My apartment complex elevator has these smoke screens, they deployed during two planned power outages last year. There were some half dozen "food on the stove" fires caused a lot of smoke setting off the fire alarm last year. It was odd I don't recall the screens deploying. One incident they ought to have....... the sprinkler in one unit deployed where the "grease fire was.Caused major flooding water damage.
@TheTheo58 these screens, depending on the Jurisdiction, only deploy when the smoke in front of the elevator go into alarm. The individual smoke is on a relay base and triggers the screen drop, when the smoke detector clears the relays changes back and the screen rolls back up.
@@xavierkober7099 I thought this was reason they did not deploy since the smoke was nowhere near the elevator. Seemed odd it deployed with the outages, the screens rolled back up once power was restored.
@TheTheo58 that is because they are power safe. It requires power to keep the screen open, that way if power drops and a fire starts in the lobby the screen is already protecting the elevator shift from becoming a chimney and feeding the fire.
@@xavierkober7099 that is good engineering, power dependent power fails back up takes over drops the screen and does prevent the hoist way from becoming a chimney. This building was constructed about 9 yrs ago.
