Posts Tagged ‘portland passivhaus’

keep it simple

October 4, 2015

POLITICO has published an article by Sara Solovitch on the status of passivhaus in Portland, and some of the disagreements between Passive House Institute US (PHIUS) and Passive House Institute (PHI).

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see the story here

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smart and simple

February 1, 2014

brian libby of portland architecture writes about his visit to the skidmore passivhaus:

www.portlandarchitecture.com

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more news coming soon!

skidmore passivhaus

November 15, 2013

there’s quite a bit of excitement in the air surrounding our skidmore passivhaus.  in addition to officially receiving passivhaus certification (PHIUS +), the house was awarded an earth advantage platinum rating and energy star northwest certified.

back in early october the house was featured on the aia portland’s design matters tour of exceptional homes, and was the only passivhaus on the tour.

a few weeks ago a 4.32kW PV system was installed on the upper roof which is expected to help the house approach net zero energy use.

inhabitat just featured the house on their website, and portland monthly magazine was on site this week to photograph the house for an upcoming issue.

we’re also excited to present a handful of new photos completed by local architectural photographer jeremy bittermann.

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drop us a line if you have questions, want to learn more, or just to say something nice.

you can also follow us on twitter @insituarch

check back for more updates soon.

cool green

July 23, 2013

more we now have a little patch of green lawn and some rusty planters to go with our deck.  summer is here.

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with the amount of high shgc glass on our south facade, it would be easy to overheat without proper shading.

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on the hottest days, we simply close our exterior shades to block unwanted solar radiation before it hits the glass.  the ability to fully control the shades means we can optimize the amount of gain or shade we are getting depending on the daily conditions.

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the shades can be tilted to  allow views out while still blocking the sun.  the cost of the shades was offset by the elimination of cooling equipment and the cost of the energy to operate it.

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the exterior shades combined with the exceptional insulation and thermal mass has kept our house exceptionally cool and comfortable without any air conditioning.

more detail to follow.  check back soon.

www.insituarchitecture.net

nearing completion

June 8, 2013

after almost a year of construction we are excited to say skidmore passivhaus is nearing completion.  it’s come a long ways since this.  here are a few recent shots of the interiors coming together.

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more news, pictures, and the details coming soon.

www.insituarchitecture.net

fast forward

May 20, 2013

we’ve been too busy to post for quite awhile, but work has been progressing nicely on the skidmore house.  here’s a quick look around:

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we hope to be putting the final touches on in the next few weeks.  lots of catching up to do.  check back soon for more on this project and others.

www.insituarchitecture.net

suck and blow

March 27, 2013

rough-in work has wrapped up on skidmore passivhaus and it’s time to look at a few of the features under the hood. this new airtight home (or shall we say leak-free) is equipped with mechanical lungs.

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we chose the PH certified zehnder comfoair 200 hrv, capable of producing up to 125 cfm of continuous ventilation.  this project requires about 70 cfm (60% setting) to achieve .31 air changes per hour (or roughly 1 air change every 3 hours).

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the 3″ flexible ductwork is a double-walled proprietary system called comfotube made by zehnder.  very easy and fast to install.  the goal is to keep the runs as short and straight as possible.

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the round ceiling rough-in boxes are used for either supply or exhaust air.  either 1 tube or 2 tubes are connected depending on the cfm requirements.  exhausts are located in the bathrooms (20 cfm continuous) and kitchen (30 cfm continuous).  we have 3 exhaust locations – each with 2 tubes.  there are 4 supply locations.

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supply air is typically provided at the ceilings but we have a low supply register in the double height living room.

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the tubing terminates in the ceiling of the mechanical room.  6 supply tubes and 6 exhaust tubes.  manifolds gather the supply and exhaust tubes respectively and connect them to the unit.

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exhaust air flows through the machine, the heat is captured in the core, and the air is expelled to the outside.

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fresh air is brought into the machine from the exterior, and warmed by the heat captured from the outgoing air.  the zehnder is about 92% efficient and uses just 7.1 watts / cfm.

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the fresh air supply and exhaust are ducted in well insulated metal ductwork from the bottom of the unit to the exterior.  the fresh air supply is located high on the exterior wall with the exhaust about 10′ below.  the duct penetrations were carefully air sealed to the plywood air-barrier.  this unit also requires a condensate drain that we’ve tied with an air gap into the kitchen waste pipe.

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the main controller will be located in the kitchen, providing the ability to boost the ventilation rate temporarily to 35 cfm while cooking.  each bathroom will have a timed switch to boost the rate to 24 cfm if needed after a shower.  we also conveniently have an operable window located in the kitchen and both showers.

thanks to IM Plumbing for help with the installation, and to Matt Grove from Zehnder for help with the design.

sheetrock has wrapped up and painting has begun.  check back soon for more.

www.insituarchitecture.net

blow

February 19, 2013

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stained cedar siding

February 10, 2013

siding work has mostly wrapped up.  the vertical siding is installed on rainscreen over rigid exterior insulation.  see this past post for more info on the assembly.

here’s a first look at the siding pretty much completed.

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the siding is off the shelf 1×6 channel made from tight knot cedar.  it’s stained with 1 coat of olympic semi-transparent stain in ebony.

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the large south windows (and doors) have exterior motorized aluminum sun shades supplied by hella.  the siding has been detailed to allow the shades to stack in recessed pockets.  in this photo the shades are down about 9 inches and just visible on the 2 living room units (lift / slide door and fixed upper unit).  more on the shading later.

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the “breezeway” features a south facing door / window with a wood canopy (to be painted black) topped with clear tempered glass.

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the entry door at left features acid etched glass for privacy and has a smooth accent panel adjacent that will be painted a deep red.  the wood canopy will painted black and features a simple galvanized metal pan roof.  steel rod will be used to hang the canopy from a bracket mounted to the wall above.  a mahogany deck will eventually complete the front porch.

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the north street facade also features a narrow smooth accent panel that will be painted with the same deep red.  the same siding runs horizontally to form an accent between floors.

check back soon for more.

www.insituarchitecture.net

pre-certified

January 15, 2013

after 6 months of hard work, persistence and a bit of cash, skidmore passivhaus is officially pre-certified.

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(next time i will do a more accurate solar shading report BEFORE the start of construction)

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here are the latest results of the PHPP model:

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more photos soon.