Allegro 9510-50 MVP Confined Space Manhole Ventilation Passthru

Allegro's new 9510-50 Manhole Ventilation Passthru is a really cool piece of equipment. It is a incredibly simple way to ventilate a space while at the same time still allowing access to the space for your workers. It is an excellent and less-expensive alternative to the Saddle Vent system. Allegro's Manhole Ventilation Passthru (MVP) is made with a low profile air vent for the manhole itself, a 90° elbow, and built in mounting. The length from the top of the Passthru to the bottom of the duct when fully extended is 62 inches. This unit features: a collapsible duct, for easy entry stored in a small storage bag that can be dropped down into the manhole with a quick release of the drawstring the Collapsible duct springs back into shape once worker is down into the manhole the ducting is vinyl and polyester with PVC coating and heat resistant up to 180° F the manhole cover fits into a flat channel corner for stabilization Compact, lightweight and made from Linear Low Density Polyethylene (LLDPE), this unit is easy to store and ships in one small carton. Recyclable. Please note: you can't detach the duct from the bottom and attach a longer piece. The duct is permanently attached.