Passive House = 90% Home Energy Reduction!
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- Опубликовано: 9 июн 2024
- Passive House is an incredible building standard for designing and certifying energy efficient buildings (homes, schools, hospitals, offices, etc.). Using the 5 green building techniques explained in this video, Passive Houses need only 10% of the energy that a conventional home uses (that's a 90% energy saving!).
We met up with Alex and Sandra from BCIT's High Performance Building Lab in Vancouver, Canada to learn about the different ways that a home can be built to use less energy. They're pretty simple to understand and don't cost much more than a typical new build:
- Highly insulated building envelope
- High performance triple glazed windows
- Elimination of thermal bridges
- Continuous air sealed layer
- Heat recovery ventilation
The building lab at BCIT is a really exciting new space where tradespeople can come to learn about green building techniques. To learn more, check out this link to their website:
www.bcit.ca/zeroenergybuildings
We want to say an extra special thank you to Sandra and Alex for taking time to show us how all of these building techniques worked (late into the evening!). We had a blast and learned so much!
Sandra Rohler
Passive House Instructor
BCIT High Performance Building Lab
Passive House Canada
Alexandre Hébert
Manager, Zero Energy Buildings, BCIT
Thanks for watching!
Mat & Danielle
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VIDEO CREDITS
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Music & Song Credits:
All music in this video was composed, performed, and recorded by Mat of Exploring Alternatives.
Editing Credits:
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Хобби
Her looks, demeanor and voice are just so peaceful.
2:20 1. Highly insulated building envelope. 5:20 2. Continuous air-sealed layer. 7:00 3. Eliminate thermal bridges. 8:04 4. Heat recovery ventilation. 9:27 5. High performance glazing.
Took me days to watch this video because the womans voice was so soothing and kept putting me to sleep
How about passive house design in the equatorial area where the aim is to reduce energy depency on cooling (instead of heating) when the climate is hot & humid?
Windows and building orientation will do. Insulations will lessen the heat as well.
Could look into geothermal ground loop cooling.
Cover every available surface with solar panels and then install super-duper high efficiency air conditioning. If you want to see that on steroids, go to Maui.
I believe insulation not only keeps your house warm during the cold days, but also keeps your house cool during the hot days. As long as heat gain is prevented and proper ventilation is installed it should be ok.
The concept of building orientation will only work if there is no space limitation. Given sa small land area, it might not be doable all the time.
Fun to see...
Here in Denmark, carpenters and other craftsmen are trained in energy saving construction. 😀
yup. what she is talking about have been the building standard since the 90s here
Crosslaminated timber wood is amazing. The Austrian movie archive was made from wood. First the chemical from celuloid Films doesn't affect the walls (concrete can be damaged by the chemicals)
The Inspiration of the thermal management was inspired by anthouses in the woods
Fascinating. She provided great explanations, even I could understand! :) Thank you for sharing.
You're very welcome, I'm happy you found the video interesting and easy to understand. Thanks for watching!
@@ExploringAlternatives nZEB (near Zero Energy Buildings) is the standard in EU FOR ALL NEW HOUSES from 31.12.2019. !
ya?
I absolutely love this video. A look into the inner workings of various surfaces for insulation purposes and the mechanization/electronic support to maintain it is very helpful and long awaited. Thank you!
Fascinating. I'd love to take an on-line course on this so I can really get to grips with the ideas.
This was needed hopefully it becomes a world standard!
You can go way further with modern construction methods! But agreed, such techniques should become mainstream, but enforcement is often badly managed, putting arbitrary rules over objectives.
Only in the advanced countries lol
Alexander J You don’t need to go further, at some point you lose cost effectiveness.
passive house is great!
@Furious you can just build a monolithic dome, and it's more efficient for much less money>
So cool and amazing! I had no idea you could make a building so energy efficient. Thanks for sharing.
That was Siiiick glad to see how true professionals chasing excellence is alive and the passion for excellence
Excellently said
Thanks! Great topic! More of this please! And congratulations to all of you! ;)
Sandra Rohler is amazing in her ability to convey the meaning of Passive houses.
Great video, very informative! Well produced video!
Very clear presentation. Thanks.
Thanks Pat :)
Great video. House construction in Australia is a joke. Passive house design is key to our sustainability.
michaelcsutton
Exactly right. We waste so much of everything, not just energy. Hell every time a baby or dog poops it gets placed in a plastic bag and thrown in the trash. We need to develop sustainable practices.
