Greg Reinhardt and his son Devon started the HVAC on March 11th. Kind of a boring subject for photos, but here are some. The thing I was most impressed with was how complicated it was to find a route for all the venting that was needed. I had in my mind it was just the heating and cold air returns. But NO - I hadn't taken into consideration the vents for 4 bathrooms, plus shower in sauna area, plus two water closets, plus 2 dryer vents, plus 2 kitchen hoods, plus 2 gas fireplaces, plus makeup air for overall ventilation, plus a vent for the gas hot water heater, plus the intake and exhaust for the furnace. Altogether I have 18 holes in my walls!
Parts for the heating system.
The furnace has arrived
Furnace is installed.
Vent above the bunk room. The 2 pipes going accross the trusses are for the dryer vents. Of the 3 going with the trusses 2 are heat, and one is from the cooktop hood from upstairs. 
And here are the exhaust vents outside: l to r, main level cooktop hood, lower level range hood, powder room vent.
Now we are on the other side of the house looking into sauna changing room. The insulated pipes are for the bathroom/shower vents. You can see the actual vent for the sauna shower in the middle left. In the center is the can for the light and to the right the heat vent.
Those exhaust vents from the last photo are the ones lower on the house on the left - plus a makeup air vent. The PVC pipes in the foreground are for the furnace intake & exhaust.I think that if one winter day, I turned on all the fans in the house, bathrooms, dryers and kitcen hoods, the house would look like a mighty steam engine, with hot air coming out from every wall. Don't think I'll try it though!