Anybody have recommendations for sealing up the venting on a RV or Travel Trailer. I'm concerned about the breathing and exhaust vents on my refrigerator getting to much dust in them to breath. I was thinking something like a breathable barrier like Tyvek, something with a very fine weave but that s...

So how do you know what your time code is? I got the confirmation email at 2:20 that I got registered for STEP, and then got a second confirmation email at 2:23 which worried me why I got two and if they would remove me thinking I was trying to scam the system.