Abstract: A radiant heater adapted to fit on the head of a hookah. The heater uses one or more resistance ribbons to generate heat which is transferred to shisha in the hookah. The heater includes a chimney which surrounds the resistance ribbon and provides a chimney siphoning to remove heat when the heater is not in use and a heat transfer plate which includes one or more projections to vent excess heat. Air is drawn through the top of the chimney and is heated by the resistance ribbon. The heated air mixes with cool air drawn through a ventilation space below the chimney and the mixed air drawn through one or more vents in a heat plate. The heat transfer plate and hot air vaporize the shisha.

Abstract: An electric heating device a PTC heating element, a platelet-type PTC element which has two main side surfaces and face side surfaces extending perpendicular to the main side surfaces, and a casing. The casing forms inlet and outlet openings for the fluid to be heated and forms a circulation chamber in which a heat emitting surface of the PTC heating element is exposed and is coupled in a heat conductive manner to the PTC element. The PTC element is contacted in an electrically conductive manner by way of electrical conductor tracks to different polarities. A high degree of efficiency and a high output is obtained in that the conductor tracks are contacted in an electrically conductive manner to face side surfaces of the PTC element.

Abstract: A heater system for an electric vehicle that is void of engine coolant. The heater system can include an air duct having an opening into a passenger compartment of the vehicle and a heater unit attached to the air duct. The heater unit can have a self-contained quantity of oil within an oil reservoir and an oil channel in fluid communication with the oil reservoir. The oil channel can be located between a front wall and a back wall of the heater unit and the unit can also have an electric heating element at least partially within the oil reservoir. The electric heater unit can be operable to heat oil in the oil reservoir and thereby result in the oil flowing through the oil channel and heating the front wall and the back wall of the unit.

Abstract: A modular panel assembly is provided for encasing a space heater device or electric fireplace deliverable as a kit including panels and optionally a space heater device. The kit may be assembled to create a decorative encasing for the space heater device or electric fireplace. The panels may include front, top, and side panels. The panels may include brackets attachable to the space heater device and/or connectable with additional brackets attached to other panels. The panels may be constructed using wood. The kit may be assembled at a geographic location other than a manufacturing origin. A method is provided for assembling the kit.

Abstract: A heater is provided with a heater core having a source of thermal energy in a heat exchange relationship with a heat exchanger. A fan moves air through the heater core from an air inlet to an air outlet. The heater core is thermally insulated by an air jacket from an exterior case.

Abstract: A heater is provided with a heater core having a source of thermal energy in a heat exchange relationship with a heat exchanger. A fan moves air through the heater core from an air inlet to an air outlet. The heater core is thermally insulated by an air jacket from an exterior case.

Abstract: A convection wall heater with a power cord, including a heater body. The heater body comprises unit, an electrical control unit and an operating control unit. The heater body further comprises inlet holes and air outlet holes and an air convection chamber within the body. It is characterized that the heater body is provided with a power cord plug; the first end of the power cord is connected to the electrical control unit heating unit; the power cord extends to the outside of the heater body and the second end of the power cord is connected to the plug. The heater is mobile and can be used indoor with any power outlet by hanging it on the wall.

Abstract: A portable heating system includes a rechargeable power source and a heating element electrically connected to the rechargeable power source. The system may include a power management element configured to selectively electrically connect the heating element to one of the rechargeable power source and an external power supply to power the heating element to generate heat. The system may be remotely controlled by a transmitting unit in communication with a receiving unit via a wireless communication path. The receiving unit is configured to receive command signals from a transmitting unit and communicate with a controller configured to control activation of the heating element. The power management element may be configured to monitor incoming voltage of an external power supply used to charge the rechargeable power source and to terminate use of the external power supply when the incoming voltage reaches a cut-off level.

Abstract: In certain embodiments, a system for killing pests in an affected area includes a heat exchanger unit and an electric heater. The heat exchanger unit is placed within the affected area and is coupled to a faucet. The heat exchanger unit is configured to receive a flow of water from the faucet and to emit heated air by transferring heat from the flow of water to air flowing through the heat exchanger unit. The electric heater further heats the air emitted by the heat exchanger unit to a target temperature greater than 120 degrees Fahrenheit.

Abstract: A forced-air heater having a self-contained on-board electric-power supply that allows the forced-air heater to operate without an external electric power source; a fuel tank; a combustion chamber; a support; a housing including upper and lower housing portions; a motorized fan that during operation draws in ambient air through an air intake and forces air into the combustion chamber.

