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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

0 Answers

The costs of PH consultants, rights to submit building plans

In Upstate NY plans over 1500 sqft need to be submitted by licensed architects or the proper engineer

Costs run $250 at the low end to approve already drawn plans to $5,000 and up in my work do far.

I would like to see costs discussed here and in a blog Martin along with the fact that a PH consultant is basically doing what two others are the only ones licensed to submit plans.

Archs and engineers pay dearly in expense and time for several years of education and then often some years as an underling in the appropriate office.

Asked By aj builder, Upstate NY Zone 6a | Dec 14 14
10 Answers

I'm overthinking windows again... SHGC question

So I think we're close to choosing a local window producer to furnish our windows. Richlin 500 casements offer U values as low as 0.13, very good air seal numbers, are built down the road from us with a short lead time and an economy price. The only downfall that I'm aware of is that they insist on LoE272 glazing for their triple panes. This gives them a dismal 0.22 SHGC. Since I have 36SF of summer shaded, winter exposed, south facing window, I was thinking of going with a different window on the south side.

Asked By Ryan Griffin | Dec 4 14
3 Answers

Blower door testing by floor or room?

Hello,

Asked By Ryan Griffin | Nov 21 14
4 Answers

Dryer vent in air-tight Passive House

I am building a house in the Seattle area to Passive House standards. After spending countless hours sealing every crack, seam and penetration to achieve under 0.6 ACH, creating a 4 inch diameter hole in my air barrier pains me. I've looked into condensing dryers that are used in some European Passive Houses, but they seam to take much longer to dry and use lots of water. Since I will be installing a vented dryer (unless someone can come up with another solution), are there ways to make the dryer wall vent more air-tight when the dryer is not in use?

Asked By Gerald Blycker | Nov 21 14
1 Answer

Can a skylight ever be energy positive?

Hello,

I'm curious as to whether skylights are always net losers, or if one could be favorable given the right conditions. In general they seem to be avoided due to the heat gain potential and nighttime loses.

Asked By Ryan Griffin | Nov 18 14
3 Answers

Air sealing windows

I am building a Passive House with double stud walls and all OSB seams sealed with Prosoco Joint and Seam filler. I have plywood window bucks and triple pane windows with nailing flanges installed on the exterior of the rough opening. I need to air seal the inside of the window frame to the plywood window bucks. I would like to fill the space between the window frame and the plywood with foam and then air seal.

Asked By Gerald Blycker | Nov 6 14
0 Answers

how do I maximize the use of my ERV in my Passivhaus(Vancouver canada)

we are in a new home that meets the International Passivhaus Standard
we have 2Ultimateair Ervs, one for upper floor where my daughter lives (1700sqft)
one for main floor(1800sqft), we live in a moderate moist climate Vancouver BC.
what is the best way to maximize the benefits, save energy and have a comfortable home?
eg should it run constantly in winter? what happens when bathroom window is left open?

Asked By Teresa Hotell | Nov 3 14
7 Answers

Closed-cell spray foam versus dense-packed cellulose - Noise control in a PassivHaus

This is a comment rather than a question.

In our pre-certified PassivHaus in northern NJ, we have 10-inches of densepack cellulose and 2-inches EPS in the walls, and 10-inches of closed-cell spray foam in the roof.

We've noticed that the noise attenuation through the walls is much greater than through the roof.

Most of the noise getting into the attic comes through the roof, which is asphalt shingle over plywood decking on 2x12 rafters, with the space between the rafters filled with 10-inches of the closed-cell spray foam.

Asked By Len Moskowitz | Oct 15 14
1 Answer

What is the best ventilation system for a passive design cafe/restaurant?

We are trying to design a passive cafe/restaurant building and i want to know the best ventilation system to use for the building please.

Asked By monita taghva | Oct 20 14
5 Answers

Retrofitting new wall inside existing frame

I have an interesting challenge in my 1941 1500SQFT energy retrofit in Minneapolis (Zone 6-7). I want to maximize realistic R-value while preserving the existing siding and sheathing, which we can assume has no vapor barrier (this will be verified when we open it up). While I would normally prefer to wrap the exterior, this is not possible at this time. There is no historic value to the plaster/sheetrock, and we're demoing kitchen and bath anyway, so I intend to do all insulation from the inside. The home is all 2x4 16"OC construction with old yellow fiberglass batts.

Asked By Ryan Griffin | Oct 8 14
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