But at least there are good windows available on the market. Guys from Astellite in Melbourne replaced my aluminium rubbish windows with uPVC and it is amazing to experience the difference.
No - the key to sustainability is zero growth population.
Craig Wheeless... so true and so much plastic wrapping on our food too.
TheEarthDoctor1 - Yup. Australia is about 20 years behind Africa when it comes to windows and generally most of the things. People here don’t know the quality. Pretty sad.
Great tutorial and a lovely teacher, I'd sit contentedly in her class every day.
Succinct and totally clear. Very well done.
Thanks so much, happy you found the video helpful :) :)
Super informative video. Plus
i could listen to that lady explain this stuff all day.
Above Board Carpentry in Minden, Ontario has adopted this as our target market. What is great is that we can build these homes for nearly the exact same as a conventional home.
Really dense video with great information. Great job.
Thank you for the incredible videos. Quality stuff.
So fascinating and informative!
Some great info here! Here at Westeck we are happy to have joined the Passive House movement!
That was really neat and informative. Thank you.
Good video. Recent home built in Rochester, MN IS 0.7 ACH combined with solar gain and it rocks!
Exceptional, thank you to all involved
Thanks Drew!
do you have solution for tropical climate building?
@@romeonieva4438 nice question. And even, two years since it's asked, no answer?
great video as always, best quality videos 👌
That's great, thanks for sharing!
There are variations of passivhaus in europe . For example , i have a blockhaus that has 13.5 cm blocks/logs and 14 cm holz insulation panels with 3 cm thick lattung / furring strips over the insulation panels with 2.5 thick wood panels mounted on the furring strips. Windows are triple pane tilt and turn.
People also use CLT panels in place of logs . All building materials are non off gassing as well as furniture , bedding ,drapes rugs etc which are from natural fibers . We did this because we don't have a heat recovery system. We just open windows in the morning in the bedroom for a few minutes and while cooking. The loss of heat is not an issue because we have a two ton speckstein offen / soapstone masonry oven and have tons of available wood to burn. The oven/ stove is heated once a day in very cold weather for about two hours and then holds and gives off that heat for about 24 hours. It heats the entire house of over 3 thousand square feet to a comfortable seventy degrees or more.
Passive hauses came from europe.
I am so excited about this concept! I am a Realtor in Dallas, Texas. I have the First Certified Passive House in Texas listed. Where the requirement for certification is 0.6 ACH, my listing has 0.392 ACH. It is awesome. I hope it catches on here! It would make the world a better place if this became the standard.
We really enjoyed your video thanks for sharing
Thanks for sharing this video....very informational.
Was building one a week back in the 90s with the crew when i first started work after school over here in Germany.
Excellent video.
Nice presentation! One thing I notice is that they keep mentioning where they are trying to keep heat IN the building. This is true in a colder climate. I live in the desert (Phoenix Arizona) where the opposite is true most of the year. This same passive house building techniques would apply here too. They should mention that as well ;-)
T Jam heat or rather the optimal living room temerature. Same rules apply only windows should be on the opposite side
I would like to add that the heat differential is typical much greater in cold climates.
T Jam Yes, and add reflection and passive wall ventilation.
@@Conservator. "passive wall ventilation" ...noup, you don't use passive ventilation in a "passive house". All air circulation is handled by controlled in/out system with heat exchanger (like in the video). In winter incoming air is heated with outgoing air and in sommer the opposite. It's possible to add underground piping for incoming air, so the air is preheated/precooled before coming into heat exchanger.
I built my passive house in 2004 in Nordic Countries (Finland) and basically all new houses there have been like presented here, for a decade or two. So welcome to this century for others too
Timo Grönroos Hi,
Thanks for your comment. Heat recovery by heat exchangers are very important especially in cold but also in milder climates like here in the Netherlands. And yes that requires an active system.
I was referring to hot climates where sometimes hot air can be ventilated passively by letting it escape at a high point and having an inlet of cool(er) air at a low point. It’s a bit like a chimney. During colder nights the airflow could be reversed.
