P4D4 and P6D3 aluminum penthouses are attractive; architecturally appealing housings designed to exclude weather. They are ideal for roof-mounted air intake or pressure relief/exhaust applications.
 
All-aluminum welded structural framing and heavy alloy blade extrusions ensure lasting durability and appearance by providing sturdiness to the penthouse, enabling it to withstand heavy wind pressure and snow loads. The removable low profile cover is lined with fiberglass to prevent condensation and pitched to ensure water runoff.