I recently purchased a model 1775- 46,000 BTU Stainless Steel Propane Gas Commercial Patio Heater.
                    
                    It took a little time to put it together-even with the great instructions. However, it was definitely worth it. The heater puts out an even heat and covers our entire 32ft x 12ft deck. We sat out in 47-50 degree weather without any problems because of the quality of this patio heater. Not only that but it looks really classy too. The stainless steel is beautiful.