I like the concept of having underground pipes for heating and/or cooling air in the winter and summer. Could you give me an idea of the size, length and depts of the air tubes used for such a system? I plan to build a small workshop in my garden and I would like to make it as energy efficient as I can. That is, without braking the bank. Any hint would be welcome. Tia.
This video is very helpfull... tnxx
Thank you for creating that video. So useful an interesting!
Love it can't wait to build one.
7:55, even if you offset your studs in two different layers, it is still a thermal bridge. Just less bad. Usually it is good enough. Depends on the properties of what is the middle layer that studs on both sides connect to. Other option is uniform insulation on external walls, with no seams or penetrations. This is commonly done in Europe.
This feels like one of those videos you see in orientation at a new job.
For the first time it makes sense how you save and recover energy
_To everyone interested on the matter, here is a short global overview with parallels to the situation in France (not trying to sell it, I just think the history of one country makes a more understandable example for picturing the global situation, and France's history on the subject is the only one I really know about):_
*Passive housing and Passivhaus*
* Some techniques for passive housing might be new, but it has been around for as long as traditional housing, which always had had techniques for keeping the cold or the heat outside. You can summarize the idea by thinking of it as a way to keep the inside temperature independent from the outside temperature, and taking advantage of the sun for heating and of the earth for regulating the inside temperature.
* The _Passivhaus_ label is most probably what popularized the concept in its modern meaning. The research started in response to the oil crisis of 1973, the biggest advance upon traditional construction being the findings about the importance of air tightness (mostly thanks to swede researchers). The first project was constructed in 1990 in Darmstadt, Germany, and
* The label and its techniques became quickly widespread in German-speaking and Scandinavian countries. It is interesting to note that the industrial standards in those countries also evolved to answer the demand (e.g. for windows). This means that passive construction technology is now quite mainstream and more affordable there than it is in country where the demand is more recent.
Find a historical review here : passipedia.org/basics/the_passive_house_-_historical_review
* _If you take the example of France, the RT1974 (thermal regulation of 1974) was also a response to the oil crisis_
*What's next?*
1) NZEBs (Nearly zero-energy buildings)
* European Union is asking its member countries to to draw up national plans to increase the number of Nearly zero-energy buildings :
the "Energy Performance of Buildings Directive" requires all new buildings to be NZEBs by the end of 2018 for public buildings and by the end of 2020 for all other buildings.
* _If you take the example of France, the RT2012 (thermal regulation of 2012) is already trying to tackle this matter_
2) ZEBs and Energy-plus housing
* Zero-energy housing means that there is 0 energy input
* In variable climate zones, this is very hard to achieve which is why the needed energy compensation is produced by (often local) renewable energy. For the house never to lack energy, these renewable energy sources often have a higher mean production than the building would actually need (e.g. solar panels will work every day even if you only need them in winter). This leeds to a new, localized energy management which can allow energy use for other uses, mostly transport (electric cars). This concept is called Energy-Plus housing.
* _If you take the example of France, the RT2020 (thermal regulation of 2020) is supposed to make Energy-plus housing the new national standard._
If all of this stuff seems interesting to you, you might want to take a look at other widespread labels, such as : LEEDS, MINERGIE-P, 2000W Society
_I guess the reason for me to write all of this is my frustration when I read most of the comments around here :_
-> _Yes, passive houses are great ; Yes they should become standards, but as a matter of fact they already became standards in some countries and are already being reviewed for better/stronger ones ; they are far from being a new revolutionary technology._
-> _Labels but mainly regulation are a very important part of these evolutions, and it is crucial for any country to make them intelligently. This means setting the right requirements and adapting to the climate, and still allowing room for further innovation and experimentation._
-> _If you don't have a problem with heating but with cooling, the same methods apply, but your building orientation (the way you use the sun as heating source) will change_
-> _Higher construction prices are in no way a counter argument when you can spend less energy over the full lifetime of a project ; only the overproduction of grey energy or new pollutants could be arguments against higher performance insulation_
Sorry for the long comment...
Last but not least, I want to thank Exploring Alternatives for their awesome channel and the subjects of their videos. Keep it coming guys!
Alexander J
Thank you for your comment!
(I’m a bit surprised to be the first one say so but I’m sure many more will have thought the same. Merci!)
Thanks for this vid. At 1:30 she says upfront labor is 3 to 10% more than conventional construction. I think most people would also like to know the extra material cost as well.
i feel like i want to go straight away to their workshop to learn more!
