So, the upstairs will be warmer than down below, even if the bulk of the warm air comes out down there.In cooling season, the reverse is true.

There are a couple of things I'd like to share and hope you find it helpful.1) Being accredited is cool, but it also means you're on your own if you lose all of your invested money.

BP is cool and fun to ask questions but this is not nearly enough to learn it all.

Okay cool, I was looking at them.  

Many people rent out rooms, apartments or homes nightly without going through proper channels but I wouldn't do it without having a good plan-B, in case your neighbors are not really cool with it. 

I stumbled across a website that seemed to have an pretty cool program, it was a Saturday Morning Investment Tour (http://www.gimmeshelter.com/saturdaymorninginvestmenttour.html) .

Since the new lending rules have taken effect, I have heard that my price range has cooled down a bit.  

Pretty cool.

I would not expect such a significant downturn this time around, but it might be best to keep looking until the market cools a bit.  

While most Net Zero buildings are energy efficient, perhaps even highly so in comparison to minimum building code requirements, there is nothing requiring them to anywhere new the efficiency level of a Passivhaus   .... this is why you will see odd things like warehouses with large rooftop solar installations being able to claim Net Zero.On the other hand, Passivhaus sets three metrics which a building must meet to be certified as Passivhaus compliant:  The building must have a heating and cooling demand of not more than 15 kWh/m2 (4,755 BTU/sq ft; 5.017 MJ/sq ft) per year  and a peak heat load of 10 W/m2.Total primary energy consumption (energy for heating, hot water and electricity) must not be more than 120 kWh/m2 (38,040 BTU/sq ft; 40.13 MJ/sq ft) per yearThe building must not leak more air than 0.6 times the house volume per hour (n50 ≤ 0.6 / hour) at 50 Pa (0.0073 psi) as tested by a blower door.Ironically, the research and pilot projects which fuelled what eventually became the Passivhaus standard was carried out in Saskatchewan as a National Research Council (NRC) project in the 1970s (the house is still in use today) and a similar project (Minnesota?)