Back porch in the winter

Happy to have found this thread (and apologies if my question is already answered somewhere in it ... I did not read through its entirety).

I borrowed two propane heaters from my neighbor over the winter holiday period b/c we were having a number of cigar smokers over for various parties. They worked well enough (winter’s been pretty mild here) but these were older models and seemingly not too efficient. I wonder if anyone would recommend a model they’ve found particularly effective? I’ve read some positive reviews about a model from Fire Sense that pushes out what seems like an astonishing 46,000 BTU, but the price seems almost too good to be true.

Any guidance/opinions would be welcome. Thank you.