Hardwired cause a lot of mess, floorboards up, chases, filling in etc. Wireless although more expensive to buy are a doddle to fit and easy to set up and if the system is to be added to with wireless is easy too.

Hello, search a company called AICO, they will give advice. Personally I would fit a LD2 system which will give you piece of mind. (Mains powered) thanks

Hi

I hope i can advise you on the safety alarms required.
You are as a landlord legally responsible for the safety of your tenants & therefore there is no cost effectiveness in this consideration; Only regulations.
Your local council private sector housing department will give you the directives on all safety fittings you are required by law to install & maintain.
You can also get great advice from ARLA, who are the association of letting agents, again providing advice on what you must do for your tenants.
I hope this has been of some help..

Mike @ Greenway