Energy Conservation Category

Foundation Walls

November 20th, 2008 by Conrad in Blogs - Mill Creek Net Zero Home, Energy Conservation, Green Building Blogs, Green Homes

The MCNZH foundation. The rectangle that’s jutting out is the cold room, located under the front steps/landing.

A frequently asked question regarding the Mill Creek NetZero Home (MCNZH) is: “Why didn’t you use Insulated Concrete Forms (ICFs) for the foundation walls?”.  The short answer is: “using traditional concrete forms and innovative insulating techniques, we can achieve a much higher R-value for less money”.

ICFs are concrete forms made of styrofoam that you set up, pour concrete into, and leave in place to act as insulation. Here’s a picture of someone setting them up:

The advantages of ICFs include decent insulation value, ease of learning for the do-it-yourselfer, and ease of setup (foam is a lot lighter than plywood).

There is a myth that ICFs provide walls with an “equivalent energy loss performance” to an R 50 wall. The argument goes that the mass inside of the concrete walls acts as heat storage, thereby buffering heat as it goes in and out of the building. The counter-argument is quite complex, but suffice to say that I’ve heard very knowledgeable people say that ICFs performing like an R 50 wall is complete bunk. The argument makes sense, too. When it’s minus 20 outside, the relatively small amount of thermal energy stored in a concrete wall will have little effect. R value is R value. ICFs provide about an R 22 wall, with no thermal bridging. That’s pretty decent, but it’s not R50.

The foundation walls for the MCNZH will be insulated to about R 49 - actually R 49, no caveats or stars beside that term. We had the walls poured conventionally - with plywood forms - in August (see picture at the top), and before we poured the basement slab Peter Amerongen’s crew glued 5 inches of ozone-friendly foam against the inside of the foundation walls. That will provide R 22. Then, we had interior walls (called frost walls) framed along the foundation walls, 7 inches away from the foam. When the cavity between the foam and the frost wall is filled with cellulose fiber insulation, at R 3.74 per inch, it will add 26.88, for a total R value of 48.88 for the foundation walls, with no thermal bridging. Not too shabby, considering that conventional builders will insulate to R 12, with a full thermal break at each stud. Here are some pictures:

The door opening in the MCNZH’s basement. The foam is glued directly to the concrete (only 2.5 inches here, we ran out of foam, but we’ll add more later), and the frost wall is framed out 7 inches away from the foam.

The window opening in the MCNZH’s basement bedroom (opening still filled with plywood). Here you can see the full 5 inches of foam, with the frost wall framed 7 inches away.

Another view of the frost wall.

This foundation will provide very high energy-saving performance, and it was fairly economical. It should be a very comfortable place for someone to live.

(cross posted at greenedmonton.ca)


Power to Your Mailbox

November 19th, 2008 by andrea in Community, Energy Conservation

Last week, in my mailbox appeared a brand new fluorescent lightbulb. Watch your mailbox closely this season - you’ll probably be gifted with one too!

So who’s the secret santa? Meet Project Porchlight - an eco-initiative of non-profit Ottawa organization One Change. Back in 2004, One Change founder Stuart Hickox met inspiration in the following statistic:

‘If every household in Canada replaced a single incandescent lightbulb with a fluorescent, the effect would be equal to removing 66,000 cars from the road.’

That’s the power of simple actions orchestrated en masse. And that’s what Project Porchlight is endeavoring to do.

Care to help? Project Porchlight is recruiting volunteers to deliver ‘power savings’ to mailboxes Canada-wide. Volunteer orientations are happening right now, so if you’d like to take a walk and fight climate change at the same time, join the movement! I just did.

Resources

How to recycle a fluorescent lightbulb


Build a 60 Watt Solar Panel for Under $130

November 17th, 2008 by andrea in Dynamic Spaces, Energy Conservation, Projects, Renewable Energy, Solar

You’ve gotta love brilliant people. I have this one friend who designed and set-up a system that uses basic filters and plants to purify the water leftover from his recycled paper-making business.

And then there’s the people who just wake up one morning, scratch their noggins and decide, “I think I’m going to make a solar panel this week.” I just marvel at those people. M. Davis of Arizona did just that.

