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(1) Open the doors and windows to ventilate the area (see note).
(2) Turn off all fuel appliances where possible and stop using them. (The Alarm can be
silenced immediately by pushing the test/hush button provided the CO level <150ppm).
(3) Evacuate the property leaving the doors and windows open.
(4) Get medical help immediately for anyone suffering the effects of Carbon Monoxide
poisoning (headache, nausea), and advise that Carbon Monoxide poisoning is suspected.
(5) Ring your gas or other fuel supplier on their emergency number. Keep the number in a
prominent place.
(6) Do not re-enter the property until the Alarm has stopped. (If the Alarm has been
silenced by pressing the test/hush button, wait at least 5 minutes so the Alarm can
check that the CO has cleared).
(7) Do not use the fuel appliances again until they have been checked by a registered
installer or equivalent expert.
The alarm will stop once the CO has cleared.
Note: When ventilation is provided by leaving the window and doors open, the CO build up
may have dissipated by the time help arrives and the Alarm may have stopped sounding.
Although your problem may appear temporarily solved it is crucial that the source of the
CO is determined and appropriate repairs made.
4. What to do when the Alarm sounds
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