I am looking at heating options for a screened porch (wall or ceiling mounted) - doesn't need to heat in the winter, just something to take the chill off. The main option out there seems to be infrared heaters - most of them don't have great reviews and have an orange glow from the bulbs.

I did find an australian company named thermofilm that makes infrared outdoor heaters with no glow - but they are expensive and can only be purchased online, meaning returning it would be difficult. There also don't seem to be many reviews of the product either.

I'm curious if anyone here has found a good product that has worked for them? The screened porch will be 11x21, and I realize that most likely more than one unit will be needed to heat that area and most likely need to be strategically placed to heat seating areas.