The problem with all heaters that burn fuel is that they consume oxygen.  
Personally, I wouldn't use one in a Rhodes under any conditions. Electric 
heat  is the only safe heat that I can think of, unless you go to installing a  
permanently mounted heater with a stack and fresh air source. 
I'm beginning to think that a lot of our owners are just wimps. Haven't you 
 people ever done any cold weather camping? Warm sleeping bags and cold 
weather  clothing are better than suffocating in your sleep from carbon 
monoxide  poisoning or setting the boat on fire. Yeah, I know. It sounds kind  of 
funny coming from a guy who stores his gasoline in the  lazzerette.
 
Rummy
 
 
In a message dated 11/19/2010 10:59:15 A.M. Eastern Standard Time,  
r22yankeeclipper at hotmail.com writes:

http://www.soundingsonline.com/boat-shop/new-gear/247092-heatmate-5200-p

>  ortable-alcohol-heater