One year in: what I love about living in our Passive House (part 1) 💙💙💙

The blurry effect the house has had on our children.  

The blurry effect the house has had on our children.  

In spirit of our Canadian thanksgiving, I wanted to follow up my previous post with some house love.

It is an eye-opening reminder of how good we’ve got it when I think back to some of our previous living environs. Over the past 10 years together, we’ve lived in 7 different homes (not including the 18 months we spent globetrotting), including some with electric baseboard heaters, and some with the highest-efficiency gas furnaces; some with AC, and some without;  some with mold in the walls, and some with bugs in the walls. In Ottawa, there’s no doubt that winter puts the performance of a house to the test. The air is dry, and it’s cold...freezing cold. We’ve employed all sorts of active strategies to thwart winter discomfort. To name a few:

  • Hot water bottles and flannel sheets in bed
  • Blankets, sweaters and slippers
  • Humidifiers to keep us breathing easy
  • Weather stripping and window plastic to improve the r-value of our windows (looking outside be-damned!)
  • Programmable thermostats to help manage time-of-use consumption costs

I still recall a time when Mark and I were living in an old Victorian home, which was renovated in the 80s, with electric baseboard heating (when electricity was cheap in Ontario). We were still recent’ish graduates, living paycheque to paycheque, with student loans up to our necks. We were terrified at the site of our hydro bill. We were looking at ~$700/month to heat our 2 bedroom apartment in the heart of winter. Of course we didn’t realize what we in for prior to signing the lease... The house was always cold — we stockpiled slippers and sweaters for all who came to visit. We purchased a cord of firewood for our fireplace to help counter our electricity demands. On the coldest nights, we moved our mattress out in front of the fire to sleep and keep warm. It was fun, and romantic, but a lot of work and a major pain in the ass. In hindsight, the fire was probably making our heating costs go up vs. down, knowing what we know now about building performance. We tapped out after one winter.

What was it like then living in our passive house, one winter and one summer in? Mark has a couple more technical posts on the heating patterns observed in our home, I’m just speaking anecdotally, from what my experience living in the house was. The best compliment I could give it is: I didn’t notice. The house didn’t affront me, the way the previous ones did. I wasn’t bothered by cold bedsheets, bathtubs or drafts coming through the walls and windows. I could sit in our book-nook and read to the kids an inch away from a large window. My daughters eczema improved, there were no nosebleeds, and less colds and runny noses – an attest to the air quality, I'm sure. When it came to the thermostat: we set it and forget it. The performance of the house faded to the background.

Also of note: our behaviour didn’t have to change, other than to open the curtains during the day; thus enabling us to simply live, and be, in the house. We took long showers and baths, frequently ran the washer and dryer, kept our espresso machine turned on, as well as the computer + backup drives, and kept our thermostat at an even 22°C throughout winter – we like being warm :) Our annual consumption (energy required to heat and power our house) was 47.5 GJ. This is less than half the energy of a typical new house in Ontario (107 GJ), without even trying. (That’s a new house, if we looked at average energy consumptions, the number would be much higher).

We feel as though our lives have been dramatically upgraded. We are living a more luxurious lifestyle in our new home, using a fraction of the energy to do so. People shouldn't have to give up or sacrifice in order to live in a passive house. At least that’s not the philosophy we’ve ascribed to. In order for it to become more mainstream, that’s hopefully how more people will come to see it too. The success of the Tesla isn’t because it’s the eco-friendly option (although those government incentives don’t hurt…). It’s because it performs waaaaaaay better than other cars, even other performance cars. It’s also beautifully designed, which is of equal importance IMHO. As I’m sure I’ve written before, if something performs well, but doesn’t look good or feel good, you won’t love it. And if you don’t love it, you won’t keep it or take care of it.

All this to say: I love my house. One year in, and all the aspects of the house that make it passive house, are actually what makes it 100% livable.

I’ll be sharing more 🏠❤️ and lessons learned.

Cold and sunny: temperature and kWh consumption

When designing a Passive House, we use the Passive House Planning Package (PHPP) to model the energy performance of the project. The PHPP considers two different design days: clear/cold and overcast/mild. Ottawa winter days follow these patterns very consistently. Yesterday was a prime example of a clear/cold day. As I mentioned in the last post, our heater shut off for 11.5 hrs during the day, even though the temperature outside never got above -12˚C.

Here is the chart of yesterday's temperatures. There are 2 indoor temperatures being monitored: the Book Nook is on the east side of the house outside of the master bedroom, and the Loft is on the top floor of the house. You can see that the temperature in the loft starts to rise noticeably as the sun gets around to the West, and starts to come in through the large lift-and-slide door in the loft.

And here is the electricity consumption (downloaded hourly from Hydro Ottawa's website). You can see the drop at 9am and the ride at about 9pm — this is the 4kW heater turning off then back on. It's interesting to notice how, even as the heater shuts off at 9am, the temperature in the house climbs steadily from 7am through to about 4pm! 

Life in a Passive House: 2017-03-04

image.jpg

Our brief flirt with spring weather has ended (for now). This morning we woke up to -18 on the thermometer, and it's been below -14C all day (it's 2pm as I right this). 

Our "furnace" (the 4kW duct heater that heats our home) turned itself off at 9am, and has been off ever since. That's 5 hours at -14C or colder without any heat on! What's more, the temperature has been slowly climbing all day thanks to the sunny weather—it was 20C when the heater stopped, and its 22C now. 

I'll comment later to let you know what time tonight the heater comes back on. 

May 14th - Open House and Tour 10am-3pm

Our new blue doors will be open for all this coming Saturday!

Our new blue doors will be open for all this coming Saturday!

