42 results about "Forced air warming" patented technology

A combustion system for a portable forced air heater having two frusta-conical sections attached to a circular burner tube, wherein each frusta-conical section has pre-determined vent hole patterns that allow the gas heater to have a variable burn rate.

A filter apparatus for deployment over a duct end in a forced air heating / ventilating / air conditioning system is described. The apparatus has been specifically designed for easy installation, and also for convenient cleaning and maintenance by occupants of the structure where the apparatus is employed. The apparatus preferably overhangs the duct end, thereby allowing improved filtration efficiency and reduced air pressure drop across the filter apparatus.

A steamed humidifier for use with a forced air heating system includes a steam nozzle mounted in the plenum of the heating system and connected to a water feed line connected to a continuous pressurized water source. The water feed line is made of a thermal conducting material and is coiled about a heating element wherein the heating element and conductive coil are substantially surrounded by an insulation barrier. The water feed line is controlled by a solenoid operated valve that will be activated only when the heater is on and a humidistat detects that humidity is required by the area being serviced by the forced hot air system.

A heat pump system is disclosed that utilizes a variable speed hydronics pump to selectively divert heat energy from a forced air heating system to a hydronics radiant heating system. By actively controlling the speed of the withdrawal of heat, the temperature of the forced air output may be maintained while maximizing the amount of heat delivered by the efficient hydronics system. The heat pump system also actively controls the blower of the forced air system. To reduce the frequency of the compressors cycling on and off, a tank may be used to store and dispense heat if the hydronics system is not of sufficient size.

An air pollution control system includes an emission treatment system configured to receive flue gas, to reduce at least one pollutant therefrom, and to output emission treated flue gas. A first air heater in fluid communication with the emission treatment system includes a heat exchanger for heating forced air introduced thereto above a base temperature and thereby cooling emission treated flue gas from the emission treatment system to a stack discharge temperature. A second air heater in fluid communication with the first air heater to receive heated forced air therefrom includes a heat exchanger for heating forced air introduced thereto to a preheat temperature for combustion in a boiler and thereby cooling flue gas introduced from a boiler to the second air heater to an emission treatment temperature. The second air heater is in fluid communication with the emission treatment system to introduce cooled flue gas thereto.

A forced air warming unit has a casing that encloses a scroll housing with a curved inside surface. A blower is disposed in the scroll housing inside the curved surface. Inlet and outlet openings are provided in the casing. A circuit board is mounted in the casing, against the scroll housing so that the blower is enclosed in space between the scroll housing and the circuit board. At least one opening is provided through the circuit board into the space in which the blower is disposed. A tapered, elongate, arcuate heater plate is disposed in the scroll housing between the circuit board and the blower, with a relatively wide end near the outlet opening and a second, relatively narrower end near the curved inside surface. Air is conducted in response to operation of the blower through the inlet opening, along a first side of the circuit board through the one or more openings in the circuit board into the scroll housing. Air is also conducted in response to operation of the blower along a second side of the circuit board which faces the scroll housing, through air passages in the circuit board to and along the first side through the one or more openings, into the scroll housing. Air entering the scroll housing in response to operation of the blower is accelerated by the blower along the curved inside surface while being heated in response to operation of the heater plate. Heated, pressurized air exits the forced air warming unit through the outlet opening. Provision is made for connecting an air hose to the outlet opening for conducting the pressurized, heated air to a pneumatic, convective device.