Product D1201-OW and D1201-DOW are "from wall" high overall performance dynamic fireplace dampers. They supply top quality performance and a lower stress fall well suited to nearly all of industrial purposes. Special, inter-locking double pores and skin blade style gets rid of combustible seals and offers flame defense under hearth https://dampers-for-industrial-se12344.vblogetin.com/42884194/dampers-for-industrial-sector-for-dummies