Pipe portal curbs are used to provide a weather tight seal for pipes penetrating the roof structure. They are typically used for VRF systems. Three styles of pipe portals are available: boot style, hood style, or hood/boot combo style. The boot style can seal up to 5 pipes and diameters ranging from 3/8 in. to 6 in. depending on the boot. With the hood style, the pipe holes must be field cut and sealed in the hood face providing maximum flexibility and customization.