Ok, so it might have taken him longer than a week, but with some materials scavenged from his garage, some parts sourced through ebay and a touch of brilliance, M. Davis now has solar power.

My first thought when I saw this project was ‘good for him. Too bad I’m not gifted enough to build a schmancy solar panel.’ But M. Davis has taken the time to document how he did it in plain English on his own web site and on Instructables. Plus, you can email him if you have questions!

(Image Source: M. Davis Site)

Based on Davis’ writeup, the skills needed to build a solar panel like this are:

Basic Woodworking Soldering Electronics Wiring

For a seasoned do-it-yourselfer those skills are old hat. But, if you’re just starting out, recruit people you know who have these skills! Building a solar panel like this could save you some good cash. You could either make like M. Davis or hand over $485 CDN to Real Goods for a 62 Watt Solar Module.

Oh, and if this project is to basic for you, try building your own wind turbine. Or better yet, build me a solar panel!


Cold? Put a Sweater On….Your House

November 4th, 2008 by andrea in Dynamic Spaces, Energy Conservation, Products & Materials

Every year as temperatures plunge we return to the age-old feat of staying warm. We unearth our familiar woolies, don knitted slippers, and gradually slip into a 6-8 month hibernation period. This year, why not put extra layers on your house as well?

Insulation Types

Choosing a sweater that brings out your eyes is far easier than selecting and installing one or more layers of insulation in your house. So, let’s start with the basics. Natural Resources Canada has compiled an extensive list of different insulation types, how they work, and what their R-values are. The University of Alaska also has an informative at-a-glance chart (pdf) to easily compare your options, while HGTV’s Ecologue’s snappy insulation overview video is sure to warm you up to the idea.

Read the rest of this entry »


Isulated Basement Slab

November 3rd, 2008 by Conrad in Blogs - Mill Creek Net Zero Home, Energy Conservation, Green Building Blogs, Living Spaces

The best two things a home builder/renovator can do in the name of energy efficiency is to insulate and seal a house. It’s almost too bad, what with our culture’s obsession with everything high tech. When people ask me about the Mill Creek NetZero Home (MCNZH), they’re often expecting to hear about technology’s magic answers. When I start talking about insulation levels, eyes start to glaze over, but the truth is that 75% of the difference between this house and a conventional one is that it’s sealed as tight as a plastic bag and it’s super-insulated. Read the rest of this entry »


How to Carpool

October 20th, 2008 by andrea in Energy Conservation, Transportation

Ever heard that if you want something done, to do it yourself? When it comes to carpooling, I’d agree full on. As much as you wish your employer or city had a carpooling system to take you to work and back and save you some green in the process, it’s probably not going to happen on its own.

Green Living Online editor Shelagh McNally even wrote up a how-to guide for you. So get your fanny moving, start a carpool, and cut your carbon emissions today.

Tonight, my volleyball team will be using 2 cars instead of 6 to get to a game that’s 27 Km from where I live. See how many cars you can get off the road the next time you go somewhere.

Resources

Car Sharing and Carpooling Services in Canada

Trip Driving Cost Calculator - Gives you directions, a map, the fuel cost for your trip, and a cost comparison with other car models.

Pickuppal.com


Domes With a Twist

October 14th, 2008 by andrea in Dynamic Spaces, Energy Conservation, Green Building & Design, Green Homes, Renewable Energy, Solar

We’ve cheered on the creative and efficient dome home design in recent months, and have now discovered a truly unique variation that’s sure to turn heads. Innovative company Solaleya was spotted at recent West Coast Green Festival by Inhabitat writer Chris Worrall. Solaleya is the creator of the dome house that, wait for it - rotates to follow the sun.

Yes folks, you’ve heard of rotating restaurants and dance floors. Now, you can actually order and live in a house that slowly spins to take advantage of passive solar heating and natural lighting opportunities. The domes come with a remote control allowing you to orient your picture window to the view of your choice.

