Abstract: An air circulation circuit including components that are in fluid communication. An air return connection is disposed downstream of the indoor space wherein the air return connection is configured to deliver an air stream from the indoor space to an economizer. The economizer is disposed downstream of the air return connection. The economizer is configured to exhaust a portion of the air stream. The economizer is configured to take in an amount of fresh air to mix with the air stream. The economizer further includes an air return fan disposed inside of the economizer to facilitate a flow of the air stream.

Abstract: A fan structure includes a fan impeller, a fan seat and a hollow shaft rod. The fan impeller has a circumferential section and a top section. The circumferential section has multiple fan blades. The fan seat has a bearing cup. A light-emitting unit and a photoconductive component are received in the bearing cup. The hollow shaft rod has a first end, a second end and a through hole. The through hole axially passes through the hollow shaft rod between the first and second ends. A first end of the hollow shaft rod is inserted in the top section of the fan impeller. A second end of the hollow shaft rod is inserted in the bearing cup of the fan seat and assembled with the photoconductive component. The fan structure improves the shortcoming of the conventional light-emitting fan that the light can be hardly fully projected.

Abstract: A wall mounted heat exchanger including a plurality of panels. Individual panels may include a first end, a second end, a first sidewall, a second sidewall, a first gap disposed along the second end, and a second gap disposed along the second sidewall. A first plurality of panels may be arranged such that first ends of the first plurality of panels are co-planar with second ends of a second plurality of panels and first sidewalls of the first plurality of panels are co-planar with second sidewalls of the second plurality of panels. The first plurality of panels and the second plurality of panels, when arranged, may form a plurality of first inlets from the second gap, a plurality of first outlets from the first gap, a plurality of second inlets from the second gap, and a plurality of second outlets from the first gap.

Abstract: The air destratifier comprises: a casing (10), an intake tube (26) connected to the casing (10) to draw the air from the upper part of the space where the air destratifier is intended to be installed, and a centrifugal blower with a vertical axis of rotation (23) arranged downstream of the intake tube (26) to dispense to the space the air drawn through the intake tube (26). The air destratifier further comprises an air filter (14) arranged in the casing (10) upstream of the blower.

Abstract: Described is a decorative air conduit for use with a heating, ventilation, and air conditioning (HVAC) system. The air conduit is an elongated tube having a hollow interior volume through which air can flow. The air conduit preferably has a right triangular cross section such that it can be positioned at or near the intersection of a wall and a ceiling within a room. The air conduit includes apertures spaced at a fixed interval thereon that allow for air to escape the conduit. The apertures can be on an upper surface of the conduit or can be on an outer surface thereof. A decorative molding can be positioned on the outer surface of the conduit and may include apertures thereon. The decorative molding can include various ornamental embellishments, and the decorative molding conceals the air conduit while providing an aesthetically pleasing outward appearance.

Abstract: Systems are provided for cooling data centers based on a cooperative system including a plurality of Indirect Air-Side Economizers, also referred to as Recirculation Air Cooling Units, that are advantageously operated in conjunction with one or more Side Stream Filtration Units or filters inclusive to a portion of the IASE/RACUs, and one or more Make-Up Air Dehumidification/Humidification Units for the introduction of ventilation air and control of humidity within the enclosed space. An objective of the systems according to this disclosure is to provide the necessary rejection of heat, removal of particulate from the air, and control of the absolute moisture content of the air within a data center.

Abstract: A heating unit can reduce the rate of power consumption for heating a vehicle, so that the running distance of the vehicle is increased and hence the battery charging cycle of the vehicle is prolonged. A heating unit of a vehicle heating system includes a casing made of a metal material capable of electromagnetically shielding microwaves, a support arranged in the hollow section of the casing, a plurality of microwave absorbing/heat emitting members arranged at the support and a microwave outputting unit arranged in the casing to output microwaves toward respective microwave absorbing/heat emitting members, blown air being heated by heat generated as a result of absorption of microwaves by the microwave absorbing/heat emitting members at the time for blown air to flow from the upstream side to the downstream side in the hollow sections of the microwave absorbing/heat emitting members.

Abstract: This invention relates to a mixing device for an aircraft air conditioning system with a supply conduit for fresh air from the air conditioning system, with a second supply conduit for recirculated air from a pressurized region of the aircraft, and with a discharge conduit for supplying mixed air into the pressurized region of the aircraft, wherein a non-return valve is integrated in the mixer.

