What makes Passive House different than other green building standards? BCIT and Marcel Studer of Econ Group Ltd sit down to have a chat.
As one of the of the most established Passive House builders in the Lower Mainland, we are excited to invite you to our North Shore Passive Under Construction Open House.
Regardless if you are new to Passive House or a seasoned pro this is a great opportunity to see the normally hidden components that distinguish a Passive House and to learn more about details, assemblies and design considerations.
We would like to welcome you on Friday September 25th, 1pm-3pm at 418 10th Street East, North Vancouver.
This is a great opportunity to experience a Passive House in person before the upcoming North American Passive House Conference in Vancouver October 1-2: http://naphn15.canphi.ca/
Econ Group’s Marcel Studer was part of the ceremony in Victoria last week at which Bill Bennett, Minister of Energy and Mines, presented a $100, 000 ICE (Innovative Clean Energy) grant to Canadian Passive House Institute West for their Passive House education and certification efforts.
“This announcement is an enormously significant, clear message that the work and education we all in the Passive House community have been up to in the Vancouver area for the past decade, is beginning to pay off,” says Marcel. “It’s really an exciting moment to be involved.”
The grant will support increased training and certification opportunities for construction and design professionals so that they can build the most energy-efficient buildings in the world, right here in British Columbia. It will help sponsor and subsidize introductory or certification courses in Passive House design principles offered by CanPHI West for up to 200 qualified professionals in British Columbia.
Econ Group has been building to the Passive standard for over a decade, and actually built the first residential Passive House in BC. Our next Passive House project breaks ground in North Vancouver in April 2015, with two others on its heals in May and in the summer. Learn more about Passive House technology at my previous North Shore News article on the topic.
The international Passive House standard is the one of the most rigorous and advanced building performance standards in the world, achieving reductions in heating energy of up to 90% compared to other buildings.
Read the full article on BC’s Passive House funding at https://www.newsroom.gov.bc.ca/2015/03/province-funds-energy-efficiency-training-to-support-conservation-goals.html.
Through the last decades, the notion of building homes in more environmentally friendly ways has become much the norm. Slowly but surely, at least here in Canada, the conversation has shifted onward from discussing why building technology needs to evolve to discussing how exactly building technology can evolve in order to most responsibly take on its own environmental inefficiencies. What once was considered alternative has now become quite mainstream.
Consider Vancouver Mayor Gregor Robertson’s Greenest City 2020 Action Plan target: “Require all buildings constructed from 2020 onward to be carbon neutral in operations.” Other municipalities around the world are setting the same tone: Melbourne officially became carbon-neutral this year, Copenhagen is pushing for the same by 2025, Seattle by 2050, the entire country of Costa Rica by 2021. According to Vancouver’s Action Plan, greening up construction practices here would mean big positive impact: “the electricity and natural gas that buildings use make up 55% of Vancouver’s greenhouse gas emissions.” Essentially, we need to get building green, and get building green mighty quickly! But we’re in luck…enter, Passive House.
The initial principles that eventually gave rise to the Passive House movement were actually developed here in Canada as part of the Saskatchewan Conservation House demonstration project of 1978. And though the project also stimulated the creation of NRCan’s R-2000 building certification program, the technologies and methodologies were never adopted into any municipal building code, thus slowing the positive momentum inside our borders. Instead, the findings took root in Germany and Passivhaus was born into receptive hands. Today, thanks in part to stricter environmental regulations driven by proactive policymakers, there are about 50,000 Passive House units worldwide.
At the heart of Passive House is not an overly novel idea. Rather than using old tires or straw bales (like some of its green building cousins), and rather than tallying vast arrays of enviro-scoring criteria (like some other of its green certification relatives) Passive House aims to do one thing extremely well. And that is: keep heat where it’s supposed to be.
In order to regulate temperature within the home, a more robust envelope is needed to make the building essentially airtight. Standard framing walls (see my Framing 101 article from 3 July 2013) are made to be super-insulated and double or more the thickness, windows become triple-paned, and solar orientation becomes paramount to success. The need for fresh air and moisture control is managed by a low energy active heat recovery ventilation (HRV) system. The impressive energy savings potential of Passive Houses (many use 90% less energy than traditional, to-code builds) is at the concept’s core, however, neither comfort nor affordability are overlooked.
A Passive House, absent of typical drafts, is kept at a constant temperature ever replenished with fresh air. Warming up the space even further literally means either inviting over a friend, turning on another light, or even just lighting a candle! How’s that for comfort?
And the costs to build Passive are coming down (as with any other newer technology engaged in the process of catching on and becoming the norm). In places like Germany (the first real adopter of Passivhaus), the incremental cost to build Passive runs under 5% more than a traditional home built to code.
As a wholly performance-based environmentally aware building methodology, Passive House utilizes energy modeling software to accurately predict how heat and energy will behave in a given (and unique) construction scenario. The design is then honed to produce the most optimal result based on the parameters of the site, etc.
