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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26 Answers

Any good heat recovery options for dryer and range hood exhaust?

I saw mention of this in another question/answer session, but would like to hear more.
Any way to use Heat Recovery Ventilator for dryer exhaust?-Thanks.

Asked By matt berges | Nov 26 10
2 Answers

Passive house and sunshine hours

is there a ballpark rule of thumb that spans different regions for the mean monthly sunshine or possible percent sunshine that is conducive to a favourable result in PHPP?

Asked By erik olofsson | Apr 20 14
6 Answers

PassivHaus barndominium in Minnesota

Hello everybody. First post -- just signed up. Great site. I live 30 minutes north of the Twin Cities and I'm looking at building a passiv type haus. I've found the land I'm building on (10 acres) and have somewhat of a plan for the building.

My wife and I want to build a barndominium. Looking at 50x70 total with 30x50 two stories and 40x50 shop. I have a general idea of how I want to build but alas I am newb and was hoping for some insight with the pros on this site.

Thanks again and any advice would be greatly appreciated.

Asked By Ryan Picha | Apr 1 14
2 Answers

Shocked and dismayed by PHI Closure!

Not a question... just voicing my sadness at the news of Dr Feist closing the PHI.

It seems that "Wolfgang has left the building" albeit for one that has no interior volume and therefore no heating demand. Below is a quote from the announcement in Building Green. At least there is good news.

"Founding Sphere House Institute
Feist is turning his attention to a new project, he says, involving solid cubes of rigid insulation he has dubbed Sphärhäuser. The Sphärhaus Institut (SHI) promotes three simple metrics for its cubic structures, explained Feist:

0.0 m2 interior space

Asked By albert rooks | Apr 1 14
1 Answer

Green or LEED builders in zone 5B (Central Arizona)?

I'm building a home in the central part of Arizona (Sedona) in about a year. I'm currently under contract with a designer who appears to have some comfort and knowledge with Green/LEED design and is excited to design my home around these principals. He is somewhat reluctant, however, to give me names of builders he would recommend. I suspect this is because he doesn't wish to alienate any with whom he regularly works.

Is there a listing of builders in this area that are experienced with Green/LEED building principals?

Asked By scott schroeder | Mar 31 14
9 Answers

What is the best cold climate basement strategy?

We are building a new home in the Black Hills of South Dakota, about 20 miles south of Rapid City. The floor plan is nearly finished. The home is a ranch style with a partially finished walk out basement. There is a small loft area for an office above the mudroom/ laundry/ pantry. There will be about 4,150 sq. ft. finished. The home will face due south.

Asked By Tom Hanke | Feb 15 14
4 Answers

Envelope air tightness sanity check

Designing a "Contemorary Industrial Passiv Ranch Haus" for DIY build in SW Colorado (CZ6B). Working through data entry in PHPP now and I know the one level elongated ranch style is sub-optimal for PH design. It's 2250 ft^2 (OD) with conc. slab and shed roof. Floor/ceiling/wall envelope area is 6982 ft^2 and volume is about 25789 ft^3. An optimal PH two level cube would have envelope area of 4531 ft^2 and volume about 19125 ft^3. I'm over that by 154% and 135% respectively.

Asked By Chuck Jensen | Feb 15 14
1 Answer

A mix of building science, advanced products & FREE BEER!

Announcing PHnw 5!

The Northwest best mixture of building science presentations mixed with advanced product vendors in ventilation, windows, air barriers, water restive barriers, co2 heat pumps and all of the latest gadgetry to produce any type of low energy building enclosure: PH, NZE, LBC PGH.

Thursday March 29th: Advanced Classes (limited seating) (class info coming soon)

Asked By albert rooks | Feb 15 14
1 Answer

Airtightness and mechanical ventilation

What is the limit point, in terms of airtightness, that a residential retrofit needs mechanical ventilation (with heat recovery)?

Asked By ilais igoumenidis | Feb 2 14
4 Answers

PHPP software level of difficulty

There are a couple consultants in my area with whom I plan to speak and I was wondering if part of the consultant training includes learning this program and how good/proficient is one out of the gate? I would like to have calculations done for my 'near' passive house and need to know how experienced someone should be with this software? Is it crazy difficult? I've seen many questions about the software and its challenges and one consultant said it's 30ish tabs on an Excel document.

Asked By Lisa O'Donnell | Jan 5 14
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