We are planning to have an open door tour day this coming Saturday, May 14th. Our doors will be open from 10am until 3pm, and I'll be giving a walkthrough tour at 12pm.

Please come by and check out our Passive House build! This will be the last chance to tour the house before drywall starts. It's a great opportunity to see into the walls and mechanical systems. There's no need to sign up in advance, please just come by at your convenience.

Looking forward to seeing everyone in a week!

What: Wander House open doors tour day (Passive House infill project)

Who: Mark and Meghan Rosen will be on site all day to answer your questions and show you around. Mark is the Architect, Passive House Designer, Owner (with Meghan), and Builder on this project. Check out plotnonplot.ca and beinc.ca for more information on Mark's architecture and consulting firms.

When: Saturday, May 14th 2016, 10am-3pm (tour at 12pm)

Where: 105 Bayswater Avenue, Ottawa, ON

Construction week 29 – interior walls

Interior walls somehow make the spaces feel bigger

Interior walls somehow make the spaces feel bigger

Interior walls are complete. We are holding off on building our service cavities until Mark can perform an air test. He can’t perform the air test until the shell is completely sealed. He can’t finished sealing off the shell until he gets more tape, which he ran out of late on Friday. So...the air test will have to happen next week.

It’s important that the air test happen at this early stage because if we find gaps now, they’re easy to fix. If we wait until after we build the wall cavities, we’d have to take them apart to get at the leaks. The air test is important because the performance of our house hinges on it being of a certain value. Any amount we exceed this value, drastically improves our energy model. Our target is very aggressive, so we’re not expecting to beat it by much. But we hope so. We hope it breaks records ;)

Mark is contemplating whether or not to Periscope the air test. If you want to see it, let us know! Once we’ve run it, we’ll write another post going into a bit more detail.

What else happened last week?

  • Our flat roof was insulated. Mark spec’d a ‘dense pack’, but the installer gave us more of a ‘pillow pack’. So they had to return and fix it. Which goes to show it really helps to have a general contractor who knows what to look for. Good job Mark!
  • We installed the air vapour barrier against the basement walls, which forms part of our continuous air barrier line.
  • The plumbing vents rough-ins went in.
  • AND we settled on the lighting for our open space. It’s been a major design dilemma. And had the potential to cost muchos dineros. We got clever and are designing our own lighting system, which you shall see when it comes together in real-time. We’re very excited about ticking that one off the list.


Next week: air test!

Basement air and vapour membrane

Basement air and vapour membrane

Plumbing vents through the roof (pre-insulation)

Plumbing vents through the roof (pre-insulation)

Attic insulation (blown-in cellulose)

Attic insulation (blown-in cellulose)

Construction weeks 26 & 27: windows and air barrier

gaulhofer-lift-and-slide

We have windows! The Hermann’s installed those that could be man-handled and lifted into place by hand on week one, and the remainder on week two with the help of a crane.

Getting the house sealed in and weather proofed is holding us back at this point so it feels good to have them in place. And damn they’re fine. Feels like a legit house now. It’s a thing of beauty.

The crew also finished off the wall cavity insulation and started installing the air barrier, which is a layer of OSB (oriented strand board -- comes in sheets like plywood) that gets taped at all the seams with a special Siga membrane tape.

And some photos:

Window delivery

Window delivery

Our glass

Our glass

Mark and Andreas trying to give high 5s while holding up a 2000 lb window in place

Mark and Andreas trying to give high 5s while holding up a 2000 lb window in place

The thickness of our triple-pane kitchen window. NO backyard baseball games.

The thickness of our triple-pane kitchen window. NO backyard baseball games.

Kitchen window install -- Justin and Andreas

Kitchen window install -- Justin and Andreas

Rear elevation avec les windows

Rear elevation avec les windows

Front elevation with temporary door

Front elevation with temporary door

The loft window lift-and-slide

The loft window lift-and-slide

What else of news?

There have been some headaches around getting our second construction mortgage withdraw because our unconventional build is being treated as conventional. We hope things have been ironed out, but have yet to receive the monies in our bank. This is a longer blog post for another time. Argh.

Now our shell is 95% complete. There are still a few items outstanding:

  • our attic and flat roof need insulating (blown-in cellulose)

  • some wood fibreboard is missing on the outside (because of how the walls were lifted)

  • some weather-proof taping to be done on the seams of the wood fibre board

We need to start making decisions ASAP on a lot of things. Our kitchen will need 10–12 weeks at the factory, which means we are already behind the 8-ball. Our lighting and plumbing fixtures need sorting too. We have yet to make these decisions and already decision fatigue has set in.

If I’ve made light of building a home, in any way, you have been misguided. It’s not for the weak of heart or will. One the one hand, I’m ecstatic to see our home coming together and to reach these huge milestones. One the other, there is still so much to do. It’s a massive source of stress. In some ways though, it feels like the homestretch (before the homestretch). And when I walk into our home, I am in complete awe. I love it so much, which definitely helps to ease the stress. Looking forward to ticking some key decisions off the list.

 

Construction week 24 & 25: lots of snow shoveling

We had record snow fall in Ottawa last week. Apart from shoveling, here's a quick summary from the last couple weeks:

  • roof sheathing, membrane, and metal roof 
  • truss blocking
  • window bucks installed, reinforced and double-checked for size
  • insulation started

Earlier today, Mark gave our first public tour of the house. We had around 15 people brave the construction site and cool temps to listen to how our house is coming together. Thanks to all who came out. Hope you learned something.

Here's Mark introducing our home on the tour.

Here's Mark introducing our home on the tour.

This upcoming week, Mark will finish insulating. And our windows are getting installed. EeK!!!