Abstract: A mobile device for heating rooms, comprising radiant elements, each provided with two heat-conductor plates associated with each other to define a central portion and connected fluid-dynamically with each other by means of connection elements. A heated heat-carrying fluid is able to flow in the central portions and, through the connection elements, from one to the other of the radiant elements in order to heat the surrounding room. Each pair of heat-conductor plates comprises lateral walls which are distanced from the corresponding central portion so as to define respective peripheral zones. The mobile device also comprises heat-insulating elements able to be applied due to having substantially the same shape so as to cover at least a part of the peripheral zones of the lateral walls.

Abstract: An integrated lamp and heater assembly comprises in one embodiment a table lamp and heater intended to be positioned on a table, such as an end table, coffee table, nightstand, or the like and in another embodiment a free-standing floor lamp and heater. The integrated lamp and heater assembly is intended to be positioned proximate to a chair, a bed or other area that is desirous of being illuminated and being provided with a supplemental flow of heated air.

Abstract: Electric Room Heater in its housing contains heaters which consist of strip of oriented cold rolled transformer sheet that are cooled by natural air circulation. Heater consists of two cross supports (11) connected by a central support (14). Between the cross supports are placed non-flammable insulating holders (13). The insulating holders have sprockets. Between sprockets lies strip of the heater of oriented cold rolled transformer sheet (12). The insulating holder (13) by its width (17) creates distance between layers of heater strips, and by sprockets width (18) makes distance between adjacent strips, windings, in the layer. These distances make channels for air circulation, thus enabling strip temperature to be less then 100° C.

Abstract: A heater is provided with a heater core having a source of thermal energy in a heat exchange relationship with a heat exchanger. A fan moves air through the heater core from an air inlet to an air outlet. The heater core is thermally insulated by an air jacket from an exterior case.

Abstract: A mobile device for heating rooms, comprising radiant elements, each provided with two heat-conductor plates associated with each other to define a central portion and connected fluid-dynamically with each other by means of connection elements. A heated heat-carrying fluid is able to flow in the central portions and, through the connection elements, from one to the other of the radiant elements in order to heat the surrounding room. Each pair of heat-conductor plates comprises lateral walls which are distanced from the corresponding central portion so as to define respective peripheral zones. The mobile device also comprises heat-insulating elements able to be applied due to having substantially the same shape so as to cover at least a part of the peripheral zones of the lateral walls.

Abstract: A portable heater includes a housing, a heating element incased in the housing, and a tool box comprising part of the housing. A method of providing heat and tool storage in a portable unit includes providing a heating element, housing heating element, and attaching a tool box to the housing thereby creating a unified tool box and heater housing.

Abstract: A U-shaped bolt including a closed end and two legs at an open end is self-retaining on a first object. The U-shaped bolt includes projections forming an opening to the closed end adapted to be smaller than the width of the first object. The projections retain the U-shaped bolts on the first object. The U-shaped bolt is used in conjunction with a space heater having a plurality of heating elements connected by channels. The U-shaped bolt is retained on the channels to warrant proper assembly of the space heater.

Abstract: A heating device includes a case having a plurality of openings and a plurality of slits are defined in bars of the case so that a plurality of heating boards are engaged with the slits of the case at an equal distance. A power control device is connected to the case and includes a power line having a plurality of male connectors. Each heating board includes a heating layer sandwiched between two isolation plates. Two wires are connected to the heating layer and each wire has female connectors, which are connected with the male connectors of the power line. The heating layers of the heating boards dispense heat evenly from the openings of the case.

Abstract: The present invention relates to a forced-air electric heater control system for HVAC systems. One embodiment utilizes two heat sensors which are positioned upstream and downstream, equidistant from the heating element(s). The control system, in this embodiment, takes the difference between the temperature signals, thereby eliminating any radiant heat factor, and the resulting signal is used to control the heater. In other embodiments, the method senses upstream and downstream temperatures, determines air velocity in the duct, determines the amount kilowatts (KW) or other heat per unit time or power based thereon, and enables the power control switch when the resultant is less than a predetermined value. Alternate systems initially test for air velocity by application of nominal power, and then use the measured velocity and the downstream temperature to obtain a control signal for the heater. A pressure differential may be used. The systems compensate for radiant heat factor.

