In the United States, there are at least three organizations who have published workplace recommendations or standards for CO:
OSHA (Occupational Safety and Health Administration) has set the following enforceable standards: permissible exposure limit (PEL) for carbon monoxide is 50 parts per million (ppm) (55 milligrams per cubic meter (mg/m(3))) as an 8-hour time-weighted average (TWA) concentration [29 CFR Table Z-1].
NIOSH (The National Institute for Occupational Safety and Health) has established a recommended exposure limit (REL) for carbon monoxide of 35 ppm (40 mg/m(3)) as an 8-hour TWA and 200 ppm (229 mg/m(3)) as a ceiling [NIOSH 1992]. The NIOSH limit is based on the risk of cardiovascular effects.
ACGIH (The American Conference of Governmental Industrial Hygienists) has assigned carbon monoxide a threshold limit value (TLV) of 25 ppm (29 mg/m(3)) as a TWA for a normal 8-hour workday and a 40-hour workweek [ACGIH 1994, p. 15]. The ACGIH limit is based on the risk of elevated carboxyhemoglobin levels [ACGIH 1991, p. 229].
Some organizations cite medical problems arising from exposure to as little as 10 ppm, and have set much more conservative recommendations, typically giving 10 ppm as the level at which one should start worrying.
It's worth noting that a typical CO detector in an RV may not sound an alarm until CO level has been at or above the 50-100 ppm range for an extended period (hours).
lawrosa wrote:
IMO anyone would be best off with a wave olympian heater that also uses no electric...
I would probably get a wave 3 or 6 and hang it on a wall somewhere...
Wave 3 heater