CORGI strongly recommends the use of a Carbon Monoxide alarm. This is a device similar in appearance to a smoke alarm which detects rising levels of CO in the room and will sound the alarm if the concentration approaches a dangerous level. Remember though, you will still need to get your appliances regularly serviced. When you buy a CO alarm, make sure it meets current British and European safety standards, with the EN symbol clearly visible. The Honeywell Analytics SF450 meets every current standard and costs just over £36. However, Mayne Gas Heating Ltd are offering it to readers of our web site for the special price of £25 plus p&p.