The Roost RSA 400 takes things further and, besides delivering every function of the Roost Smart Battery, it detects the usual trio: smoke, CO and fire and, additionally, it can also sense the presence of natural gas a unique addition for this type of detector. Even if the Roost RSA 400 could fit among the smart detectors, when compared with Halo Smoke Alarm, Onelink or Nest Protect, its design is pretty unremarkable. So, similarly to the traditional smoke detectors, the case of the Roost RSA 400 is circular, while towards the bottom, the body gets narrower and finishes into a larger, thin plate where the device gets in contact with the ceiling or wall. Since the plastic case is covered by a white matte finish, it will easily blend in on a ceiling it actually looks like a flush mount lighting and, since it is a relatively small device it measures 5. 63 x 5. 63 x 1. 75 inches, it won’t attract too much attention. On the top of the detector, there is a recessed zone on which resides an elevated button press to silence the CO/smoke alarm and hold it to test weekly, a CO/GAS indicator, a Power/Smoke indicator and four circular cut outs for the speaker. There are no other flashy design elements, such as a large LED light, so compared with other ‘smarter’ detectors, it may look a bit plain, but it does have everything one would expect from a smoke/CO/gas/fire alarm. If you decide to do it yourself, the installation process is not really that difficult: first, you need to remove the mounting bracket by twisting the main body of the alarm, attach it to the wall and you will now connect the three wires from the wall to the Quick Connector as following: black to the hot side of the AC wire, white to neutral and yellow, if you need to interconnect with other existing alarms the Power has to be turned off prior to this operation. Afterwards, insert the Roost battery, plug the Quick Connector into the Roost RSA 400’s base, reattach the body of the alarm to the bracket and turn on the AC power.

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August Schanz gründete mit anderen Meistern die Gewerbeförderungsanstalt, die als Berufsbildungs und Technologiezentrum in Frankfurt noch heute existiert.

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