600SL
Well-known member
I was having difficulty balancing out my heating system. The room with registers closest to the air handler were having some flow issues. I was measuring airflow with an anemometer type instrument shown. All of the registers had zero flow at the leading edge of the duct opening. The last three I was able to correct just by closing them down a bit. The first two actually had reverse flow at the leading edge and could not be fixed at any setting. The also were in the room that is running about 5° colder than the main garage so I needed to get these working right.
I did a small modification which worked flawlessly. I added a scoop just forward of the damper door with a nice radius-ed turn to direct the flow in the front part of the register. The result were that it went from the lowest flow register to the highest flow register. It also became the most well balanced register with 9 readings all withing 100 FPM of each other. Tomorrow I will do the second register in that room, but it works so good I feel like biting the bullet and doing the rest of them.
I did a small modification which worked flawlessly. I added a scoop just forward of the damper door with a nice radius-ed turn to direct the flow in the front part of the register. The result were that it went from the lowest flow register to the highest flow register. It also became the most well balanced register with 9 readings all withing 100 FPM of each other. Tomorrow I will do the second register in that room, but it works so good I feel like biting the bullet and doing the rest of them.