Abstract: An automated vending machine that can be selectively configured to include one or several temperature zones. A single refrigeration system and universal interior allows easy and economical assembly into a one, two, or three temperature zone machine. Thermal breaks and dividers are used to partition zones, when needed. The basic vending machine cabinet, dispensers, and controls are not changed between configurations. In one aspect, a universal air duct can be used for all three configurations, with minor changes.

Abstract: An exemplary temperature control system for animal confinement buildings includes an agricultural heater and a ventilation system. The agricultural heater is modified to be a variable rate heater using SmartBox technology or by applying appropriate control logic and outputs to a conventional room controller. A heat on/off relay of the room controller can serve as an enable signal connected to the SmartBox. Heating is controlled using a proportional-plus-integral algorithm for error correction. Error correction may be ceased when temperatures fall within a dead band. Heat is turned on when the temperature drops to an on temperature equal to a set point minus 0.5 F. Heat can be turned off when the heater has been at a minimum output level for a minimum output period (such as 90 seconds) and the temperature has not dropped below the on temperature during the minimum output period. An auto-variable radiant brooder may be incorporated.

Abstract: The invention relates to an arrangement in a hot air aggregate comprising a cover (2) having a built-in fan (3), an enclosed chamber (4) after said fan (3) which extends into a conically formed, front portion (5), to which a burner unit (7) having an enclosed burner (9) supplied with a gas flow and a nozzle (10) are provided via a connecting coupling sleeve (6).

Abstract: The present invention relates to a window having ventilation equipment.

Abstract: A method of ventilating a boiler system (10) during boiler system outages includes shifting (64) to the ventilation system (11) by stopping (70) the boiler system induced draft fan (32), closing (71) an internal isolation damper (19) in the boiler system ductwork (14), opening (72) a ventilation isolation damper (18), and starting (73) a ventilation fan (12). At the completion of the outage, before resuming operation of the boiler, the ventilation system (11) is secured (64) by stopping (80) the ventilation fan (12), closing (81) the ventilation isolation damper (18), opening (82) the internal isolation damper (19), and starting (83) the induced draft fan (32).

Abstract: Flame-effect heating apparatus comprises a housing with walls defining an air duct extending therethrough. Simulated fuel is supported by the housing, externally of the duct, and at least one flame-effect generator is disposed in the duct. A light source is provided in the housing to illuminate both the simulated fuel and the flame-effect generator. A mirror is supported by the housing so that light reflected by the flame-effect generator is incident thereon. A wall of the housing which defines the air duct, is formed as a viewing screen on which light reflected by the mirror falls, the viewing screen being positioned higher than the simulated fuel. An electric fan causes air to flow through the air duct, so causing operation of the flame-effect generator, and a heat exchanger disposed in the duct warms air passing thereover.

Abstract: A low speed cooling fan that is designed to cool individuals located in large industrial buildings. A fan with a diameter between 15 to 40 feet consisting of a plurality of blades, with each in the shape of a tapered airfoil, is driven by an electric motor to produce a very large slowly moving column of air. The moving column of air creates a uniformly gentle circulatory airflow pattern throughout the interior of the building thus promoting the natural evaporative cooling process of the human body at all locations inside the building.

Abstract: A cooling fan with a light-emitting device has a frame, multiple light-emitting diodes (LEDs), a circuit board, a stator, permanent magnets and an impeller. The permanent magnets are formed around the inside-perimeter of the casing of the impeller. The impeller is rotated by the interaction force between the poles of the electro-magnetized stator and the poles of the permanent magnets in the impeller. The rotational speed of the impeller is controlled by the drive circuitry on the circuit board. Each LED projects light towards the impeller and to the frame so the light will reflects and bounces all over the fan to produce a fantastic visual effect. The LEDs can be made to twinkle based on the rotational speed of the fan to increase the visual attractiveness.

Abstract: A thermal regulator stabilizes the temperature within an internal cavity of an instrument. The thermal regulator includes a circulator that draws ambient medium surrounding the instrument and recirculated medium within the internal cavity, into a duct. The circulator forms a mixture of the drawn ambient medium and recirculated medium. An adjustable heater intercepts the mixture and controls the temperature of the mixture to be within a temperature range that is less than a temperature range of the ambient medium in which the instrument is surrounded.

