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...
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...
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...
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...