Plug your Guardair into any wall socket and give it 200 seconds, the time the sensor needs to calibrate. That is it, your home is protected. No tools, no ladder, no complicated fitting.

Because carbon monoxide mixes evenly through the air in a room, almost any socket will do: in the bedroom, in the kitchen, in the hallway or in the living room. You plug it in, you are protected.

To cover a whole house, 3 to 4 detectors are ideal. Put one near the bedrooms, one in the kitchen, one beside your boiler, your gas heater or your water heater, and one more on every additional floor.

That way you are covered wherever you sleep, wherever you cook and wherever gas appliances are running.

PPM: how much carbon monoxide is in the air of the room. Zero means the air is clean. The higher the figure, the more CO there is. Guardair sounds from before 30 PPM.

GAS (%LEL): the percentage of natural gas or LPG in your air. Zero means no leak. Any reading above zero means gas is escaping somewhere. Act straight away.

Humidity: the humidity level in your home, shown as a percentage. The normal range sits between 30 and 50%. Enough to keep the air around you comfortable and healthy.

Three readings. One screen. Real numbers. No guesswork.

An ordinary detector shows you a green light. Guardair shows you real numbers.

• An ordinary detector sounds at 70 PPM. Guardair sounds from before 30 PPM.
• An ordinary detector only sees carbon monoxide. Guardair detects carbon monoxide, natural gas and LPG.
• An ordinary detector uses cheap level 1 sensors. Guardair uses level 3 sensors: faster, more accurate, longer lasting.

An ordinary detector leaves you guessing. Guardair lets you know.