manufacturers instructions override ALL ,theory's ,superstitions,guesses ,opinions, science ,and newtons law ....Fact ! follow manufacturers instructions on where to locate co detectors !!!!
My Advise as always is to ensure ALL ,gas appliances checked by a qualified engineer ,at least once a year no exceptions !
Always observe any ventilation requirements of ANY fuel burning appliance including barbecue's wood burners ,oil burners etc etc !
Always use your fuel burning appliance for it's intended use !!
(a cooker hob is for cooking not warming your van up on cold mornings )
Invest in a sealed battery operated carbon monoxide detector , SF produce some good ones to higher than minimum reqd standards ! you dont need any fancy display or flashy lights ,they just ad to the price of the unit ,an audible alarm is all you need !
DONT use the cheep/free square disk /paper type carbon monoxide detectors / they are next to useless and wont save your sleeping families life !
If you change /swap gas bottles regularly and worry about gas leaks etc then get yourself a can of proper leak detection spray from any plumbers merchants fer a few quid ,it lasts ages and is one less thing to frett over !
Have a safe ,warm worry free camping season ! Mark
ps If you see me at a show and need advise i will for FREE ,visually check your gas appliances for you ,and give you my recommendations if required !