Framed with FSC-certified wood and insulated with cork, Solaleya’s design presents a number of eco-friendly benefits. Unfortunately, each unit is pre-fabricated in France, requiring that it be shipped overseas to the construction site. But here is a design for living that can respond to the seasonal angle of the sun. That’s an impressive concept by any standard.

Solaleya Dome Home Video


Fighting Carbon BBC-Style

October 6th, 2008 by andrea in Energy Conservation

Like a few other carbon calculators-gone-social, BBC’s Bloom site presents 50 carbon-fighting actions from line-drying your clothes to traveling by train. With Bloom’s actions, you can see how many other users have pledged, learn more about the impact an action will have, and invite your friends to pledge with you.

The best fun to be had here is to cruise through Bloom’s flash-animated collection of actions represented by colourful beans placed in a spiral. Watch the bean sprout and bloom when you adopt an action. Sure, the site’s a bit UK-centric, but us Canucks never seem to mind. British accents and lingo are a ceaseless source of amusement for many of us.

If you’re motivated visually, check out Bloom today. Raising Spaces also recommends World Wildlife Fund’s Canadian version The Good Life. It tracks your carbon emission reductions with each simple action you take while allowing you to challenge your friends to some friendly carbon cutting fun.


MCNZH - Progress (part 1)

October 3rd, 2008 by Conrad in Blogs - Mill Creek Net Zero Home, Energy Conservation, Green Building & Design, Green Building Blogs, Living Spaces

We tore down the house at 9805 - 84 Avenue about 45 days ago, and Peter Amerongen and Habitat Studios have made a lot of progress since.

The very beginning was quite stressful due to some difficult neighbour relations, but we go through that (for now). In the meantime, our foundation is poured and backfilled:

and the framing is well underway:

Adam the framer frames the double-walled exterior walls. Once filled with insulation and sealed, they will provide an amazing R56-rated resistance to heat flow to the outside.

The east and west walls completed, with a pile of reclaimed two-by-fours from the old pink house that Adam and Nick, the framers, will reuse as backing.

Rim detailing: Adam seals the gaps between boards to reduce air movement around the floor rim. This rim would normally remain exposed, leaking air for the entire lifetime of the house.

Adam finishes the rim detail by stapling a strip of Tyvek over the floor rim board. Attention to details like this, which Adam and Nick are very conscientious about, is very hard to come by in Alberta’s slap-it-up-quick building industry trades culture.

The framing is probably the most revolutionary part of this NetZero Home, which is ironic because it adds the least amount of cost compared to the other innovations. Insulation and good sealing have no moving parts - they will save energy 24 hours per day, 365 days per year, and never break.

The second floor should be done by the end of this week!

(Cross-posted at greenedmonton.ca)


(Another) Chest Fridge Update

August 19th, 2008 by greenspree in Blogs - Shire Strawbale Home, Dynamic Spaces, Energy Conservation, Green Building Blogs

One of the things we noticed when we plugged in our new chest fridge was the amount of condensation we were getting inside the fridge and how useless the little drain hole in the bottom was. To be fair it IS supposed to be only for draining water when defrosting…

It got so bad that we were actually getting a little bit of rust forming at the seams inside the compartment! Needless to say this wasn’t a very healthy turn of events for either us (possible mold) or the fridge (rust).

I got to looking around the internet and turned to the home brew forums to see what the kegerator guys who led me to the Brewer’s Edge controller had done for their keg chest fridge’s when condensation happened. Many said you would have to wipe the inside down and eventually replace the appliance when rust ate through the coolant tubes, but others said they had good luck with a product called Damprid that sucked moisture out of the air. Exploring further it turned out that Damprid is merely calcium chloride which is used for road salts in some places and for chlorine free pool treatment as well and can be had at much lower prices in large quantities than you pay for the name brand products.

I went out to Home Depot and found a 1KG bag for $6 and made a holder out of two ice cream buckets inside each pother with holes in the bottom of the top one to let the brine that develops when the calcium chloride absorbs moisture drain into the lower bucket. Within a few days of putting it into the fridge the beads of moisture that coated the inside of the fridge were gone and all surfaces were bone dry!
It seems there are many lessons to learn from those inventive home brewers!

(cross-posted at greenspree.ca)