Always add in  carbon monoxide unit as well and test twice a year or every time your in the unit.  

$ 790Install three carbon monoxide detectors and two smoke detectors

The only one rebuttal I would have is about the absence of "white sandy beaches" not sure if this is a relative perception matter but all our island formations are formed from coral and other calcium carbonate materials.

If you're worried about carbon monoxide, put a CO detector.

@Ron Drake I was going to look at a commercial property in Ferguson, supposedly cheap, but it has a high carbon content and mentioned some rehab was probably needed, don't know, sounds fishy to me. 

My main reasoning behind this is due to Baltimore County's rental licensing requirements that are getting more and more strict on having carbon monoxide detectors throughout a rental unit.

Smoke alarms, carbon monoxide detectors and extinguishers are probably on the list.They will check inside and out..

Without it, the water heater could conceivably use up all the air in the closet, and either go out, or burn incompletely, creating carbon monoxide.In my current house, the water heater is in the laundry room in the basement, and if I shut the door to the laundry room, the room is "too small" according to the specs. 

hello all , my tenant called me and said that he smelled gas while using the stove and it set off the carbon monoxide alarm.

If you look it up, you will see that linoleum is made of made materials such as solidified linseed oil (linoxyn), pine rosin, ground cork dust, wood flour, and mineral fillers such as calcium carbonate, most commonly on a burlap or canvas backing.