I live in a passive house since 2006. And I really don’t understand why so many people still build houses with a chimney
$
How do you heat your home? And where do you live?
@@skarletlightning Actually, costs of building chimneys are one of the reasons that in new-build energy efficient houses, heat pumps are no more expensive upfront than gas boilers (and they're obviously cheaper to operate).
Because you need heating.
Thank you for sharing this video. I was wondering if something similar is being developed for tropical countries where cooling is more important than heating--- the sun shines 95% of the time.
The concept of the house is mainly similar, you have to just add an underground heat exchanger or if you have access an underground body of water ( aluminum tank or even some underground well ).
great site… I would like to share you should add a tightly fitting piece of Masonite siding into all the window sills under the membrane to create a pitched water shed for a rock solid water proofing
I don’t recall the name of the woman engineer doing most of the presentation/demonstration, but she’s incredible! He approach to explaining things was fantastic and made the building techniques very understandable. Just amazing!
Very cool information!
Fascinating!
Living in Northern Ontario, this style of home build is a must! We currently live in a 100-year old+ house and heating is a nightmare. We have been working at implementing these same principles on the envelope renovation and we have noticed a massive difference!
Is it possible to find out what brand of barrier tape the black tape is? It looks like fabric? Maybe I am wrong. Thanks!
learned about passive houses in my secondary education almost 15 years ago and the concept was not super new then, not really much that can change aside from reducing the production cost of the materials to make the early investment pay off sooner.
Windows are a interresting part, early on they were a huge heat loss due to not beeing air tight, then they became air tight and led to condensate building and therefore mold creation and in the passive house you have the air tight windowframes and avoid the mold with the air ventilation system.
I kind of miss the mass that stores energy here, like for example a thick brick wall in the center of the house, that gets light through the south windows in winter. but maybe storing all the energy in the air is enough if you have enough insulation, since simply people and animals beeing in the house create heat.
in school we were joking to put a 20cm (~8") mirror around the walls on floor level, so the cats will get scared all day and run around to create heat^^.
still i prefer building a earthship someday though the passive house can tackle the regulation jungle far better.
No use having thermal capacity if there is no sun to heat it. During overcast periods when cold your 'mass' will rob the heat from your body. And most materials traditionally used for thermal capacity are very slow, unresponsive and have poor energy storage capacity, as useful heat exchange only takes place in the exposed 50mm of the material.
With global warming, we already have a situation where thermal capacity becomes saturated during periods with sustained high day and night temperatures, making indoor conditions unbearable for humans (better outside in the shade away from radiating materials). Night time cooling is impossible.
Rock, brick and soil are quite poor, while Glass and Water are useful thermal storage materials with Water being really adaptable, movable and of course free...
This was really helpful and I'm curious how can we adapt some of these passive house ideas to our existing homes, maybe you folks can share links to other videos or sites, thank you.
Adapting an existing home that isn't already energy-efficient into a passive one would probably be prohibitively expensive.
But it's still possible to make existing houses more efficient, improve their ventilation, and use a more environmentally friendly heat (or cooling) source.
In Ireland there's a retrofit program called "SuperHomes", it's worth reading about if you're interested in that
Great Video
HEy i learned this at school, very valid :)
This will be the mandatory standard for new buildings in the EU in a couple of years actually. I do believe that you can take it a step further by adding solar pannels which could potentially provide all the energy you need to heat and ventilate your house too. I love the video, btw, very informative, thanks!
That was awesome!
Would love to see a video with helpful information on the best ways to retrofit an old home with energy savings ideas.
1. new windows (and adding overhangs or awnings if you need to prevent passive solar heat gain) 2. attic insulation 3. seal all the cracks 4. add a layer of exterior wall insulation. 5. enjoy massive savings :)
So fascinating
I've been reading about energy and rather than passive house technologies it's all about various sources of energy and how we can convert it to electricity, store it, transport it, and use it in the home. In my reading/RUclips-viewing I recall that a huge percentage of electricity is lost as heat to the air at the generation plant or transporting it or in the home. Though she said heating the passive house can be done much more cheaply than usual, she didn't discuss water heating (approximately 2/3rds of the electricity we use is for water heating and to heat or cool a home). A book-end video on the more complete home which is passive AND includes electricity saving techniques or appliances could be really useful.