Abstract: The present invention discloses a frame structure with far infrared heating function, wherein a far infrared electro-thermal plate is mounted on the back of the canvas, and an energy chamber extends backwards from the back of the frame, and the energy chamber has a plurality of ventilation holes on its top and bottom rims to enable the air convection through the ventilation holes under the drive of heat generated from the electro-thermal plate and accumulated in the energy chamber to heat the room. Thus the fresco has double effects of both indoor decoration and electro-thermal heating.

Abstract: A heater control system is operable to modulate a heater of a building or warehouse or the like, in order to maintain the temperature rise of air passing through the heater at or below a maximum allowable temperature rise value. The maximum allowable temperature rise value is determined by a percentage or proportion of outside air being inducted into the heater and the type of heater, in order to limit the accumulation of carbon dioxide within the building. The control system is operable to modulate the heater in response to an outside air temperature, an inside or return air temperature, and the proportion of outside air to return air being inducted into the heater. Preferably, the proportion of outside air is determined by a position of a damper, which is operable to vary the relative flows of outdoor air and return air which are inducted into the heater.

Abstract: Method to operate a combustion device in a house or similar building, with fossil fuel furnaces, such as wood or oil furnaces. Outdoor air is supplied to a heat exchanger that is connected to the smoke tube of the furnace, in such an amount that an interior excess pressure is created, as excess air is led out of the interior of the building through one or more exhaust openings, especially exhaust devices, which are located at low places in the building at its outer side. This offers better combustion efficiency, better energy-utilization and a more uniform temperature in the building. A device for operating the method, comprises a fan (23) which takes in air from an inlet (19) near the outer walls of the building, through a tube (24) leading to the furnace, with a heat exchanger (33, 34) enclosing some of the smoke tube (18) of the furnace (17). The fan (23) is dimensioned and operated to create an overpressure in the building.

Abstract: A gas fireplace is provided having a plenum formed around at least a portion of the fireplace firebox. Room air enters the plenum and is heated by the firebox prior to venting back into the room. Two openings are provided from the outside of the fireplace housing to the plenum. The first opening allows heated air to exit the plenum, while the second opening allows cool outside air to enter the plenum. a mechanism is provided to control the amount of heated air exiting the first opening and the amount of cool air entering the second opening. By controlling the inflow and outflow through the first and second openings, respectively, the amount of the fireplace by-products generated into the room where the fireplace is located such as carbon-monoxide, nitrogen dioxide, heat and moisture are reduced.

Abstract: A gas fireplace is provided having a plenum formed around at least a portion of the fireplace firebox. Room air enters the plenum and is heated by the firebox prior to venting back into the room. Two openings are provided from the outside of the fireplace housing to the plenum. The first opening allows heated air to exit the plenum, while the second opening allows cool outside air to enter the plenum. a mechanism is provided to control the amount of heated air exiting the first opening and the amount of cool air entering the second opening. By controlling the inflow and outflow through the first and second openings, respectively, the amount of the fireplace by-products generated into the room where the fireplace is located such as carbon-monoxide, nitrogen dioxide, heat and moisture are reduced.

Abstract: An integrated HVAC system for an automotive vehicle, including mating forward and rearward shells each have mating portions of left and right duct arms for delivering conditioned air therethrough. The mating shells define a central enclosure within which a drop-in heater core module may be operatively placed.

Abstract: The control system includes: a memory for memorizing a table of correspondence between inputs which comprise, on the one hand, sets of parameters and, on the other hand, operational adjustments of the working parts of the installation; an installation interface for instigating such adjustments; and a data unit having touch pads or other manual setting elements operated by the user so as to define a set of desired (or running) parameters. The data unit also has manual programming elements, and the memory includes individual zones for storing a set of parameters, each of these zones being associated with one of the manual programming elements, so that actuation of one of the latter stores the set of running parameters in the associated programming zone as a set of programmed parameters.

Abstract: An apparatus and method for heating and ventilating a farm enclosure. The apparatus includes an energy exchange unit for preheating fresh intake air delivered to the enclosure. The unit has a first air manifold on its upper end including a fresh air intake duct and an exhaust air duct. The unit also has a second air manifold on its lower end which has an intake section and an exhaust section. A turbulation baffle is held within the unit between the first and second air manifolds. The intake section of the second air manifold communicates with the fresh air intake duct of the first air manifold through a plurality of intake baffle sections. The exhaust section of the second manifold communicates with the exhaust air duct of the first air manifold through a plurality of exhaust baffle sections. The intake and exhaust baffle sections are arranged relative to one another creating heat exchange between the two.

