If you didn’t do it yet, read my article and watch short video presentation here: Where to install CO alarm
. Simply adopt those tips to the layout of your condominium.
Although this is not specified in any installation manuals and / or recommendations from the authorities you can place one of the Carbon Monoxide detectors nearby your bed / at the slipping pillow / head level. Other devices should be placed as described at the link above and in the manufacturer's installation manual.