An air flow control unit for controlling air flow in a duct, comprising a damper, which is arranged to be installed to the duct, wherein the air flow unit comprises a measurement unit comprising at least two measurement areas so that one measurement area is arranged on different side of the damper in air flow direction than another measurement area, wherein each measurement area comprises at least one measurement probe having a measurement point for measuring pressure, the first measurement area is arranged on the inlet side of the damper, and the first measurement area comprises a first measurement probe having a first measurement point, and a first wall behind the first measurement point in air flow direction causing a change in the air flow at the first measurement area.

A damper system is configured for installation in ductwork including a duct supplying conditioned air through a register boot to a register vent. A damper is movable between a closed position and an open position. A control module includes a control module housing, a controller, a power supply and a transceiver. The controller monitors a remaining energy level of the power supply and transmits a first low battery message via the transceiver when the remaining energy level drops to a first energy threshold. The controller instructs the damper assembly to move to a predetermined position and to transmit a second low battery message via the transceiver when the remaining energy level drops to a second energy threshold.

Disclosed herein is an air conditioner capable of guiding air in a desired direction with an adjusted speed without marring the appearance to solve the above-described problems. An air conditioner comprising a ceiling-embedded type indoor unit configured to discharge air into an indoor room through an air outlet simultaneously sucking indoor air through an air inlet, wherein a air conditioner comprises, a main flap configured to guide a direction of air discharged from a air outlet in a preset direction, and a sub-flap configured to guide the direction of air between the main flap and the sub-flap in the preset direction, wherein a length of a main flap in a direction where air flows is longer than that of the sub-flap in the direction where air flows.

A variable air vent is provided. The air vent includes a housing that is mounted on a vehicle and has an open center. A ball housing is coupled to the housing and has an inner side surface that is formed in a curved surface. A ball configured has front and rear surfaces opened and a side surface that is inserted into the ball housing in a curved surface form corresponding to the ball housing. A first knob and a second knob are vertically disposed on the front and rear surfaces of the ball and a plurality of discharge range adjusting wings have a first rotating shaft that is integrally formed at one end of a flat plate. A first side of the first rotating shaft is inserted into the ball and a second side thereof includes a first wing gear inserted into the second knob.

A register for air-conditioning includes a plurality of fins in a retainer, each fin including: a plate-shaped fin main body; a fin shaft; and a coupling pin, the coupling pin rotatably inserted in a coupling hole of a coupling rod extending in an alignment direction of the fins, the coupling rod being in contact with the end face of each fin main body. The coupling rod includes a rod main body extending in the alignment direction. The coupling rod includes a circular disc portion which has a diameter larger than a width of the rod main body and which is provided around the coupling hole, and both side parts of the circular disc portion in a width direction of the rod main body protrude from the rod main body toward both sides in the width direction.

An air conditioner includes: a main body having an air outlet; a fan provided in the main body; a heat exchanger provided in the main body; and a first member rotatably supported on the main body and opening and closing the air outlet, wherein the first member includes a first casing having a first surface facing an inner side of the main body while operation is stopped and a second casing attached to the first casing; on the first casing, a recess is formed on the first surface and a protrusion protruding toward the second casing is formed, and the recess is positioned on an opposite side to the protrusion.

Disclosed herein is an air conditioner capable of guiding air in a desired direction with an adjusted speed without marring the appearance to solve the above-described problems. An air conditioner comprising a ceiling-embedded type indoor unit configured to discharge air into an indoor room through an air outlet simultaneously sucking indoor air through an air inlet, wherein a air conditioner comprises, a main flap configured to guide a direction of air discharged from a air outlet in a preset direction, and a sub-flap configured to guide the direction of air between the main flap and the sub-flap in the preset direction, wherein a length of a main flap in a direction where air flows is longer than that of the sub-flap in the direction where air flows.

A ventilation device including a housing including at least one horizontal louver and at least one vertical louver in an arrangement nested into each other in a cross over pattern; and a regulation device which controls at least one flow out direction, wherein the at least one horizontal louver and the at least one vertical louver are respectively supported in the housing so that the at least one vertical louver is pivotable about a vertical pivot axis and the at least one horizontal louver is pivotable about a horizontal pivot axis.

A damper system including a conduit body, a wall assembly, and a first blade. The conduit body includes an opening. The wall assembly includes a first wall and a second wall disposed in the conduit body extending across the opening. The first blade is disposed within the conduit body between the first wall and the second wall.

According to various embodiments, a single duct terminal unit includes an air inlet coupled to a casing that allows air to enter the casing, a heat exchanger disposed within the casing and downstream of the inlet relative to airflow entering the casing, a damper disposed downstream of the heat exchanger relative to the airflow entering the casing, the damper controlling airflow through an air outlet, and a control unit in communication with the damper, where the control unit adjusts a positioning of the damper based upon airflow through the air inlet and a requested temperature of airflow through the air outlet.