Abstract: The present invention improves both the quality and the flow of air delivered by a ceiling fan. Ceiling fans provide limited indoor air flow, but do not function as air quality improvement apparatus. The present invention provides all ceiling fans with an ability to increase indoor air quality where they operate. One or a combination of a physical/chemical filter, an electrostatic particulate matter remover, a heating unit, and a secondary multidirectional fan provide consumers with air quality improvement options for ceiling fans to fulfill their specific needs for a given area.

Abstract: The present invention relates to a combined furnace and air recovery system. The system is comprised of a furnace housing having an inlet opening for connection to a cold air return duct and an outlet opening connected to a heating duct. A negative pressure compartment is located within the housing and is in communication with the inlet opening. A positive pressure compartment is also located within the housing and is in communication with the outlet opening. A fan is provided, communicating between the negative pressure compartment and the positive pressure compartment. a heating unit is located within the positive pressure compartment.

Abstract: The present invention is directed to a method and apparatus for growing poultry or other domesitcated fowl in an indoor environment. In particular, it is directed to an apparatus for efficiently heating and ventilating a poultry house and a method for using the same. Central to the apparatus and method is a unique energy exchange unit which uses the thermal energy of the exhaust air drawn from the poultry house to pre-heat the incoming fresh air supplied to the poultry house.

Abstract: Insulation assemblies for the HVAC industry are bonded by spray application of a hot melt adhesive composition comprising 10 to 50 percent of an isostactic thermoplastic polybutene-1/ethylene copolymer containing from about 5.5 to about 10% by weight ethylene; 20 to 50 percent of a tackifier; 15 to 50 percent of an amorphous diluent having a softening point greater than 90.degree. C.; 0 to 2 percent antioxidant; and 0 to 5 percent wax.

Abstract: An improved system for maintaining atmospheric conditions within prescribed parameters throughout the interior of a building. The building interior is essentially an enclosed system and sufficient outside air is admitted through air handling units to continuously maintain the interior of the building under a slight positive pressure throughout. Controllable vents are provided at strategic locations around the perimeter of the building, and sensing units are located throughout the building to continuously monitor atmospheric conditions such as temperature, humidity, and the level of particulates and pollutants. The sensing units or monitoring stations are periodically polled by a central computer, with signals from each station providing an indication of atmospheric conditions at that station. The signals representing existing atmospheric conditions are compared with stored data indicative of prescribed parameters for desired atmospheric conditions at the stations.

Abstract: A heating system for warming the space within a greenhouse or similar structure. The heating system comprises a heater means having a heating chamber for air, mounted in a plenum chamber. The plenum chamber is located below the base of the structure and is in fluid communication with the space to be heated. Means are provided to draw air from the plenum chamber into the heating chamber. Air heated in the heating chamber is passed through conduit means to the space. The heating system according to the present invention provides efficient space utilization and improved air circulation over conventional heating systems for greenhouse structures.

Abstract: Method, system and apparatus particularly advantageous for reducing the level of irritants and life threatening contaminants which exist in air within houses and other buildings the interior of which presents a relatively sealed environment. The embodiment illustrated exhibits ductwork defining a controlled flow path having an inlet or inlets arranged to communicate the interior of the living and/or working quarters of such a building with said path as well as outlet(s) therefrom to said quarters. Disposed in connection with said path are a blower for inducing a controlled flow of contaminated air from said living and/or working quarters to and through said path and series related temperature conditioning devices.

Abstract: A heat recovery unit for use in association with a fluid distribution system including: a heat exchanger; means to: circulate fluid through said system and to introduce fresh fluid across one end of said heat exchanger and into said system for mixing with the circulating fluid; ventilate a portion of the circulating fluid across the other end of said heat exchanger to transfer the thermal energy between said ventilated fluid and said fresh fluid so as to replenish said ventilated fluid with said fresh fluid.

Abstract: Fresh air make-up apparatus for a furnace located in an enclosed building comprises an elongated diffuser housing positioned adjacent the furnace, with the housing having an inlet in communication with fresh outside air and a pair of outlets, one being connected to the cold air return of a forced air furnace at a point substantially upstream of the heat exchanger, and the other outlet leading to the room. The outlet leading to the cold air return provides fresh make-up air for the building, while the opening leading to the room provides both a means for diffusing and preheating the fresh air supplied to the cold air return and a means for providing fresh air diffused with warm room air to the combustion in the combustion chamber of the furnace. The apparatus also includes a removable filter for removing contaminants from the fresh air. The apparatus can include a heat exchanger for preheating the fresh air with warm air from the warm air duct of the furnace.

