Exhaust units

TDA

Exhaust unit with presence detection

Airflow activated by presence detection

The TDA exhaust units directly adjust the extracted airflow to the level of human presence detected in the room. The airflow level in “presence” mode can be adjusted at every moment according to the usual number of occupants in the room (1 to 4 persons per vent). When the room is unoccupied, the airflow is automatically reduced, allowing on average, savings of 50% on thermal losses due to ventilation. The TDA exhaust unit is particularly well suited for installation in offices or small meeting rooms. A relay version also enables the lights or other equipment to be switched on and off via infra-red sensor.

Presence detection: starts the basic airflow as soon as a presence is detected.

Relay version: version with output controlling a relay for switching on the light, alarm, etc. when presence is detected.

4 levels of adjustable basic airflows.

Operates on battery or 12VAC.

Simple maintenance: removable grille for easy cleaning.

Smile: you have been detected…

The presence module of the TDA is composed of a pyro-electric sensor that detects convergent infra-red rays through a Fresnel lens with a 100° angle of detection and 4m range. The infra-red rays concentrated on the sensor are continually analysed; as soon as a presence is perceived, a signal is sent to the electronic board which analyses it and then activates the motor controlling the opening of the exhaust unit shutters. The ‘basic’ airflow is started as soon as a presence is detected and the grille returns to the reduced airflow 20 minutes after the last detection. So, when the room is empty, heating energy is saved, up to 50% compared to fixed airflow ventilation with the same air quality.

Simple adjustment determines occupant number

A cursor makes it possible at any time to set the number of people in the office, which determines the basic airflow activated during the detection process (from 25 to 100 m3/h).

Exhaust unit		TDA 9V	TDA 12V	TDA 12V	TDF
Standard code		TDA874	TDA873	TDA930	TDF875
Airflow characteristics
Humidity sensitive		–	–	–	–
With boost airflow		■	■	■	fix
Boost airflow activated by presence detection		■	■	■	–
Min. airflow@ 100 Pa	m³/h	5	5	5	25 / 50 / 75 / 100
Max. airflow @ 100 Pa	m³/h	25 / 50 / 75 / 100	25 / 50 / 75 / 100	25 / 50 / 75 / 100	–
Acoustics
Sound power level Lw @ 25 m³/h – 100Pa	dB(A)	30	30	30	30
Sound power level Lw @ 100 m³/h – 100 Pa	dB(A)	33.3	33.3	33.3	33.3
Power supply
Battery 9V DC		■	–	–	–
12 VAC supply (integrated)		–	■	■	–
Characteristics
Weight	g	250	250	250	250
Colour		white	white	white	white
Material		PS	PS	PS	PS
LED detection signal		–	■	■	–
Output for relay connection* (relay = 6 VDC, lmax. = 100 mA)		–	–	■	–
Installation
Air duct compatibility	mm	ø125	ø125	ø125	ø125
Destination room		office / meeting room (1 TDA for 4 people) / toilets