A heat exchange flue, having a top flue gas chamber (1), a bottom flue gas chamber (10) and a heat exchange section (H) located therebetween. The heat exchange section (H) comprises a heat exchange tube bundle (4) located in the middle, and a left side flue (5) and a right side flue (12) which are located at two sides of the heat exchange tube bundle (4). The axis of the heat exchange tube bundle (4) is positioned in a vertical plane extending substantially forward and backward, allowing the flue gas to laterally flush against the surfaces of heat exchange tubes. The left and right side flues (5, 12) are in a vertical box shape, the flues are each provided with a plurality of flue gas dampers (3) which are vertically arranged at intervals in a substantially horizontal alignment. Each of the flue gas dampers (3) is provided with a flue gas damper frame (13) for defining a flue gas port (2) and a flue gas port opening/closing device capable of selectively opening and closing the flue gas port (2). The flue gas damper frames (13) are hollow out and horizontally arranged, and have an outer contour consistent with the sectional shape of the left and right side flues (5, 12), the peripheral edges thereof are respectively connected to a peripheral flue gas wall in an airtight manner, and the parts thereof corresponding to the heat exchange tube bundle (4) are connected to a substantially horizontal flue gas shield plate (6) in an airtight manner. The flue structure can adjust the working load to the greatest extent to ensure the flue gas temperature and prevent condensation.

Certain exemplary embodiments can provide a system, machine, device, and/or manufacture that is configured for operably releasing condensate received from a condensate-producing unit toward a drain without allowing a substantial quantity of gas to flow through the system, machine, device, and/or manufacture, those embodiments including a float and/or a housing.

The present disclosure addresses systems, media, and methods of configuring a heating system comprising a plurality of combustion-type heating devices fluidly coupled to a vent system. Configuring the heating system includes receiving operating pressure data from one or more pressure sensors in a flue of one of combustion-type heating devices and the vent system. The operating pressure data from the one or more pressure sensors is indicative of a pressure at a corresponding location in the vent system. Configuring the heating system further includes comparing the operating pressure data to stored operational pressure data indicative of operational pressure ranges indicative of permissible operating parameters associated with preventing backflow of flue gases into the one of combustion-type heating devices and outputting instructions for a damper to at least partially open or at least partially close based at least in part on the operating pressure data and the stored operational pressure data.

An exhaust and air intake system for a direct vent fireplace. A low-profile manifold assembly is coupled to a direct vent fireplace and is configured to receive exhaust gases from the fireplace and expel the exhaust gases outside of the building in which the fireplace is located. The manifold assembly also takes in fresh air from outside of the building and provides the fresh air to the fireplace to use during combustion. The manifold assembly includes separate chambers for the exhaust gases and the fresh air so that the exhaust gases and the fresh air do not mix together within the manifold assembly. Several pressure reduction and equalization structures are incorporated into the manifold assembly to regulate the amount and pressure of fresh air provided to the fireplace.

An exhaust and air intake system for a direct vent fireplace. A low-profile manifold assembly is coupled to a direct vent fireplace and is configured to receive exhaust gases from the fireplace and expel the exhaust gases outside of the building in which the fireplace is located. The manifold assembly also takes in fresh air from outside of the building and provides the fresh air to the fireplace to use during combustion. The manifold assembly includes separate chambers for the exhaust gases and the fresh air so that the exhaust gases and the fresh air do not mix together within the manifold assembly. Several pressure reduction and equalization structures are incorporated into the manifold assembly to regulate the amount and pressure of fresh air provided to the fireplace.

A modular exhaust configured for exhausting a flue flow of a heat exchanger, the modular exhaust including a cross tube including an inlet end, an exit end and a central axis, wherein the cross tube configured for receiving the flue flow at the inlet end and channeling the flue flow to the exit end; a condensate drainage exit aperture disposed on a bottom portion of the cross tube, the condensate drainage exit aperture configured for draining condensate from the first heat exchanger; and a vertical tube including a central axis, a top end and a bottom end, the cross tube configured to be connected at the exit end of the cross tube to a portion of the vertical tube disposed between the top end and the bottom end, the central axis of the cross tube is not disposed perpendicularly with respect to the central axis of the vertical tube.

A solid fuel combustion device includes: a fuel supply device including a firewood feed pipe or another fuel supplier; a primary combustion chamber coupled to the fuel supply device; a secondary combustion chamber including a wall formed of a fireproof material and having a structure in which a space is formed at a side of the combustion gas outlet of the primary combustion chamber to induce primary combustion gas to be secondarily expanded and combusted; and an air supply system including at least one air supply device in an entire combustion path formed in the primary combustion chamber and the secondary combustion chamber.

An exhaust and air intake system for a direct vent fireplace. A low-profile manifold assembly is coupled to a direct vent fireplace and is configured to receive exhaust gases from the fireplace and expel the exhaust gases outside of the building in which the fireplace is located. The manifold assembly also takes in fresh air from outside of the building and provides the fresh air to the fireplace to use during combustion. The manifold assembly includes separate chambers for the exhaust gases and the fresh air so that the exhaust gases and the fresh air do not mix together within the manifold assembly. Several pressure reduction and equalization structures are incorporated into the manifold assembly to regulate the amount and pressure of fresh air provided to the fireplace.

An exhaust and air intake system for a direct vent fireplace. A low-profile manifold assembly is coupled to a direct vent fireplace and is configured to receive exhaust gases from the fireplace and expel the exhaust gases outside of the building in which the fireplace is located. The manifold assembly also takes in fresh air from outside of the building and provides the fresh air to the fireplace to use during combustion. The manifold assembly includes separate chambers for the exhaust gases and the fresh air so that the exhaust gases and the fresh air do not mix together within the manifold assembly. Several pressure reduction and equalization structures are incorporated into the manifold assembly to regulate the amount and pressure of fresh air provided to the fireplace.

Submerged combustion methods and systems including a melter equipped with an exhaust passage through the ceiling or the sidewall having an aggregate hydraulic diameter. Submerged combustion burners configured to create turbulent conditions in substantially all of the material being melted, and produce ejected portions of melted material. An exhaust structure including a liquid-cooled exhaust structure defining a liquid-cooled exhaust chamber having a cross-sectional area greater than that of the exhaust stack but less than the melter. The exhaust passage and liquid-cooled exhaust structure configured to maintain temperature and pressure of the exhaust, and exhaust velocity through the exhaust passage and the exhaust structure, at values sufficient to prevent the ejected material portions of melted material from being propelled out of the exhaust structure as solidified material, and maintain any molten materials contacting the first interior surface molten so that it flows down the first interior surface into the melter.