Abstract: An electronic control circuit for use with a heater, a fan, a humidifier, a cooking apparatus, or any device utilizing a power mode switch and a condition sensor, and optionally time-automated switching of modes of operation. The circuit includes a single control switch to switch between operational modes and to select a level of operation. The circuit preferably includes an application-specific integrated circuit, to provide circuit logic. The single control switch, preferably a push-button switch, selects a mode of operation for a household appliance controlling a local environment, e.g., a humidifier or a heater, and the level of operation. The unit operates in the selected operational mode at the selected level, as indicated by either an energized light-emitting diode or a digital display. Operational modes may include a timed mode, a manual mode, and/or automatic mode for regulation of the environmental condition with a sensor included in the circuit.

Abstract: An electronic control circuit for use with a heater, a fan, a humidifier, a cooking apparatus, or any device utilizing a power mode switch and a condition sensor, and time-automated switching of modes of operation. The circuit includes a single control switch to manually set power output, to set a value for automatically comparing and responding to a sensed condition, and to set a time-automated sequence of operational modes. The circuit includes a microprocessor, preferably an application-specific integrated circuit, to provide circuit logic. The single control switch, preferably a push-button switch, selects a mode of operation. The circuit includes a thermistor or humidity sensor. The unit responds to the sensed condition, in accordance with the temperature/humidity value set by the control switch. The unit bypasses sensor operation in manual mode. In timed mode, a manual or automatic mode operates for selected time, followed by an automatic mode or powering off.

Abstract: A conventional radial electric warmer includes an upper and a lower support base, plural heaters, a protective net, and an upper, a front and a rear cover. The upper and the lower support base respectively have a fixing frame for the heaters, and plural holes for hot air to flow out. The heaters respectively consist of plural heating pieces secured at the outside of the upper and the lower support base with the fixing frames with bolts. The protective net is secured at the front side of the heaters, secured stably by the upper and the lower support base. The upper, the front and the rear cover are respectively secured at the upper side, the front side and the rear side of the upper and the lower support base. Further, two foot frames are fixed under the lower support base to keep the warmer standing on the ground. Then the warmer is very safe to use and highly effective.

Abstract: An electronic control circuit for use with a heater, a fan, a humidifier or any device utilizing a power mode switch and a condition sensor, the electronic control circuit including a single control switch for controlling both power output and responding to a sensed condition. The electronic circuit includes a microprocessor, preferably in the form of an application-specific integrated circuit to provide the circuit logic. The single control switch is preferably a push-button switch which places the unit in the selected mode of operation. The electronic control circuit also includes a thermistor or humidity sensor to sense conditions and, depending upon the set temperature/humidity by the control switch and the sensed condition the unit will operate accordingly. The unit can also operate in a manual mode, thereby bypassing the sensor operation.

Abstract: A system for supplying air to a discrete space to obtain a desired set point temperature within the space includes a plurality of units for conditioning the air in the space. Each of the units has an independent electric power supply cord for connection to a source of electrical power. One of the units includes a master control and another of said units includes a slave control. The master control includes a user temperature control to establish a desired set point temperature within the discrete space. Each of the units includes its own thermostat for sensing the ambient temperatures in the area of the discrete space immediately adjacent the respective units. Each of the units has its own communication device, which enables the master control on the one unit to simultaneously vary the operation of each of the units in inverse proportion to the sensed ambient temperatures to substantially uniformly condition the temperature of the air in the discrete space.

Abstract: An electronic control circuit for use with a heater, a fan, a humidifier or any device utilizing a power mode switch and a condition sensor, the electronic control circuit including a single control switch for controlling both power output and responding to a sensed condition. The electronic circuit includes a microprocessor, preferably in the form of an application-specific integrated circuit to provide the circuit logic. The single control switch is preferably a push-button switch which places the unit in the selected mode of operation. The electronic control circuit also includes a thermistor or humidity sensor to sense conditions and, depending upon the set temperature/humidity by the control switch and the sensed condition the unit will operate accordingly. The unit can also operate in a manual mode, thereby bypassing the sensor operation.

Abstract: A radiant electric heater is disclosed having an auxiliary reflector in front of a halogen lamp. The heater includes a ceramic base defined with clampling grooves for directly clamping terminals of the halogen lamp. The auxiliary reflector has a concave surface outline which faces a curved front end of the halogen lamp. The heater also includes a fastening member having one end which is affixed to the auxiliary reflector and the other end which is affixed to a center portion of the safety grill.

