27/02/2026
After years of having to take their courage in both hands when crossing a busy road, MPs hurrying to vote were finally able to cross in safety when, on 9 December 1868, the first manually-operated traffic signals showing a red or green light at night were installed outside the Houses of Parliament in London. It would be another 60 years or so before they became a common sight though, with the advent of electric signals.
We’ve applied the same Traffic Light principle to our ECO-flow Stealth ultraclean ventilation (UCV) canopy. Helpful perimeter LED lighting changes colour to indicate canopy status:
🚦Green = UCV mode
🚦Amber = Conventional mode
🚦Red = UCV fault
🚦Blue = HEPA filter dirty
Thank you, JP Knight of Nottingham, inventor of the traffic light, for making our roads – and now our operating theatres – safer.
Introducing the flush-to-ceiling ECO-flow™ Stealth ultraclean canopyIt's our quietest canopy yet, but we want to shout about it! The ECO-flow Stealth works ...