We love to sit on our front porch but it gets chilly in the fall evenings. I have an infrared electric outdoor heater I want to use to take the edge off. I'd like to avoid drilling holes in the ceiling so I was thinking about putting a conduit pipe between the support posts as shown in the pic and hang the heater from the pipe (the heater is only 8 lbs).

The posts are just about 11 feet apart so the standard 10' pipes aren't an option. But I saw a video about the structural coupling and was wondering if I could use that to connect two pieces of 5 1/2" pipe to span the patio posts with a flange connector or floor flange adapter/hack.

Would 11' of 3/4" pipe sag? Do you think it would support the 8 pound heater and maybe a potted plant or two hanging from it?

I was thinking that I would use a conduit hanger fitting (upside down) to attach the mounting bracket of the heater.

Thanks all. I appreciate any input