You're right, Tim
Tim, I think the point you bring up is a very valid one, i.e., in boating sometimes we overlook the obvious -- and the perfectly-functional less-expensive -- in our never-ending pursuit of seeing just who can spend the most money on his or her boat!!!I've seen some of those small catalytic type heaters about which you are making reference and they are, as you point out, exceptionally functional and priced very competitively, ergo they are an oft-overlooked, affordable alternative to a permanent on-board installation.And, I apologize to all for being a little dogmatic on the issue of propane versus diesel/kerosene. The reason I appear so passionate on the topic is that I nearly lost some friends to carbon monoxide poisoning; an event that typically, as in most cases involving carbon monoxide, started off innocently enough. Had a group of us not planned a Sunday morning brunch and had our friends not been conspicuous by their absence, we would not have checked on them and they would have died. It was by purely sheer happenstance. So, I get on my soapbox a bit when I hear people start talking about using a potentially deadly heating source in an enclosed boat. I just happen to think that propane -- like gasoline engines -- aboard boats has gotten a bad rap over the years by a measly few bunch of ersatz, so-called experts who wouldn't know a shark from a tarpon if it bit them on the butt. As an experienced aviation accident investigator, I know that airplanes just don't suddenly and randomly crash. You can trace each event right back to the very first innocent-enough mistake that was the first link in the accident chain. A series of preceeding events ALWAYS accompanies an accident or an incident and the same is very true about all accidents, including those involving boats.No properly installed, properly maintained, used-as-directed system -- be it gasoline or propane -- aboard a boat has ever just spontaneously exploded. For instance, just how many folks -- before they crank the motor -- every uncover the thing and check for leaks, worn belts, dangling wires? Most will say, "Well, I always turn the blower on first?" How do you know the connections to the blower aren't sparking? It only takes a very small spark to cause a very big bang? Oh, I know; diesel doesn't explode, but all I'm doing here is illustrating a point.I never, ever crank up an airplane till I give it a thorough walk-around and preflight inspection before each and every flight. There has been numerous times over the years where flights have been delayed while the wrench-twisters did their magic because of something that was found.Ok, Ok...I know I'm soapboxing here again and I apologize. The only point I'm trying to make here is that we all have a responsibility to maintain situational awareness at all times so that our avocation remains safe. A stupid mistake by any one of us affects all of us.But, to the point of all this...diesel/kerosense heaters certainly have their place and in a lot of cases they are very efficient, high-output units that are economical to operate. However, propane is likewise a high-yield btu producer that is imminently safer than diesel/kerosene and should be, in my own opinion for whatever it is worth, the only heating fuel that should be used in confined spaces.Thank you all for indulging my sermon.