Abstract: An air vent for supplying air for combustion to a fireplace or the like inside a building, the vent comprising a duct having an inlet end outside the building and an outlet end inside the building, a cover hingedly mounted over the outlet and pivoting between an open position and a closed position covering the outlet, the cover being sufficiently light that a pressure differential caused by combustion inside the building maintains the cover open. A tab, having a portion of hook-and-loop type fastening material, depends from the cover and a patch of mating hook-and-loop type fastening material is positioned adjacent the outlet end to engage the tab. The cover is sufficiently heavy that when the pressure differential drops the cover falls with sufficient force to engage the tab and patch, locking the cover closed.

Abstract: An air heating and ventilation system particularly suitable for well-insulated and draught-proof dwellings or buildings, there being provided a supply duct for fresh external air, connected to a main fan, a combustion chamber with an exhaust duct for the flue gases, an air heater disposed in the combustion chamber, a main distribution duct, feed ducts with controllable terminals for the rooms, a dirty air discharge duct provided with a fan, and a heat exchanger disposed between the supply duct for the outside air and the exhaust duct for the flue gases. The dirty air discharge duct is connected to the combustion chamber, so that dirty air at least in part acts as air for combustion and the remaining part is discharged together with the flue gases via the heat exchanger, the latter being adapted for transmitting the resulting condensate to the incoming external air.

Abstract: Supplemental ventilation apparatus is provided for manufactured housing whose window and door openings are tightly sealed when closed. Exterior air is drawn in by the furnace's room air circulating blower through a flexible duct flattened wideningly at its base to fit removably on the upstanding flange of a dampered inlet to the furnace's upper air inlet chamber, which is installed in the narrow top wall surface of the furnace forward of its accessory-mounting portion. When combined with an adequately powered attic exhaust system, negative pressure, which such exhaust system creates in the attic, acts through openings in the ceiling to draw off positive room air pressure. Thus stale room air is withdrawn and exhausted through the attic, without any increase in capacity of the room air circulating blower.

Abstract: A high frequency heating apparatus including a motor having a first and second windings, the apparatus comprising damper means for controlling the intake of air into a heating chamber and negative thermal expansion metal for moving the damper means in response to the changes in the shape of the negative thermal expansion metal means, the negative thermal expansion metal means being electrically coupled to the second winding of the motor.

Abstract: The regenerative heat recapturing device for the vertical insertion into a roof of a building or the like serving for the ventilation of space and recapturing of heat. It has a rotatingly drivable storage mass which is located partly in an intake air channel and partly in an exhaust air channel. Fan wheels are disposed in these channels. The storage mass is disposed in a storage mass ring through the inside space of which an exhaust air channel section and an intake air channel section lead axially which are always connected by way of a 180.degree. intermediate channel section with the channel sections of the exhaust air channel or the intake air channel containing the storage mass.

Abstract: An air control device includes a housing having an inlet and an outlet with fixed and movable plates extending across the inlet that both have indentically configured and spaced openings. The movable plate is moved by a room temperature-sensing device to control the amount of air flow. The outlet has a flow-directing vane for controlling the direction of air flow into a room.

Abstract: A room ventilator structured to define therethrough both a primary airstream and a secondary airstream arranged in heat exchange relationship with each other. A heat exchanger located to have both said primary and secondary airstreams flow therethrough is structured to divide both of said streams into numerous smaller partial airstreams with walls made of high thermal conductivity intermediate the partial airstreams to enhance the heat exchange capacity between the streams. The heat exchanger is designed so that it may be installed in the ventilator in a plurality of reversed positions without impairing its function.

Abstract: The invention relates to a motor vehicle with an internal-combustion engine, with a heatable payload space and with a pipe flowed by air and leading into the atmosphere, which is divided into two pipe branches. A first heat exchanger flowed by the waste gases of the internal combustion engine is arranged in one of these pipe branches, while a second heat exchanger is arranged in the pipe downstream of the conjunction of the two pipe branches. The latter heat exchanger is flowed on the secondary side by a liquid serving to cool the internal-combustion engine, so that waste gas heat can be transmitted to this liquid, or cooling heat can be discharged to the exterior, as a function of heat incidence and heat demand. In certain embodiments, two heat exchangers are arranged in series in the pipe leading to the atmosphere, one operatively interposed in the engine cooling water circuit, the other operatively interposed in the engine cooling oil circuit.

