Please help me to channel into the walls just once... :-)


I want to install two or three mains smoke alarms, and interlink them
(so when one goes off, they all go off).

What type of smoke alarm is recommended for a hall way near a kitchen,
a den, and an upstairs landing?

As I'll probably put the wiring into the walls before buying the smoke
alarms, what cable should I lay to power and interlink all three
devices?

Cheers,
David.