I'll give you credit for one thing - you're gonna stick to your guns even knowing that the screen, as pictured, couldn't possibly be causing enough of a restriction to mean anything. Now inside the OAK tube might be a 10 foot long, 1" flex tube twisted into a knot, and I also don't like the intake being at the same height or above the exhaust. But I will not be conceding that a large mesh screen should be removed no matter how many times it's repeated.
![Stick Out Tongue :p :p](/talk/styles/default/xenforo/smileys/raspberry.gif)
I do wonder what the talk of Harman's sometimes being sensitive to OAKs and the talk of damper adjustments and vacuum measurements is all about.
![Smile :) :)](/talk/styles/default/xenforo/smileys/grin.gif)
It kind of fits into the Englander "OAK MUST be used" instructions - it seems stoves are optimized at the engineering level one way or the other.