Wireless heat detector

[growler]

I plan to add a wireless heat detector to an existing interlinked smoke system consisting of 2 smoke alarms. Can anyone tell me if I need 3 wireless radio bases or 2? I plan to use aico if that makes any difference ?
cheers !

 

[bigspark17]

Only 2. One on your heat and 1 on either existing smoke whichever is closest.. Then 240v feed to base also off lighting.. If diferent mcb to other smokes will need marking on db.

 

[growler]

Does the new smoke have to be mains or can it run from battery ? Thanks

 

[bigspark17]

Mains.! I dont install battery only!

 

[tazz]

If the existing are mains/battery (Grade D)...then you must install the same to keep Grade