[replacement for firex 4899]

will i need an electrician to do this work or can i do it myself if electrical supply is isolated at fusebox.

[replacement for firex 4899]

Thanks, but is it a like for like replacement or will it need re-wiring ie will it fit existing base plate and is the connector the same

[replacement for firex 4899]

I have just purchased a flat in a 5 storey residential block. The firex 4899 detector on the ceiling is date expired.

What model now replaces this and will it fit using the old base place and connector. If base plate and connector

need changing ,then who do i need to change it. 

Can i just replace it with a battery operated stand alone device.