Videos like these make me wish my brain was half as active and smart as these people.
Saving energy saves money on utilities and makes a home more comfortable.
What kind of material do you recommend for wall and floor and roof thermal insolation? Besides mineral wool and plastics like XPS.
How good are these homes for cooling?
And what are your thoughts on concrete homes
I wish I could finish the half constructed house that my dad left me this way. For the lower part first two floors its mostly 15 year old aerated concrete and basically wood + rock wool for the top two floors and attic. Yes our house is humongous and I have what so ever 0 idea what my dad was thinking when he started building a house this large in his mid 50s... lol
love how they talked about how the structure would retain heat.. but mentioned nothing about cooling a structure.. thats where the real test of a green construction happens.. because after all.. if a building is cold in winter one can ALWAYS bundle up.. but in summer theres only so much layers we can remove in an attempt to stay cool... not to mention its always been cheaper to heat than to cool anyways...
They didn’t speak of cooling. Where I live during the summer we have consecutive weeks of 90 degrees F weather. And this can slop over into the spring and fall. Our concern is cooling.
Mary Ann Lee same measures with a few different dispositions regarding orientation. What can keep the heat inside can also keep it outside :)
@@alexanderj1316 What system do you think is best to deal with this problem? A system that creates even more heat outside just makes the problem worse!
@@greengenie7063 it does not create heat, it just keeps it outside. This is a basic principle of insulation. The building hull is optimized to minimize heat conduction, which means that the balancing of the temperatures between the colder and the warmer side will take more time. It can thus work both ways.
@@greengenie7063 Did I get your question right?
@@alexanderj1316 Superinsulation, shading and air-movement are all fine. I'm glad you are not promoting air conditioning!
How well does this work on the Gulf Coast? We have high cooling loads but also needs lots of humidity control.
Smart lady.
I need opposite of what you have here. Temperature rises up to 40-45°C in my country. Is there anything for that?
Having an airtight envelope, a heat/energy recovery ventilation system (in this case, it works to recover "cold" from the inside) and eliminating thermal bridges would still be important.
You'd probably still need some form of air conditioning, but thanks to the above steps, it'd need to be much less powerful.
As such, you could probably power it from photovoltaic panels quite easily.
Also, one interesting alternative to regular air conditioning is "ice water" air conditioning - basically, you have a heat pump that cools down water to 0'C, and passes it through special radiators with fans.
But on small scale it tends to be more expensive upfront than regular air conditioning.
How is the soundproofing between units? And fire safety? Thanks! 😊
My dream would be to build a passive and eco friendly home. 😍
May Allah bless you with what you desire for, and if He doesn’t, may He give you better.🙏🙏🙏
Got there. Good. Here In Europe they use it quite a while now but also it was found recently that even tho the idea has many great features on a long therm base it is not sustainable. The problem with passive houses that u need to follow really and I mean REALLY strict principles as a GC and builder to achive the passive function. Also you need way way more air and heat related structure and automaton to controll the air tight system of the passive structure. The amount of money spent on it just simply does not worth to calc with it. If you would in general plan a Low energy house that would cost less than a passive and would not need any extra costy pipeing. Also on passive houses the economic payback can not be determined exactly while on low energy houses they are calcable.
Lime mortar houses are the best!
thanks for the explanation. I have a question regarding this video. what should I consider to build a passive house back home in Saudi Arabia and who to deal with heat gain regarding of that??
Yes the only thing that changes is you want less passive solar gain. So focus on more windows north and little to no windows in the south. Heavily insulated will keep cool in just as well as heat.
Still makes me wonder why we haven't update building codes fast enough to take advantage of this knowledge.
Cost is higher to build them.
While power companies still make profits they will discourage energy efficiency. Retrofitting buildings will be popular when people make their own energy, eg. Solar. Great video.
and how much the construction cost increases for this 5 layers super-insulated enclosure?
Nothing beats dome homes.
This is fantastic! I really would like to know how much more expensive a passive house construction would be in comparison to an identical conventional construction with the same layout.
This will depend a lot on your country / region's standards. Quite a few studies on the subject can be found out there.
Next time you guys are in Seattle, my place is open (with parking).
They might prefer public transport!
(Just to tease you a bit;)
Im looking to build a super efficient low income rental and decided to go with Prosoco fluid applied air and liquid barrier instead of tapes. Tapes fail.