With 2020 around the corner for our Vancouver area’s target to build only carbon-neutral buildings, Passive House offers a proven platform onto which photovoltaic solutions or the like can be added in order to supplement the small amount of active energy input required to become Net-Zero or carbon-neutral. It is a no-nonsense, science-backed solution that reduces our housing footprint while creating homes and communities that are built to last.
For more information on Passive House visit the Canadian Passive House Institute West at www.canphi.ca.
Project: The Treehouse Playhouse
Location: The Pacific National Exhibition, Vancouver, BC
Cutting: Cut My Timber
Design: Econ Group Ltd
Assembly: Leon Lebeniste
Check out our whole process of designing, cutting and building our awesome Treehouse Playhouse for Canfor’s 2013 Playhouse Challenge on Facebook. This was a 100% volunteer effort by Econ Group Ltd., Cut My Timber and Leon Lebeniste. All funds raised by Canfor (through the auction of all the playhouses) were donated directly to the Vancouver Children’s Hospital.
Written by Econ’s Dalit Holzman and originally published by North Shore News September 2013
Over the last few weeks, it seems like the days have been spent less in shorts and more in woollen long-johns, the children scurrying off to school sack-packed with muddy-buddies and rain boots. Ahh yes, truly summer has officially waned and autumn is here. Time to bring out the knitting, the hot water bottles, the novel abandoned back in June. Finding warmth is now at the top of my biological imperatives list. In this installment, I’ll shed a bit of (vitamin D filled) light on some home-heating options (other than layers of wool sweaters) readily available to us here in the Pacific Northwest.
Passive solar heating is, by far, the most ideal and most efficient option available. Rather than relying on solar panels (used in active solar, or photovoltaic, electric generation), passive solar is achieved through the direct heating of thermal masses within the home. The warmth absorbed by these masses while the sun is shining is then radiated out as the ambient air temperature cools (and the sun goes down). (Anyone who has sat on the sandstone beaches of our area after sunset can attest to this effect.) Whether it’s the floor, the walls, or a giant decorative black boulder that sits in the centre of your living room floor, as long as the envelope and windows of a home are robust enough (recall the Passive House principals I described 2 months ago: double wall thicknesses, triple-pane windows), then the warmth will be absorbed and re-radiated as described. While there is no downside to this carbon-neutral and zero-cost heating method, relying on it for your home’s heat does require specific building positioning to the sun and the incorporation of the previously mentioned robustness. I encourage anyone seriously considering passive heating to familiarize themselves more broadly with Passive House design principles. (Please do not hesitate to email me directly for more.)
Geothermal heating is another efficient option for some in our area. The process operates from the heat differential that exists between the temperature of the air and the temperature of the land just below the surface. With the aid of an electrically powered ground source heat pump, the energy is extracted and the home is heated (or even cooled in the summer months). The downside of this technology is that it relies on long runs of pipe. People living rurally may not have a problem with running 1500+ feet of pipe 4 feet deep, while urban counterparts might find the four 300 foot deep holes necessary (due to lot size constraints) rather cost prohibitive.
Radiant heating is experienced via radiators (hot water or electric), masonry stoves (in Europe mostly), and, most popularly these days, through electric or hydroponic in-floor systems. If radiant heating is incorporated within a passive solar or geothermal system, or more holistically within a Passive House model, the amount of power it requires can be greatly reduced.
Keeping its inhabitants warm and dry is every home’s chief objective. Home design focused from its outset on achieving warmth (or cool depending on the season) has a better chance at long-term success and sustainability than design that treats it as an afterthought. The cost of heating its interior does not have to be the greatest (and most wasteful) operating expense of owning a home.
If you’re keen to know more about what makes Passive Houses so energy efficient, how they can literally be heated with candles, I encourage you to check out the Passive House North 2013 Conference going on this Friday and Saturday (the 27th and 28th) at the Westin Bayshore in Vancouver. For more check out http://www.passivehouse.ca/conference-2013.
Written by Econ’s Dalit Holzman and originally published by North Shore News September 2013
Sitting at my kitchen table off Grand Boulevard in North Vancouver, my laptop picks up three wireless networks. When I lived in a high-rise near Park Royal, I routinely would see 20 or more pop up. If I take a stroll down Lonsdale, it seems like just about every business has its own; plus my Internet provider has blanketed the area with its wireless network making it ever easier to jump online. The convenience is remarkable. But still, I can’t help but feel wary. All of these signals, bouncing around: wireless coverage, lightning speed cell phone networks, Smart Meters, standard EMFs…our bodies sitting in the middle.
Most of us are not strangers to the Smart Meter debate. I walked by a home the other day with 8 “no Smart Meter” signs on its various doors. The group Citizens for Safe Technology has created action kits for Wi-Fi, Smart Meters, cell towers and cell phones stating its concern about the exponential increase in public exposures to harmful wireless technologies. However, BC Hydro defends its technological achievement, stating that “the exposure to radio frequency from a smart meter, over its entire 20-year life span, is less than a single 30-minute cell phone call”.
