Product D1201-OW and D1201-DOW are "from wall" high performance dynamic hearth dampers. They provide top quality performance in addition to a lower pressure fall well suited to the majority of business applications. Unique, inter-locking double skin blade structure removes combustible seals and provides flame defense under fireplace problems at temperatures https://heavydutystainlesssteelda80012.blogdemls.com/36938175/dampers-for-industrial-sector-for-dummies