It may be that her landlord installed it wrong, but landlords (and homeowners) install an impressive number of things wrong, so a business that didn't depend on "amateur does X perfectly" doesn't sound like a bad idea to me.
It may be that her landlord installed it wrong, but landlords (and homeowners) install an impressive number of things wrong, so a business that didn't depend on "amateur does X perfectly" doesn't sound like a bad idea to me.
The Dance of Smoke Alarm Supplication can still apply to smart smoke alarms: https://www.youtube.com/watch?v=BpsMkLaEiOY
However in what scenario does a landlord install a £100 smoke alarm when s/he can install a £10 one though? No landlord I've ever had would have done this -- given that over here bills are paid by the tenant a thermostat is usually not provided.
Homeowners can at least move them when they realise they have installed them wrong.
And when the price falls to £30, as happens with these things, a lot more will do it.
Not even on fire, maybe people are smoking inside when they aren't suppose to be. Maybe someone burns their food commonly and that needs investigated before they burn the whole damn place down one time. I can see lots of reasons for that.