This is a common question about this (and other) vent covers. None of the covers are tall enough for a vent lid to open 100%. However, most, including the Fan-Tastic # FVU1500WH, will open most of the way and allow 100% of air flow produced by the fan.
The tallest vent cover we offer is the MaxxAir # MA00-955001 in white, or # MA00-955002 in black.
You might also consider the MaxxFan Deluxe Roof Vent w/ 12V Fan part # MA00-07000K which is a fan with a built in cover. It's downward facing... view full answer...
While we do not have any suspension enhancements for the 2015 Dutchmen Denali, we do have some for the 2015 Ram 2500.
I recommend the SumoSprings Solo Custom Helper Springs, part # SSR-312-54. They have a capacity of 2800 pounds (more than enough for your Dutchmen's hitch weight), and they are compatible with in-bed hitches. I've linked to a video review of these springs for you to look at.
If you do not have a 2015 Ram 2500, let me know and I will find the proper springs for your vehicle. view full answer...
We have the Lippert Components Tandem Axle Lift Kit # RR23QX which will give your 2013 Dutchmen Denali and give you 2 inches of additional lift. view full answer...
Since your RV doorway measures 27 inches in width the correct SolidStep kit to get is the part # LC791574 as it fits a doorway width of 26 to 29-7/8 inches.
This kit also is designed for doorway threshold heights of 35 to 44 inches from the ground. view full answer...