Abstract: A fresh air device is provided for a mobile home or other dwelling which has an attic and a furnace with an air blower for supplying conditioned air to the dwelling. The fresh air device includes a fresh air blower for supplying fresh, outside air to an air box within the attic, and an air dividing partition within the air box for diverting a first portion of the outside air to the attic and a second portion of the outside air to a duct, the duct being connected to the furnace.

Abstract: A cooling and heating air jet device in a building interior or exterior structure including a framework of hollow vertical and horizontal wall support members is disclosed. The framework of hollow wall support members forms an air duct through which cooling or heating air is passed. A selected one of the wall support members is formed with a plurality of air jet openings spaced in the longitudinal direction of the same. The hollow interior of the selected one wall support member is divided into two adjacent and parallel chambers by a partition wall having a plurality of communication holes spaced in the longitudinal direction of the same. One of the chambers forms a part of the air duct and a first pressure equalizing chamber and the other one of the chambers forms a second pressure equalizing chamber. The plurality of air jet openings are formed in the side wall of the second pressure equalizing chamber.

Abstract: An apparatus for controlling temperature in a unit type curtain wall for arraying the outside of a building wherein pipings within the body of the building can be minimized and the air conditioning effect at the window can be sufficiently achieved. The temperature control apparatus comprises vertical and horizontal frame members having hollow portions as air flowing passages through which conditioned air flows, wherein respective hollow portions of the vertical frame members adjacent to left and right and opposite to top and bottom at their respective one ends are respectively arranged at opposed top and bottom ends in such a manner of allowing them to communicate with each other only in relation to top and bottom by the interposition of cylindrical connecting members thereby forming vertically communicating air flowing ducts, respectively, which are independent of each other to left and right.

Abstract: The invention relates to a ventilating and heating apparatus for rooms of particularly high headrooms. It comprises one or more air-heating units and one or more room heating units. A feature of the apparatus is that the room is equipped with ventilating openings directed to the sojourn space of the room, injecting in summer and drawing in winter as well as with ventilating openings directed to the space under the ceiling, injecting in winter and drawing in summer.

Abstract: An improvement of the space heating system delivering a composite comprising of heated outdoor air, unheated outdoor air and recirculated indoor air into a building to counter a natural infiltration of outdoor air by modulating the composite air supply delivered to the interior of a building.

Abstract: A home heating system for supplying heated air and water is made up of a solar energy heating unit. The solar energy heating unit is provided with a channel in an insulating layer mounted within the housing, which channel directs heated air to the interior of the home. The interior of the housing also is provided with a plurality of water pipes for heating water. The water is preferably supplied from an indoor swimming pool and redirected back to the indoor swimming pool after being heated. A fireplace is also provided in conjunction with the solar energy heating unit, which fireplace acts as a back-up unit when the solar unit is not operable due to insufficient sunlight. The fireplace contains a conventional hearth and flue and is provided with a plurality of air conduits and water pipes within the flue so that the air and water may be heated by the fire in the hearth.

Abstract: A control system is disclosed for use in a restaurant having a forced air input air conditioning and/or heating system and a grill with an exhaust fan operating therewith. The invention includes an exhaust fan sensor means for monitoring the operative condition of the exhaust fan. A grill control means is provided for controlling the on/off operation of the grill. An air input sensor means senses the operative condition and the air flow of the air conditioning and/or heating system. A controller is connected for monitoring the sensors and for inhibiting operation of the grill upon an inoperative condition of the exhaust fan. The controller further inhibits operation of the air conditioning and/or heating system upon an inoperative condition of the exhaust fan thereby insuring the correct temperature within the restaurant. The invention may optionally include a stand-by power supply, a line voltage monitor and programmable thermostatic controller.

Abstract: A portable wall-like room divider rests on a floor and rises to a height of preferably at least three feet. Front and rear facings of the divider, in conjunction with edge and internal members, form a cavity in which a light source (two diverse light sources in an alternate embodiment) is positioned for producing reflected light which is transmitted through a hidden light-transmisive portion of the front facing for illuminating a designated task area of the room. An additional light filter can be added. An externally-located adjusting member is linked to the light source to allow adjustment of the position of a member of the light source so that the pattern of light passing through the light-transmissive member can be varied. The divider is brought into communication with heating (or airconditioning) ducts for dispensing heated (or cooled) air into the designated task area.