I give up, in my search for an external vent cover I've only found instant trash out there.
Have an Arietta CHN001MX30 or CHN001MX36 stove top vent that goes straight out the external wall.
Two problems, the installer [unavailable now], placed the vent so low, you hit your face on its edge while working at the stove! OK, move it up, which brings to the next problem....
The original vent hole goes through 2x6 exterior wall and is covered with a cheap plastic grill cover. The house set empty for approx 1 year before we bought. During that time the poor method of vent cover resulted in the desert winds blowing the kitchen area full of fine red dust - everywhere!
So what I need is a high quality vent cover that closes when not in use.
The waste of money products I've seen so far are absolutely amazing. Everything from tin flap that will rattle in a wind and not even keep closed either. To one that is an apparent attempt at better performance: with padding and screen wire, but NO POSITIVE CLOSURE, still just a flap with no force to keep it closed in the closed position.
Something as simple as adding a cantilevered weight to one of these cheap flaps would be better. Hold tight(er) in closed position and once starts to open, very easy to open as the weight applies less closing force. Or, should I patent this?
So question: where is best source of good vent cover?