How make round 5" air duct valves? Answered
We moved into a large (for us) house, and we only use a few rooms. I managed to repair the furnace, but the first bill was astronomical. Beyond the leaking windows and lack of insulation, the problem is that, as it is, we have to heat the whole house. I've discovered a temporary method of blocking vent tubes to unused rooms (by stuffing the tube with a rag), but I want real valves. I've heard they are called air duct dampers.
My vents are on the ceiling aimed down.
So, I've seen these check-valve 5" ones https://goo.gl/8zRGLX but I haven't found any that would open and close manually.
But this doesn't seem like it would be difficult to make. I'm toying with the idea of using a cone-shaped "lid" with some kind of springy cord holding it in.
Does anybody have any ideas?
How do I make a manual (or electrical solenoid, I suppose) operated valve for a 5-inch round air duct?