Abstract: An electric heater is provided having a heat source mounted in a reflecting plate, a safety cage at the front surface of the reflecting plate, a halogen lamp fixing plate to which a halogen lamp is fixed horizontally, another reflecting plate at a position corresponding to a central curved portion of the halogen lamp to reflect heat to the reflecting plate, and a fixing member between the subsidiary reflecting plate and the center of the safety cage to fix the positions of the plate relative to the lamp.

Abstract: A safe electrical heat energy generator which comprises a heater unit equipped with a set of systematically organized heat radiating metal fins. A feature of the invention is its reenforced compact structure in which a heating element arrangement and the heat radiating metal fin arrangement are manufactured as a single heater unit structure. In such a structure, a heating element is surrounded with an insulating layer and enclosed inside a central heat conductive tubing of the framework for the metal fin arrangement, thereby defining the major components of the heater unit. In this manner, the entire heater unit structure is the source of radiant heat energy, not simply the heating element itself.

Abstract: An upright radiant electrical heater has a reflector assembly supporting a vertically-extending heating element assembly that radiates energy through substantially 360 degree. The reflector assembly includes heat reflective panels that disperse heat horizontally over substantially 90 degrees through an open grill at the front of the heater and vertically in a substantially uniform manner so that hot spots are avoided. A fan forces room air into the heater from below the reflector assembly, upwardly through an air passage behind the assembly into an open control chamber at the top of the heater, and outwardly into the room through ducts along the top front edge of the assembly. A thermostatic control for the heating element assembly and the fan motor is located in the air passage at the top of the heater. The flowing air maintains the exterior of the heater relatively cool to the touch, allowing parts of the housing to be molded from a thermoplastic material into aesthetically-pleasing shapes.

Abstract: According to the present invention, an electric heater is provided which comprises a heating means mounted in a reflecting plate, a safety cage disposed at the front surface of the reflecting plate, a halogen lamp fixing plate having fixing holes to which a halogen lamp is fixed horizontally, a subsidiary reflecting plate disposed at a position corresponding to a central curved portion of the halogen lamp to reflect heat to the reflecting plate, and a fixing member interposed between the subsidiary reflecting plate and the center of the safety cage to fix the positions of the plate and the cage.

Abstract: Disclosed herein is a radiant heater with a halogen lamp. The heater includes a base connected to a power supply cord. A power shut-off switch is mounted on the bottom of the base. A support column is mounted on the top of the base and provided with a height control button at its upper portion. A retractable rod is inserted into the support column and supported by a spring. A neck is rotatably connected to the upper end of the retractable rod. A head is fixed to the top of the neck, the head including a reversible motor. An operating rod is fixed to the upper portion of the neck at its one end and rotatably connected to the rotating shaft of the reversible motor. A support projection is mounted on the front of the head. A reflector and a reflector cover are fixed between the head and the support projection. A lamp cover is fixed to the front of the support projection for distributing far infrared rays to the reflector and preventing the eyes of a user from being dazzled.

Abstract: A portable radiator has a radiator body whose radiating members are defined by first and second metal plates which together define central portions in which a heating fluid is displaced convectively, the radiating members communicating with each other through passages in the central body. A heating unit is provided in the central body for heating the fluid and an additional heating member is provided in seats formed by the heating members outwardly of the central body for heating air.

Abstract: The independently operating and mobile radiator including a body having a plurality of radiating members each defined by a first metal plate and a second metal plate mutually associated and by a central portion wherein heated fluid circulates at a temperature preset by a resistance, the radiating members are mutually connected through passage hubs for circulating the heated fluid inside said body, each radiating member has one region of its surface, external to the central portion, having a wall thickness equal to the thickness of the first and second metal plates.

Abstract: A portable heater operates at a first power rating to rapidly heat a space and a second power rating, lower than the first, to safely maintain the temperature of the space. The heater uses a first resistive heating element and a second resistive heating element which are configured to automatically supply the first power rating during an initial heating period then step down to the second power rating for continuous operation.

