Well we have had a mains unit in the house for years never had an issue (Boiler serviced at interval same for gas fire,,,,.......
saw these in Asda
http://direct.asda.com/Lifesaver-Carbon-Monoxide-Alarm/001136302,default,pd.html
so for £8 i got one and stuck it in the door way between the 2 sides of our double garage since i have a calor heater in there and the like cant be too careful....
had my dads car running with the door open behind it 10 mins later this magic little box starts making a right song and dance.... given it only goes off at harmful / dangerous levels gave me the heads up to turn it off and get some fresh air... ...... just goes to show you cant smell CO some might find it a good little investment. for the house and or garage ........
saw these in Asda
http://direct.asda.com/Lifesaver-Carbon-Monoxide-Alarm/001136302,default,pd.html
so for £8 i got one and stuck it in the door way between the 2 sides of our double garage since i have a calor heater in there and the like cant be too careful....
had my dads car running with the door open behind it 10 mins later this magic little box starts making a right song and dance.... given it only goes off at harmful / dangerous levels gave me the heads up to turn it off and get some fresh air... ...... just goes to show you cant smell CO some might find it a good little investment. for the house and or garage ........