@Nutman, thank you for reminding us of the necessity for ventilation when using a Mr. Heater. I believe that their instructions specify how many square inches of opening are required for various BTU settings.
The above holds true for any other iteration of a ventless heater involving combustion such as the Olympians.
@ Les1, it would seem like you should be okay with a Mr. Heater branded adapter hose. Nevertheless, the repair guy at our local propane shop reports that he still gets clogged Mr. Heaters in even when they use Mr. Heater's hose without the filter. They recommend to use a filter with any hose.
Another alternative is to refill your own one-pound propane canisters and swap them out when one runs out. I like this method as I can move my Buddy to the front or back of our 1575 without having to deal with a hose. And since there is no hose, the filter is a non-issue.
