Abstract: An extractor hood including a housing, a vapor shield pivotably mounted on the housing, and at least one pivot bearing connecting the vapor shield to the housing. The at least one pivot bearing has a bearing axis in a vicinity of a center of gravity of the vapor shield.

Abstract: Exhaust apparatus for exhausting “dirty” exhaust gases accept a core flow of such exhaust gases and combine that with an annularly-surrounding “rooftop” flow of ambient air for diluting the exhaust gases as well as expelling the diluted flow in a forcibly expelled plume in order to ensure that the “effective” expulsion distance of the expelled diluted flow is at least the physical length of the exhaust apparatus plus the gains gotten from efflux velocity and flowrate.

Abstract: An apparatus for preventing the accumulation of snow, ice, frost, hail or the like from obstructing the flow of primary air, air or the exhaust into or out of a high-efficiency sealed combustion condensing furnace is provided. The apparatus is also suitable to prevent leaves, animals or other debris from becoming trapped within the air flow pipes of the furnace. The apparatus has a screen which may be electrically connected to a heating device. The apparatus may further be attached to a thermostat to automatically turn the heating device on or off at preset temperatures. The apparatus may be incorporated into new pipes or may be attached onto existing pipes.

Abstract: A grease containment apparatus to remove grease and other contaminants from hot air exiting a kitchen area through a vent system which includes a vertical separator.

Abstract: An exhaust stack is disclosed for protecting exhaust system components from liquid entering an exhaust stack discharge port. The exhaust stack includes a first section defining a first flow passage extending along a first longitudinal axis and a second section having an open end and defining a second flow passage extending along a second longitudinal axis.

Abstract: An inlet and/or outlet air hood comprising vertical storm louvers is provided that is particularly well suited for use on a Mobile Offshore Drilling Unit and other marine vessels, although its use is not so limited. The hood may comprise a basic cube shape, which affords a smaller projected footprint than conventional round- or mushroom-shaped hoods and may incorporate an internal flow shaper, such as an inlet/outlet bell, to reduce airflow resistance. In addition, the hood may be configured to incorporate an internal valve or baffle to create a watertight closure.

Abstract: Exhaust apparatus for exhausting “dirty” exhaust gases accept a core flow of such exhaust gases and combine that with an annularly-surrounding “rooftop” flow of ambient air for diluting the exhaust gases as well as expelling the diluted flow in a forcibly expelled plume in order to ensure that the “effective” expulsion distance of the expelled diluted flow is at least the physical length of the exhaust apparatus plus the gains gotten from efflux velocity and flowrate.

Abstract: A chimney termination cap is provided with a body having a perimeter sidewall with a lower region adapted to be mounted to a chimney. The body has an opening for venting the chimney. A lid is mounted to a top of the body. A tray is mounted within the body for collecting precipitation. One of the body and the tray includes a drainage aperture for draining the precipitation from the tray. In one embodiment, the chimney termination cap includes an integrated slip-sleeve configured to receive a chimney flue or vent pipe.

Abstract: An apparatus for the collection of contaminants from the exit vent of an air ventilation vent. The apparatus includes a trough adjacent the duct forming the exit vent. The apparatus is constructed and arranged such that no contaminants exiting the vent can pass between the apparatus and the duct. The apparatus may also include a cover placed over the trough. The cover is constructed and arranged to allow contaminants to pass between the duct forming the exit vent and the cover and into the trough.

Abstract: A heater includes a housing having an angled top, a fan having a discharge disposed parallel to the angled top of the housing, and a baffle for laminarizing airflow through the heater. The heater may also create airflow through a cover, across a housing, a heat sensitive component, and/or a raceway, and into a housing inlet. The heater may include a manifold having at least one coupling member that slidingly engages and disengages a burner. Methods for propelling combustion air through a heater, laminarizing combustion airflow in a heater, improving the efficiency of a heater, and converting a heater to make it compatible with a different fuel are also disclosed.