Whelp, in a nutshell, since installing the OAK, the entire house maintains temperature much longer, since the stove is not sucking cold air through every knock and cranny it can come from.... House is no longer under a vacuum condition, like it was without the OAK..
One example.... My office door is about 10 feet from the stove, it has a 300cfm exhaust fan ducted out, also has a transom in the one upper corner for a 2nd story dryer vent chase, ducted out....without tearing down the drywall to be sure, I can only assume these two areas were not sealed and insulated quite like the rest of the room/office..
Before the OAK was installed my office would typically be 5 to 10 degrees colder than the the room just a few feet away, since the install about a month or so ago, my office is typically within 1 to 2 degrees of house temp, (depending on outside conditions)..
Ok, another example.... My garage is 30x62 attached to the house, I keep it heated with a gas wall mount heater (princess will be installed before next winter), the stove inside the house would also pull my garage into a vacuum trying to get air from the easyest places, like around garage door seals..... When it was really cold out my wall mount heater could'nt keep up..... Not anymore !!
The garage heater is set lower now, and maintaining temperature MUCH better, just like the main living space..
You don't realize just how much a wood stove is pulling until you put the adaptor plate on it and stick your hand next to it, even when having the stove cut way back !!
My .02 cents, your mileage may vary...