I have fairly low ceilings and need both of these things to stick down as little as possible.
I heard somewhere that one of them "needs" to stick down a certain amount?
But have any of you sought or found a specifically "low profile" set?
Interlinking and mains powered preferred but I can work on that.
Tia
ED
Well, I have found you one, but you won't like the price.
https://www.ebay.co.uk/itm/Apollo-Soteria-Dimension-Specialist-Optical-Detector-Flush-Mount-Smoke-Alarm/202601809440?epid=12029352481&hash=item2f2c024620:g:JAoAAOSwpOVca9Aa
I searched for "flush smoke alarm"