An air purifying apparatus includes a humidity controller and an intake cooling separator including one or more shafts and an outer wall. The intake cooling separator generates airflow to obtain the humidity-controlled air. The intake cooling separator swirls the obtained air around a first shaft included in the one or more shafts, thereby generating a pressure difference between air included in the obtained air and around the first shaft and air included in the obtained air and around the outer wall, and the pressure difference cools at least a part of the obtained air, and the pressure difference cools at least a part of the obtained air. The intake cooling separator performs centrifugal separation of water droplets generated from the cooled air. The one or more shafts are rotated to generate the airflow, to cause the swirl, and to perform the centrifugal separation.

A fresh-air cooling system and methods of cooling a building structure with the same are provided. The system has an exterior interface assembly, a damper, a register, a duct, and a motorized fan. The exterior interface assembly is connected to the register by the duct and provides a flow path for air outside the building to enter the duct. The motorized fan is disposed in an attic of the building structure and pulls air into the attic from a living space to create a negative static pressure in the living space. The damper is positioned along the flow path from the exterior interface assembly to the living space and opens to allow air outside the building structure to enter the living space in response to motorized fan creating in the living space a negative static pressure that exceeds the cracking pressure of the damper. The cracking pressure of the damper can be adjusted to control the flow rate of outside air through the damper.

A wall exhaust vent (e.g., for a dryer or other HVAC system) can include a housing defining a vent opening, and one or more bumpers on or at least partially within the housing and configured contact a door of the wall exhaust vent in a closed position. The one or more bumpers can include a bumper body, and a magnet disposed at least partially within the bumper body that is configured to magnetically interact with the door of the wall exhaust vent to bias the door to the closed position.

A sprinkler head accessory includes an inner ring attached to a sprinkler head and an outer ring hiding the edge of a ceiling hole through which the sprinkler head passes. The inner ring has a partition portion facing the outer ring with a gap therebetween. A ventilation portion constituted by the gap through which the indoor side of a ceiling board and the back side of the ceiling board communicate with one another is provided between the outer ring and the partition portion.

A sprinkler head accessory includes an inner ring attached to a sprinkler head and an outer ring hiding the edge of a ceiling hole through which the sprinkler head passes. The inner ring has a partition portion facing the outer ring with a gap therebetween. A ventilation portion constituted by the gap through which the indoor side of a ceiling board and the back side of the ceiling board communicate with one another is provided between the outer ring and the partition portion.

A sensor-based ventilation system includes a sensor, a ventilation device, and a controller. The controller receives a first indication from the sensor related to toilet usage or a humidity level within a room. The controller also sends a first instruction to actuate the ventilation device to initiate or increase ventilation of the room based on the first indication. The controller further receives a second indication from the sensor related to the toilet usage or the humidity level within the room changing after sending the first instruction. controller sends a second instruction to actuate the ventilation device to stop or reduce ventilation of the room based on the second indication.

A four-device-in-one skybox dehydrator sauna wind-redirecting bungalow comprises: adjustable louver blades attached to side gutter beams for preventing rainwater from getting into the bungalow and adjustably controlling amount of sunlight that shines into the bungalow, chutes formed to the side gutter beams and end gutter beams, solar-rechargeable batteries installed within adjustable louver blades for powering led lights and saving costs of replacing non-rechargeable alkaline batteries and helping reduce carbon footprint, a solar panel mounted to adjustable louver blades for collecting solar energy to charge and recharge rechargeable batteries and saving energy costs associated with lighting the bungalow and saving costs of replacing with non-rechargeable alkaline batteries and providing freedom to place the bungalow away from a power outlet and helping reduce carbon footprint, panel frames, panel inserts inserted within the panel frames for enabling the bungalow to become a sauna and a skybox and a dehydrator and providing security and insulation and protection from wind within the bungalow, louver braces inserted within the panel frames for allowing the louvers to be rotated, flipped, and positioned to redirect wind direction and structuringly securing louvers, axis pins inserted within the louver braces for providing eight locking points to reposition and locking and unlocking and pivotingly functionalizing the louver braces, louvers attached to the louver braces for redirecting and blocking and reducing and sealing the bungalow to create a sauna and a skybox and a dehydrator, an inner-track insert slidably inserted within hook-sliding track for providing a smooth sound-dampening track for slide hooks to be inserted for securing a curtain or insect screen, a curtain removably hooked onto slide hooks for providing privacy and protection from harmful sun rays and wind and insects, an extending-and-retracting door for providing protection from wind and harmful sun rays and insulation from cold temperatures and security within bungalow, door-spool housing attached to door-spool-housing bracket for providing discrete storage and protection of the extending-and-retracting door, drain openings formed into the corner-posts, corner-post-base-plate covers slidably attached onto the corner-posts, corner-post base-plates secured to the corner-posts, sliding-door track attached to the corner-post base-plates, the panel frames interchangably and slidably placed into the sliding-door track, anchoring-screw holes drilled into the corner-post base-plates, and tube-screws screwed into the anchoring-screw holes for leveling bungalow when installed on an uneven ground sur