Abstract: An electric heater with a post and a heating member; which comprises an orientation device comprising a pole or spindle fixed on the post; a movable plate formed with front and rear holes and rotatably mounted on the pole or spindle through its front hole, carrying the heating member; a geared motor with a shaft extending downwardly through the rear hole of the movable plate; a transmission plate formed with mating teeth on the upper surface and rotatably fixed to the lower end of the motor shaft; a driving plate carrying a guide pin on or near its lower edge and formed with mating teeth on its bottom surface to be engaged with the counter part of the transmission plate; a spring mounted around the motor shaft under the movable plate for elastically pressing the driving plate downwardly; and an elongate guide path formed on the post for receiving the guide pin and allowing it to reciprocate straightly therein, for automatically and easily converting the direction of heat reflection of the reflector is disclos

Abstract: An electric heater includes a receiving chamber, heat sink members, electric heating pipes and a control portion. The receiving chamber and heat sink members are formed from extruded aluminum members. The heat sink members are sequentially arranged at both sides of the receiving chamber. The electric heating pipes are placed in the receiving chamber. The control unit activates an electric power source of the electric heating pipes in order to generate heat. Heat energy from the electric heating pipes is absorbed by extruded aluminum plates that define the receiving chamber. Heat energy is conducted quickly to the heat sink members which exchanges heat by convection with ambient cool air to rapidly raise the temperature of a room.

Abstract: A portable radiant heater comprises an electrically energized heating element extending along a vertical axis. A first, multi-faceted, concave reflective surface is positioned to the rear of the heating element. A second reflector is positioned forward of and in close proximity to the heating element. The first reflector directs radiant energy received directly from the heating element and indirectly from the second reflector forward with minimal radial dispersion.

Abstract: A space heater is disclosed, comprising a housing, a heat source within the housing and a plurality of openings to allow the convection of air through the housing, in which: the heat source comprises a pair of panels defining between them a closed compartment, a liquid within and partially filling the compartment and an electrical heating element extending within the compartment, substantially parallel to the panels and in thermal contact with the liquid; the compartment is sub-divided into a lower liquid chamber and an upper expansion chamber and the cross-sectional area of the liquid chamber where it meets the expansion chamber is less than that of the expansion chamber; and the openings in the housing allow radiant heat from the heat source to escape from the housing. In further embodiments, the lower liquid chamber contains liquid at room temperature, but the upper expansion chamber does not.

Abstract: A portable electric space heater having a power cord with a male electrical plug and having easily replaceable quartz heating elements so that an unskilled person can remove and replace a heating element with a minimum of time, tools and skill. The heating elements are removably mounted by sockets within the heater housing behind a grill. One edge of the grill is pivotally connected to the housing and an opposite edge is connected to the housing by a latch member formed on the grill. Access to the heating elements can be obtained by unlatching the grill using the male plug as a tool.

Abstract: An appliance includes a housing defining an air inlet and an air outlet facing opposite to the air inlet, an inlet detector for detecting objects in an inlet zone projecting away from the inlet and an outlet detector for detecting objects in an outlet zone projecting away from the outlet. Also included is a control for deactivating the appliance in response to detection of objects in either of the inlet or outlet zones.

Abstract: A portable electric heater including a housing having a bottom wall with front and back portions, a rear wall, a pair of side walls each having front and back portions, a top wall with front and back portions, a divider wall having a given area, and a front grill wall. The rear wall, divider wall and back portions of the bottom, side and top walls define a chamber while the divider wall, the front grill wall, and the front portions of the bottom, side and top walls define a cavity horizontally juxtaposed to the chamber. A plurality of elongated quartz heater elements and a temperature sensor are mounted in the cavity, and an electrically energizable fan is mounted in the chamber. Defined in the rear wall are a plurality of inlet openings, and in the divider wall are a plurality of discharge openings having a combined area equal to less than 2.5% of the given area.

Abstract: A heater, especially a portable electric space heater, that includes safety features selected from at least one of the following, which may turn off the heater or trigger an alarm or both: motion sensors for determining whether an object is within an unsafe distance of the heater; temperature sensors for determining whether the internal temperature of the heater is rising too fast, or is too much above ambient temperature so that it represents an unsafe condition, or is above a preset safe level.

Abstract: A portable heater providing both radiant and forced air heat includes a plurality of vertically oriented, horizontally spaced apart quartz heating tubes is partially surrounded by a common reflector configured to open at an obtuse angle at each quartz tube. The reflector is perforated to allow air to pass out from the interior of the heater. A housing surrounds the reflector and heating elements. A fan located toward the top of the heater draws air inward and down the channels behind the reflector from which it emerges past the heating elements. Control knobs for controlling a thermostat and output power level are located at the top surface of the housing. The heater also has automatic safety controls for shutting off power in the event the heater tips over or overheats, and an overcurrent device.

