The adaptor gives a curved van roof a flat, stable surface for a 14"×14" fan, so you’re not clamping a flat vent onto a corrugated roof and bending the flange until it seats. It’s CNC-cut from UV- and fire-resistant expanded PVC and doubles as the cutting template for the roof opening. It fits Maxxair Deluxe, Pro Breeze, Fan-Tastic Vent, and Airplus Deluxe fans

By Platform

 • Ford Transit — One part fits the 130", 148", and 148" Extended wheelbases at all roof heights, with no configuration needed.

   • RAM ProMaster— One part fits the 136", 159", and 159" Extended wheelbases, with no configuration needed.

   • Mercedes Sprinter — Adaptors cover the 144", 170", and 170" Extended wheelbases across both the NCV3 (2007–2018) and VS30 (2019 and later) generations. The Sprinter’s roof rib pattern varies by wheelbase and generation, so you select yours, along with the ceiling bay position, at checkout.

The adaptors are available through Overland Mobile Installs and Camper Van HQ.