Nolan Kienitz Posted March 25, 2007 Report Share Posted March 25, 2007 1958 house, slab foundation, "hard pipe" HVAC ducts in slab with floor vents. (Mind you this is Texas ... NOT typical). Mechanical damper control in each floor vent with felt sealer to close off when there is no air movement from system. Anyone have any history? MechDamper.jpg Download Attachment: MechDamper.jpg 43.66 KB Link to comment Share on other sites More sharing options...
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