Having worked in Anaesthetics and Intensive Care for some 40+ years I have some experience in this field and using the gas burners in the California is a much greater risk than using the Eberspacher Diesel Heater in the California.
A monitor is of use, but not infallible. Ventilation is more important.
Oh, and just to put the record straight, CO is produced naturally in the body, whether you smoke or not.
" In biology, carbon monoxide is naturally produced by the action of
heme oxygenase 1 and 2 on the
heme from
hemoglobin breakdown. This process produces a certain amount of
carboxyhemoglobin in normal persons, even if they do not breathe any carbon monoxide. Following the first report that carbon monoxide is a normal
neurotransmitter in 1993,
[14][15]as well as one of three gases that naturally modulate
inflammatory responses in the body (the other two being
nitric oxide and
hydrogen sulfide), carbon monoxide has received a great deal of clinical attention as a biological regulator. In many tissues, all three gases are known to act as
anti-inflammatories,
vasodilators, and promoters of
neovascular growth.
[16]Clinical trials of small amounts of carbon monoxide as a drug are ongoing.
[17] Too much carbon monoxide causes
carbon monoxide poisoning."