I have a 10' by 16' screened in patio in central TX. It can get cold, not up north cold, but with the wind at 15 - 20 mph it's cold. This heater has been perfect in allowing me to still enjoy a cigar on my back patio at anytime this winter! I would have given 5 stars except it comes with a small base, with bolts and stakes included, so that you can secure it so that the wind can't overturn it. I want to be able to move it around my patio so I had to have a 16" square metal base made to bolt to the bottom of the heater for a base. Also the ignition went out the 2nd time I lit it but it is so simple to light with my long nose bbq lighter I don't mind.