The V-520 series vehicle-powered refrigeration units provide superior cooling performance in two different packages: nosemount and rooftop. The nosemount refrigeration unit is ideal for small to medium size insulated box trucks, while the rooftop arrangement is perfect for medium to large vans and body-on-chassis vehicles with reach-in side compartments. Only Thermo King offers a rooftop reefer unit with this much capacity in a slim line package (just 6 inches above the roof for non-standby units).