Model 0540V Wide Body Static Curtain Fireplace Damper is UL accepted to be used in which building codes require the protection of HVAC ductwork penetrations in vertical hearth separations (walls or partitions) that have a fire resistant rating of four hrs or a lot less. The 0540 is classed to https://dallaswoesg.blogozz.com/36090261/how-much-you-need-to-expect-you-ll-pay-for-a-good-dampers-for-industrial-sector