Community: PassivHaus

PassivHaus is a standard of construction that yields extremely tight envelopes and low energy use.

The PassivHaus Institute is in Germany, but we have a branch here in North America as well, Passive House Institute US

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9 Answers

Single Story Passive Homes?

Is it possible to make a viable single story passive home? Most are two-story designs since you can fit more glazing on the south elevation with two floors.

The other question I have is can one find any "public domain" single story passive house designs to those who want a PH but can't afford to hire an architect to design one?

Asked By Peter L | Nov 23 13
3 Answers

How did you connect the heat pump to the ventilation system?

I am building my own home in central Maine using a double studded wall with 8" of Thermax between the studs. My heating contractor says I can't connect the heat pump to the ventilation system.

- art

Asked By Arthur Taylor | Nov 24 13
5 Answers

I need some help (advice on windows)

I'm in the process of building a new house. I am zone 6, I have the house orientated with lots of glazing on the south side.Trying to gain as much heat from the sun as possible. But i don't want to get cooked in the summer. I have external shading designed on that side. I have a R-20 under my slab, R-30 on my foundation walls, R-40 walls, and a R-60 cap. I am shooting for a .6 ACH at 50 pascals or less.

Asked By Kirk Nygren | Nov 21 13
1 Answer

Passive Solar & Thermal Mass

On the southern facing rooms having an exposed concrete slab works better for passive solar than a carpet covered floor during winter. Can one have too much exposed interior concrete or in other words, is too much interior thermal mass a bad thing?

During summer, is it beneficial to put down a throw rug of some sort to keep the sunlight from hitting the concrete floor and warming it? (Of course besides the exterior overhangs and window shades)

Asked By Peter L | Nov 2 13
2 Answers

High-solar-gain windows only on the south side?


zone 4/5 border. southern exposure faces ocean.

do we need high solar gain (.47 SHGC - ALMOST qualifies for Canada zone C, even) in all windows or just the south facing ones? Low E 180 glass...



Asked By pat rowland | Oct 30 13
25 Answers

PassivHaus backyard workshop

We're looking to build two sheds in our backyard. One is for storage of lawn-mowers etc and doesn't need to be insulated. The 2nd will be a workshop in which we will probably spend a reasonable amount of time. We're keen to do this as a sustainable showpiece highlighting various aspects of sustainability. We have thought of doing it as a PassivHaus project. As far as I know there are no complete, stand-alone PassivHaus buildings in Australia so this might be a useful demonstration site. A few things come to mind that perhaps some GBA folks could comment on.

Asked By David Coote | Nov 14 12
5 Answers

Wood frame wall details

welcome everybody

My question is, how good it will be wall like this:

from inside

1/ drywall
2/ service space for wire (like Swedish houses) -wood frame 2x2 (fill or not with insulation)
3/ vapor barrier (plastic)
4/ 2x6 frame with mineral wool -
5/ OSB 1/2"
6/ 6 -8" mineral wool
7/ thin coat silicate stucco

I don't have official data but winter is about 4-5 months with some -5°C to -10°C [23.0°F to 14°F] mostly, but can be -20°C [-4.0°F] for week or two.

Asked By peter abramowicz | Oct 4 13
6 Answers

A New York Times article on the Passivhaus standard

The latest New York Times article on the Passivhaus standard is called "The Passive House: Sealed for Freshness."

The article quotes Katrin Klingenberg, and interviews Don Freas, the owner of the Freas house that I described in one of my blogs, More Passivhaus Site Visits in Washington State.

The article also mentions GBA and the Pretty Good House. So check it out.

Asked By Martin Holladay | Aug 14 13
6 Answers

Vapor-open insulation systems?

We have are trying to insulate a historic masonry townhouse and extererior insulation is not an option.

Asked By Daniel Herskowitz | Jul 13 13
5 Answers

Could anyone suggest a fastener that would work well for attaching 6 in. mineral wool to the exterior of sheathing and studs?

Insulation: two layers of 3" Roxul Comfortboard IS
Wood sheathing and wood framed construction.
Two story residential project.

Asked By Rob Dapice | Jul 16 13
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