Abstract: A heater element assembly for an electric heater, with a first and a second spaced element support. The first spaced element support has a peripheral edge surface and first and second slots extending inwardly from the edge surface, and an aperture therebetween; and a resistive heating element including first and second coiled sections and a connecting section disposed therebetween. The connecting section includes a mediate loop portion, wherein the first and second coiled sections are disposed between and engage the first and second spaced element supports. The connecting section extends through the slots, and the loop portion extends through the aperture, to secure the resistive heating element to the first element support.

Abstract: A heater control for controlling operation of a heater switch (12) in an evaporative cooler having an alternative heater mode in which a heater element (40) is energized and part of the air flow is blanketed by a shutter (37) controlled by a slide (24) or other operator. The slide (24) has a cam face (25) which directly or indirectly compresses a spring (22) as the shutter (41) is closed, the spring (22) otherwise biasing the heater switch (12) to its open contact state, but when the spring (22) is compressed, the switch (12) reverts to its closed contact state to energize the heater element (40).

Abstract: An upright radiant electrical heater has a reflector assembly supporting a vertically-extending heating element assembly that radiates energy through substantially 360 degree. The reflector assembly includes heat reflective panels that disperse heat horizontally over substantially 90 degrees through an open grill at the front of the heater and vertically in a substantially uniform manner so that hot spots are avoided. A fan forces room air into the heater from below the reflector assembly, upwardly through an air passage behind the assembly into an open control chamber at the top of the heater, and outwardly into the room through ducts along the top front edge of the assembly. A thermostatic control for the heating element assembly and the fan motor is located in the air passage at the top of the heater. The flowing air maintains the exterior of the heater relatively cool to the touch, allowing parts of the housing to be molded from a thermoplastic material into aesthetically-pleasing shapes.

Abstract: A portable electric heater including a housing having a rear wall, a substantially planar front wall, a bottom support and a top wall. Retained by the housing are a resistive heating element and an electrical circuit for connecting the heating element to an electrical power source. The circuit includes a switch having a closed condition that connects the heating element to the electrical power source and an open condition that disconnects the heating element from the electrical power source. Included with the switch is a manually operable actuator projecting from the front wall and movable in a single motion between a stable first position producing the closed condition and a stable second position producing the open condition, and wherein the actuator is shaped and arranged to be moved into the second position in response to contact with a substantially planar surface.

Abstract: A heating element for an air flow comprises a channel shaped bracket including a base and side walls at right angles thereto within which is mounted a pair of mica sheets arranged parallel to the base and at right angles to the sides and connected to the sides by ribs longitudinally of the sides with transverse slots within which the sheets slide. Each sheet is wrapped with a heating wire formed into helical coils so that each side of the sheet carries a plurality of parallel helical coil portions with connecting portions wrapped over the edges of the sheet. The sheets are symmetrical and one is inverted relative to the other. Each sheet carries at ends thereof a male and a female connector of the blade and receptacle type so that the blade of one sheet engages into the receptacle of the other sheet.

Abstract: An electric heater with thermal self-circulation of the room-air which is heated by means of electric resistors (7) placed in the core (6) of the heater. The heater is made of three or four casing elements (1) at the corners of which vertical gables (2) form frames for air slots (3) through which some of the room-air flows into the heater where a vertical separation wall (4) partly conducts air through air slots (5) between metal sheets (9A) and (9B) to the core (6) of the heater and partly to the channel (8) between casing element (1) and metal sheets (9A) and (9B) which is open at its upper and lower end to vertical air-flow on the outside around the core (6) when electric resistors (7) are activated for cooling the outer wall surfaces of the heater.

Abstract: An electric convection space heater for placement adjacent to a wall includes a plurality of elongated electric heating elements positioned in an elongated housing having a front panel having an elongated cold air inlet, a back panel for placement adjacent to a wall and a top portion with a plurality of elongated heated air outlet slots. The heating elements are arranged to extend longitudinally in the housing below the outlet slots with the heating elements horizontally disposed in spaced apart stair-step configuration with each heating element being located at progressively lower elevations from the front panel to the rear panel. The outlet slots occupy a front to back dimension on the housing top portion which exceeds the distance between the front and back elements.