IAMICHABOD wrote:
All good information so far I think,as for the vent cover that is an easy one.
First see what type vent lid you have using this

For long lasting vent covers Polycarbonate ones are the ones you want.
If you haven't done this before Here is a short video that will help you.
You may need a new seal that goes on the metal edge this will make it a tight seal This is what you need
Replace like this
Maxx Air covers are also a good Idea,mine have been on for 9 years and look good as new.
Might be a silly question, but when it comes to measuring for the right size, is there a specific way to measure? Is it from the inside of the opening or outside?