..monoxide alarm, window restrictors, seal windows... 1 hall, 1 landing , 10 year sealed battery ; Carbon monoxide alarms 1 OPEN FIRE install if none there ;; woodies 10 year battery alarm ;; supply and fit all.. window restrictor on windows ;; non lockable, cable, no key. ;; some windows taped because seals are bad . seal front door / back door also , seal is not meeting in corner of the door. 3 bed house . approx 80 sqm. 6 windows. radiators not heating.