Many, including the WHO, deny that we are at risk within our modern world. The World Health Organization publicly states: “Based on a recent in-depth review of the scientific literature, the WHO concluded that current evidence does not confirm the existence of any health consequences from exposure to low level electromagnetic fields. However, some gaps in knowledge about biological effects exist and need further research.”
And it’s the gaps that worry me. I am certain that when I turn down the dimmer switch in our bedroom, the light actually buzzes, and am pretty sure I detect a high-pitched ringing when my cell phone is on charge. These items are dwarfed by our very near future filled with smart networks, sensor networks, smart buildings and self-driving cars. From my perspective, the “gap” WHO mentions is that all of these technologies have not been around for long enough to know the greater effects on our collective health.
In the meantime, there are a handful of principles commonly used to limit EMF, wireless and radiation exposure when building a new home. People embarking on construction should have a thorough discussion with their contractor to communicate their wishes, understanding that their desires will certainly translate to extra project cost.
The safest option to decrease EMF exposure is to distance oneself from it as much as possible. This can affect not only one’s decision on where to build his/her home (in relation to transfer stations, cell towers, etc.), but also how the home is laid out within the interior. The kitchen and media room are a home’s technological epicenters, while the bedroom is traditionally designed to function as a safe-haven from technology. In this regard it is best to keep the kitchen, media room, office and mechanical room grouped together within the home, and sitting as far away (vertically and horizontally) as possible from the bedroom(s).
Furthermore, the permeability of the house’s membrane affects the overall shielding to exposure. As builders, our company has experienced that steel cladding and roofing can virtually eliminate radiation, wireless, cell coverage and EMFs from external sources. On the interior of the home, limiting exposure can be achieved by hardwiring your computers, using corded phones, eliminating dimmer switches, installing master kill switches (used to turn off circuit zones during sleep hours, etc.), and running wiring through well-shielded rigid conduit in patterns that do not encircle bedrooms.
Written by Econ’s Dalit Holzman and published by North Shore News August 2013
Within new home construction one of the most misunderstood matters of business is the area of insurance. For many of us, conversations centred around liability, deductibles and indemnification are invitations to the sweet Land of Nod; however, insurance is an undeniably crucial component of building a new home. Regardless of personal bent, it is vital for all the members of the project team (homeowner, contractor, subcontractor, architect, engineer) to educate themselves on the layers of responsibility (and resulting myriad policy types) involved in their specific build.
“Above all, it is essential for the homeowner to remember that he is ultimately financially responsible for anything that happens on his property,” warns Gord Thompson of gtinsurance.ca. “This isn’t to say that the homeowner is on the hook for the quality of the contractor’s workmanship, but it does mean that he has a highly vested interest to understand how to protect himself.”
During the initial stage of pre-construction (when the land waits patiently for design and permitting), the property owner holds Site Liability Insurance.
Once site preparation begins (see my stages of construction checklist from 2 weeks ago), the owner continues with her Site Liability Insurance and the Contractor and Subcontractors hold General Liability Insurance. The General Liability Insurance covers for bodily injury, property damage or personal injury occurring during the Contractor’s operations and on completed operations. This creates overlap with WorkSafeBC coverage (that must be held by every contractor and subcontractor working on a project) onto which the homeowner must be added as an “additional insured” party.
At the point that the site is fully prepped and footing/foundation framing is about to begin, Course of Construction Insurance must start. This policy will run throughout the project, past lockup until full completion, and protects against any direct physical loss to the building under construction. It covers construction materials stored on and offsite, as well as those in transit. The limit of insurance must be 100% of the cost to rebuild the finished structure, and it’s important to note their common clause invalidating the policy if no work is done for 30 days. A Course of Construction policy can be initiated by either the property owner or the builder; however, the cost of the policy, as well as the ultimate financial responsibility should inadequate coverage exist, are borne by the property owner. Upon completion of the project, the Course of Construction converts to standard home insurance held by the owner.
From Gord Thompson’s years of experience, he warns of what he sees to be the most common mistakes that property owners building their own homes make:
Not notifying the insurer about plans to build a new home: many home insurance policies can be extended to new construction
Not starting the insurance until after the home is framed: insurers will charge back to the date framing for foundations started, meaning no savings by delaying the coverage. (Fire hazard is highest in the period before the drywall and fire rated materials are installed.)
Failure to clearly identify who is responsible for initiating the Course of Construction insurance
Not obtaining proof of insurance from contractors. The homeowner should make sure she is named as an “additional insured” to all contractors’ liability policies. This proves to the homeowner that the contractor has insurance, and protects her from claims arising from the contractor’s negligence (to other parties).
Not getting WorkSafeBC certificates from all contractors: failure to do so could make the homeowner financially responsible if a worker becomes injured on the job
Not budgeting for the insurance costs which are higher than normal home insurance
To anyone outside the construction industry, the process of building might easily feel daunting. As with any other field, terminologies and acronyms abound, making our lingo sometimes sound completely foreign to people outside the business. Over the next few weeks I hope to shed some light on the standard phases of construction in order to help readers feel a bit more at home with building a home. In this part I have used a sequential checklist format for your easy future reference.