems by severing and removing a portion of the stack and installing the filter assembly in its place.

Abstract: In order to eliminate flue gases generated in combustion of fuels in heating stoves a heating stove (1) is designed with a duct (14) above the fireplace (5) and closeable by means of a damper (16), whereby the flue gases pass through the bed of embers generated during combustion. A hearth (6) for the bed of embers is designed with obliquely set flat surfaces (26) for attaining of a concentrated bed of embers. There is located in the combustion chamber (58) of the heating stove (1) below the hearth (6) an aperture (9), which communicates with flue ducts (11), which communicate in turn with a flue (20), which discharges the flue gases from the heating stove. By means of a filling hatch (15) access can be gained to the interior of the said duct (14) to fill the heating stove and its fireplace with fuel.

Abstract: A flue system, for adapting a masonry chimney to a wood burning stove, comprises a flexible flue pipe extending from the wood burning stove upwardly through the convolutions of the chimney, and, at the top of the chimney, a control assemblage including a lower anchor plate, an upper rain cover, and extending therebetween a control pipe of particular size and construction. The control pipe has an inner shell composed of stainless steel, an outer shell also composed of a metal, and an interposed insulator. The control pipe is of the correct length and diameter to be heated by the flue gas to a temperature at which creosote condensation at the top of the chimney is minimized or prevented.

Abstract: A flue stack maintenance system particularly for those flues through which grease laden air passes such as for example exist in commercial restaurant kitchens and the like (FIG. 1), which utilizes an expandible, elongated metal foil liner bag which forms a closed interior system except for an air inlet conduit provided for the application into the interior of the bag an air pressure greater than the ambient to balloon out the bag into facing engagement with the interior of the flue stack (FIG. 3B). After the bag is ballooned out, the upper and lower ends are opened and folded over and around the ends of the flue for attaching the foil liner to the flue (FIG. 3C).

Abstract: A fume extraction assembly comprises an elevated canopy adapted to collect fume; and elongated outlet means offset from an apex of the canopy and having gas flow characteristics compensating for a tendency to uncontrolled extraction rates along said outlet means.