ALLEGRO Manhole Ventilation Passthru (MVP)

Introducing the first integrated manhole system that combines a low-profile air vent, a 90° elbow, and built-in mounting in a single unit. This system includes a collapsible duct for convenient entry, which can be packed into a compact storage bag and easily lowered into the manhole by releasing the drawstring. Once inside, the duct automatically expands to its full shape. Crafted from vinyl and polyester with a PVC coating, the ducting is heat resistant up to 180°F, complies with ASTM 227 standards, and is UL 94V-0 flame retardant. The manhole cover is designed to fit into a flat channel corner for added stability. Compact and lightweight, the MVP is constructed from Linear Low-Density Polyethylene (LLDPE) and is non-conductive. This unit is easy to store and ships in a single small carton, and it is also recyclable.