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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6 Answers

Does this setup seem sufficient?

After reading many of the articles and comments here, I've been inspired to try and build Passive House insulation and air tightness.

I'll share what I'm thinking so far with the hope that maybe you can direct me in any way. Not necessarily trying to get Passive House certified, but would like to build airtight anyway.

Region: west mountains of Dunlap, TN


Asked By Edwin Perdomo | Nov 23 15
1 Answer

Are there any pre-designed house plans that feature ICF walls & SIP roofs?

Looking to see if there are any plans out there that feature ICF walls and SIP roofs? Or is this something that has to custom designed by an architect?

Asked By Peter L | Sep 28 15
49 Answers

PassivHaus Clothes Dryers?

I would like to learn more about how those building to the PassivHaus airtightness guidelines deal with the clothes dryer.

I did some internet research, but couldn't find much information on the CFM rating for clothes dryers. I'm assuming they are rated at 200 - 400 CFM, depending on the size the of the dryer. With the current trend toward bigger appliances, perhaps it's even larger than that . . . I don't know.

For a house built to 0.5 ACH50Pa, does this throw the system off balance? Do clothes dry? Is there enough air exchange?

Asked By Daniel Ernst | May 3 10
28 Answers

Skipping radiant floor heat in a passive house?

I'm building a house with (conservative numbers) R 60 walls and R90 ceiling. The windows are in-swing casements with double seals. The floor is going to be stained concrete on 2" insulation. I had 2 consultants tell me that I will not need radiant floor heat it will be too much. We will have a whole house air circulation system and a gas fire place. I am worried about not putting in the pipes in the floor and then being wrong. I am considering just putting in the heated floor under the rooms away from the fire place. I could add a heater to my whole house ventilation system if needed.

Asked By Jenz Yoder | Aug 25 15
16 Answers

American-made Passivhaus-certified windows

Hello All,

Asked By Bob Holloway | Sep 23 14
1 Answer

Solar Path Finding

Hello friends,

Am planning to build a two-floor house with the bedrooms downstairs and a media room upstairs in Southeast PA - 3500 square feet.

I would like to incorporate the concepts of passive heating and cross-ventilation.

How does one find the optimal direction to orient the home? Is there solar path information online that is especially useful.

Also would passive solar homes always look unusual. How do you suggest one incorporate these concepts in a traditional-looking home?


Asked By Bella Victor | Jun 10 15
1 Answer

Adding a porch to a TJI Klingenberg wall

I'm trying to detail adding a porch with roof to a wall with 9 1/2" TJIs (full of cellulose) outside the 2x4 structural wall. The Tji's are not structural but I hesitate to bring the structure through the insulation layer to lag into the 2x4 wall. The loads are not huge but include snow load. The porch is only 7' deep. any suggestions?

Asked By Robert Swinburne | May 24 15
5 Answers

Design Temperature

Design Temperature

It seems like most systems are designed around maintaining comfort on the coldest day of year. This can mean that the heating system is specified for 60,000 BTU but your average BTU requirement is 12,000 BTU. The mismatch likely adds quite a bit to the price tag of the boiler or possibly necessitates a boiler instead of something more economical?

Why wouldn’t a secondary heating system that can add heat to cope with the few days of the year where the heat requirements are at their highest be a more economical design?

Asked By M G | Apr 29 15
0 Answers

Free webinar today - Prefab PassiveHouse construction

I'm not affiliated with the following, but thought it might be of interest to many readers here.

Passive Buildings Canada is offering a free webinar this afternoon discussing prefabricated Passive house construction.
Adam Cohen
Lydia Hunter
Hans Eich

Follow the link here for registration - Fri, Apr 24, 2015 3:00 PM - 4:30 PM EDT

Asked By Mark Fredericks | Apr 24 15
27 Answers

Sizing minisplits for adequate heating & cooling in a cold-climate Passive House

We are building a 2300 square foot Passive House in the midcoast area of Maine and are having trouble choosing and properly sizing our mini splits for both adequate heating and cooling. We live in an area where of course it gets below zero many times during the winter. So we are limited (I think) to the brand of mini-split we can choose from.

Asked By CathrynJones | Apr 11 15
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