The Furnace feeds into an 8"x24" supply duct going east/west with a "Honeywell 8 in. x 24 in. TrueZONE Rectangular Parallel Blade Damper" on each side. The dampers are within inches of the furnace supply plenum. One direction is first floor/basement, and other direction is second floor. This is a simple dual-zone setup. I recently replaced one of the zone dampers due to a malfunction.
However, the old unit used to bleed air. So it was clear that the damper never 100% closed in the past, and only pushed the majority of the air to the other zone. The new damper blades close 100%, to the point that there is no bleed and the air comes roaring out of the other zone. I love this! However…. Is this a problem? Is there any concern of back pressure with one side fully closed? Anything else I should be aware of? The actuator appears to allow different levels of bleed.
However, the old unit used to bleed air. So it was clear that the damper never 100% closed in the past, and only pushed the majority of the air to the other zone. The new damper blades close 100%, to the point that there is no bleed and the air comes roaring out of the other zone. I love this! However…. Is this a problem? Is there any concern of back pressure with one side fully closed? Anything else I should be aware of? The actuator appears to allow different levels of bleed.
source https://hvac-talk.com/vbb/threads/2239184-Should-a-zone-damper-bleed-air?goto=newpost
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