Cigarette smoke has all sort of noxious gases within it and it stinks. That’s why we don’t let people smoke inside. The point here is not about preventing someone smoking it’s about not poisoning your guests. I don’t believe anyone is at risk of carbon monoxide poisoning from cigarette smoking even if you chain smoked a full packet and kept all the doors and windows shut. A carbon monoxide detector is there to detect when appliances that burn carbon based fuels are faulty as incomplete burning results in CO production. The advice is to fit one to each room in which a carbon fuel burning appliance is located.
What the OP is rightly saying is that without carbon fuel burning appliances they has reduced the risk down to nil of poisoning their guests with CO. She is doing her bit for safety for her guests by not having any items that produce CO. So why would anyone insist on a CO detector for places such as this. It’s impossoble to comply with the rules for fitting them as if you don’t put them in rooms that dont have carbon fuel burning appliances.
Not only does this affect the ability to get a status that allows you to be business ready or part of plus programme but it places a black mark on your listing that no doubt puts off some people. Without the ability to explain visibly why there is not one fitted, the application of a blanket
policy only goes to penalise those that have actually gone the extra mile for their guests. It’s total nonsense and exhibits no common sense whatsoever.
Oh and smoke alarms don’t detect CO. Only joint smoke alarm and co detectors do that.