A four-device-in-one skybox dehydrator sauna wind-redirecting bungalow comprises: adjustable louver blades attached to side gutter beams for preventing rainwater from getting into the bungalow and adjustably controlling amount of sunlight that shines into the bungalow, chutes formed to the side gutter beams and end gutter beams, solar-rechargeable batteries installed within adjustable louver blades for powering led lights and saving costs of replacing non-rechargeable alkaline batteries and helping reduce carbon footprint, a solar panel mounted to adjustable louver blades for collecting solar energy to charge and recharge rechargeable batteries and saving energy costs associated with lighting the bungalow and saving costs of replacing with non-rechargeable alkaline batteries and providing freedom to place the bungalow away from a power outlet and helping reduce carbon footprint, panel frames, panel inserts inserted within the panel frames for enabling the bungalow to become a sauna and a skybox and a dehydrator and providing security and insulation and protection from wind within the bungalow, louver braces inserted within the panel frames for allowing the louvers to be rotated, flipped, and positioned to redirect wind direction and structuringly securing louvers, axis pins inserted within the louver braces for providing eight locking points to reposition and locking and unlocking and pivotingly functionalizing the louver braces, louvers attached to the louver braces for redirecting and blocking and reducing and sealing the bungalow to create a sauna and a skybox and a dehydrator, an inner-track insert slidably inserted within hook-sliding track for providing a smooth sound-dampening track for slide hooks to be inserted for securing a curtain or insect screen, a curtain removably hooked onto slide hooks for providing privacy and protection from harmful sun rays and wind and insects, an extending-and-retracting door for providing protection from wind and harmful sun rays and insulation from cold temperatures and security within bungalow, door-spool housing attached to door-spool-housing bracket for providing discrete storage and protection of the extending-and-retracting door, drain openings formed into the corner-posts, corner-post-base-plate covers slidably attached onto the corner-posts, corner-post base-plates secured to the corner-posts, sliding-door track attached to the corner-post base-plates, the panel frames interchangably and slidably placed into the sliding-door track, anchoring-screw holes drilled into the corner-post base-plates, and tube-screws screwed into the anchoring-screw holes for leveling bungalow when installed on an uneven ground sur

A work facility that is capable of adjusting an air volume without a work defect and saving energy. The opening degree of an air volume adjusting damper corresponding to a filter booth for which the individual air volume measured by a corresponding individual flowmeter is the smallest among the respective individual air volumes for the filter booths is adjusted to a completely open state, whereas the opening degree of any other air volume adjusting damper is adjusted to such an opening degree that the individual air volume for the corresponding filter booth as measured by a corresponding individual flowmeter is equal to the smallest individual air volume, and a gas discharge fan is adjusted by a total air volume adjusting mechanism so that a total air volume measured by a total flowmeter is equal to a predetermined target total air volume.

A device for controlling air flow in an air duct comprises a rotary, profiled damper, a fan or turbine, and an actuator. The profiled damper comprises two rotatable integral canopies, a central opening therebetween, flat ribs extending outwardly from the canopies and towards an interior of the air duct, wherein an axis of rotation of said canopies coincides with an axis of rotation of the profiled damper and the canopies are arranged on the opposite sides of the profiled damper. The profiled damper is characterized in that the actuator is configured to reverse a position of the profiled damper, thereby reversing a direction of an air stream generated by the fan or turbine.