Oh, one thing that should be emphasized when describing a passivhaus is the " Comfort " factor . This is not something that can be measured but it can be experienced and when it is experienced it oddly becomes the biggest selling factor.
We ask for peoples opinions that come to our house for the first time and invariably they all comment on how comfortable it is.
All well and good but how does it do anything to effect all the houses we already have?
So..Are there any special requirements when it comes to cooking equipment? I like to cook and bake, and I'm wondering if I'll end up roasting myself, especially in the summer time?
Any recommendations for a Florida hot and humid, hurricane climate using concrete?
ICFs are very common and can hardly be beat for the application
love it
Passiv-haus is very ACTIVE. I like true 1970's passive - more robust, low cost and simple.
green genie Passivehaus is not active. Apart from the HRV system, achieving Passivehaus standard doesn’t involve any active parts. Unlike the 1970’s Passive Solar homes, Passivehaus negates the possibility of overheating - which happens in many of those early passive solar homes. Passivehaus incorporates passive solar, of course, but methodically and cohesively with all the other aspects of the home.
NUTS. So you think fish and chips is vegetarian, apart from the fish!@@mhorgan1515
Wow.... Very informative and inspiring, I'm reeling with ideas and questions. #1 In about a year or so I plan on converting a truck to live in full time (RV'ing, Tiny house on wheels...) Does it make sense to use passive house techniques on this type of build?
Hey "KoKo", it's always a good idea to seal your envelope to better regulate the conditioned space. The problem is that with making the home air tight you also must account for airflow. You don't want stale, stagnate, toxic air to collect in any space let alone a small space like an RV. However, an RV has plenty of windows that can be used for this purpose. There are other PH techniques, like window shading and rainwater collection that have been used on RVs as well.
What are some some cost effective strategies for people in tropical areas( high temperatures and high humidity)?
a revolution!
I find it interesting that she is constantly talking about heat loss, as climate change gets worse the energy demands of cooling are going to triple. Even worse, in places were aircon is not common (Europe) people are literally dying from the heat. This house looks well insulated but I hope that it is also cool- a lot of houses in the Europe have no awning or overhang on windows and are designed to hold all the heat- I actually find them quite stuffy. People are dying in their homes in the middle of summer. I am curious to see how these hold up in the heat (especially long stretches of heat- like a month of over 30 degrees, which is normal in most places). Of course, insulation is a good thing but we need to start thinking about heat protection along with preservation.
no, we are in for a decade or 2 of global cooling due to sun cycles
Keep in mind that BCIT is located in Vancouver, Canada. And they are mainly focused on the Canadian market. Vancouver rarely goes over 30 degrees in the summer.
Can you construct a passive house using light grade steel as opposed to wood frame. Please could you point me to the relevant information sheets for insulation etc. and how I would eliminate thermal bridging. Look forward to your comments. Thank you.
What would the opposite of a passive solar house be? I live in the Caribbean and I want to know how to build my house so that it is strong (to withstand hurricanes) but cool.. the level of heat in my country almost feels unbearable at times.
can be helpful, if we do not live in a huge home, and are attached to neigbours homes, and have the ground floor built partialy below the ground level, then the heat losses are reduced
I want more about exceptional wather efficiency and foundation effitience for a quebec environment and other things we don't think of.
It looks like the actual wall assembly is a inner 2×4 wall that is sheeted with a 2x10 wall on the outside? I'm not sure her numbers on material cost are accurate if this is the case.
I'd love to build a passive house myself. Has there been any calculation to the impact of additional lumber used for those extra thick walls??? Economically and environmentally...
Where are the SIPS home design? Get away from stick frame! Use sips walls on the exterior and roof! We didn't see any in this video??
using wood is the best thing you can do for environment because its carbon capture
@@magnumopus9058 too much of a simplification. i had a neighbor in Idaho who had a log cabin that burned 10 cords of wood per winter! wood is not that good of an insulator
@@MrMaddogg2010 sips aren't necessarily cost-effective for roofs. blown fiberglass or cellulose can be much, much cheaper
@@BrianKrahmer when i said using wood i didnt mean to say use it when building a cabin. Wooden furniture is good for carbon capture
Need this kind of professionals in Portugal. We really need to improve portuguese quality constrution.