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There are three main types of monitoring contract, and all involve your alarm connecting to a call centre if a sensor or detector is triggered. In all cases, you pay a monthly or annual fee, and then the monitoring company will take action when the alarm goes off. Next we will see the alarm's settings screen on which every individual alarm has its own settings - ring tone and custom message. These settings are automatically saved when the alarm starts. All of the major manufacturers (Aico, FireAngel and Kidde) make smoke and heat alarms that will work in combination with one another and we have tested pairs of smoke and heat alarms from each of them.

Give your alarm a title under Alarm name. This will be your alarm message or a reminder that appears on the screen when you start the countdown (optional) A number of alarm installers we spoke to didn't believe monitoring contracts with nominated keyholders are any better than having a dialler, especially as there's an annual cost involved. The Mînut comes with three levels of subscription – Standard for multiple users, Pro for property management, and Enterprise for tailored solutions. Setting up the SimpliSafe system is refreshingly easy: just plug in the Base Station, place it on a table and reach for the battery-powered keypad, which lets you connect the Base Station to your Wi-Fi and set up each sensor in turn via a single tap of a button. Now place the camera and the battery-powered window, door and motion sensors in strategic areas around the home and you’re all set. The accompanying Android/iOS app is really comprehensive and allows you to receive alerts and make further adjustments to the system.Ionisation alarms ionise the air between two electrodes. These are positively and negatively charged, creating a small current inside the chamber. If you have a large home with a lot of valuables, this might be worth considering. For most people, though, this is rather overkill for their needs. Maintaining your home alarm We love that it comes with internal and external sirens and that the 200m range of the system also makes it effective for garage and shed protection. The wide range means that this is a system ideal if you need to protect a larger property. With most monitored alarms, though, both the alarm itself and the installation must conform to certain standards – and that means you probably won't be able to install it yourself. On test, the 93db siren built into the hub went off without a delay when anything triggered the window, door or motion sensors – as alerts are beamed to your smartphone. Like most of the kits on our list, installation is easy and mostly wireless, although the hub pairs via the ethernet port on your home wifi router to enable a secure connection.

On a lighter note, Google’s data also revealed that the day when smoke alarms are most likely to sound in the UK is pancake day. Is the Nest Protect smoke and CO alarm suitable for homes in Scotland now that the law has changed?

You will usually need a central hub that connects to all other compatible devices via wi-fi, in the same way that a standard alarm connects to sensors around your home.