The RegiDamper® is the answer when there is no access to the ductwork. It’s installed directly beneath the floor register. RegiDamper connects to the zone control panel with plenum-rated tubing that you can run inside the duct.
For best results, use RegiDamper where you have no other options, but stick to our EzySlide, EzyFit, or InsertaDamper where it’s possible. RegiDamper is the only Arzel damper without a gasket seal. There will be some bleed-by air with this damper. Still, it seals well enough to be a great option when there’s just one place where you can’t install a traditional damper.