I think ultimately that if my yet to be built envelope makes passivhaus cert with HRV but before the dog doors, before the wood stove and before the cook stove vent fan ~~ I will be very happy with the overall performance of the envelope.
I would expect any leakage around the OAK to be trivial, and right next to the wood stove. I will insist on the chimney being weather tight, but pin hole leaks in the telescoping flue between the firebox and chimney collar aren't going to break my heart. I got to keep the pipe swept without going up on the roof with 3' of snow up there and it's -20dF outdoors.
The wife and I do need to spend more time looking at cook stove fans. I just hate having cooking grease merely spread around the kitchen by a recirculating fan in the hood. I want a darn vent fan so i don't have to keep cleaning the cabinets every couple weeks. Already I cook all the meat I can outdoors rather than inside the house.
The dog doors are troublesome, but I want the dog to be able to go outside to potty without me having to get out of my chair. Explain the concept, demonstrate the door, educate the dog, get on with my life. Good boy!!
Pencil plans call for three man doors in the arctic entry, one to the garage, one to the back yard and one to the house, with two dog doors, one to the house and one to the fenced back yard. Wondering about having one arctic entry 12" before the floor level of the main house, and a second one 24" below the floor level of the main house, route the dogs through both.
If I made the lower one big enough and part of the garage slab I could maybe put a masonry heater in it with one face heating the garage overnight, and a second face radiating into the house. My wife parks outside at her office, reheating her car inside the garage over night every night is something I currently have to burn oil to do.
@John Ackerly , I don't know of an OAK that seals or doesn't seal well enough to make vacuum to meet passivhaus. I am sure it can be done. At my house, the seal between the stove collar and flue is NOT tight enough to make passivhaus either. I suppose it could be done, but once a vacuum tight oak/firebox/chimney is installed the only way to reliably clean that pipe and continue to meet passivhaus is going to be brushing from the top down no matter the weather- and sucking ash out from behind the cat is going to be problematic for the guy standing on the roof no matter how nice the weather.