Thanks for the info. Maybe I will call the company and explain the situation, see what they have to say. It should be under warranty.
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Well, I was also planning to run the Big Buddy heater for longer periods if need be. It's designed for that purpose and has a built in low oxygen sensor. I don't know, I just feel that an oven is not designed to be a space heater. You're probably right though, no more sketchy than the Buddy heater.
For anyone that was following this thread and who was curious - the installer came by last month and changed the regulator. The employee noted that they had received a few complaints about certain regulator models. He also mentioned that there was a bit of debris in the regulator connector. Everything is working perfectly now, and I noticed that the flame out of my propane stove does seem to be a bit higher, so I think the pressure out of the old regulator might have been on the lower side of acceptable.
I also tried getting my Big Buddy heater to run off of the central propane system. While it took a long time to purge the air out of the line I used to connect to the central system, I was able to get the Buddy heater going. Come the fall, I will probably request a fill-up on my tank, and apparently they can put some methanol in there to reduce the chances of any freezing over the winter. I hope everything works out this fall/winter!
Some (not all) Big Buddy propane lines require an inline filter as the lines can shed some fine debris which will eventually clog the heater. I think there is info on the Big Buddy website about which lines require the filter.