Passive House Accelerator
Passive House Accelerator
Passive House Accelerator is a catalyst for zero carbon building. We are a hub for sharing innovation and thought leadership in Passive House design and construction. Learn more at passivehouseaccelerator.com/ Are you new to Passive House? Check out our Passive House Intro: passivehouseaccelerator.com/passive-house
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No comments...wow. Keep up the great work AJ
The Reimagine Buildings video on this project is also really inspiring: kzread.info/dash/bejne/fKF-mKSvgc7RXZM.htmlsi=4ISlqPSkA0Ep4UPh
when 7KW version?
This is really great! From someone who skims along on the brink and occasionally goes over. There is so much liberation in opening up to others about failure. <3 Thanks, Lois & PHA!
I'd recommend this lady visit a properly designed passive solar house... seems like that school just wasn't designed properly, there shouldn't be any sunlight hitting the glazing during the summer if it's designed properly... using a poorly designed installation as the example and then extrapolating that to "Passive solar must die" is pretty extreme and i think does more harm than good.
Can anyone suggest a practical solution for dehumidification/cooling of ventilation air for single family homes? Most dehumidifiers require much more than the typical 100cfm
Helpful. Thank you!
Yes you can, spent a year in an office block just like that - no heating and no cooling.
Blower door testing and air sealing are under appreciated tools for building and remodeling construction.
Save energy = Save money
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14:30 Can someone explain the positives of the refrigerant change? I've heard less effective warming potential, but is that not offset by the additional costs/risks?
Exactly. If it has the potential to cause fires, that’s a huge risk to occupants and offsets its GWP.
Hello. Contact info for the Gradient folks?
not so sure about cross laminated timber but the idea of cork has been bubbling in my head for over a year since I first saw it.
seems to me that the house needs to breath... Evr /hrv do a great job. just enough so the occupants thrive. On the other side of this ventalation is air sealing to keep the house from breathing where you dont want it to. So once you get the envelope sealed up to the size of a 2 x 2 post it note and then add insulation my real question becomes how much thermal mass should a house need to keep the temperature moderated. I live in temp zone 4 midway up the state of Tennessee. Seems like one is either in Reisenger land or up in Canada in the oh to cold freeze your nose off area that people are building and discussions. So one can look at the good enough buildings, net zero / ready homes double stud, or spend enough on closed cell foam to send a kid to college or buy that insulator his new bass boat. Eventually there does become deminishing returns. What I really want to hear is What one can reasonably expect to break even roi on a building that is not in austin or onterio but in a place where I actually have 4 seasons and humidity that one needs to have a decent size dehumidifier installed for those 4 weeks a month that make life interesting to go outside and those 5 days a year when there is snow on the ground
If using the batt insulation in walls, do you still need a vapor barrier with this?
Vapor permeable
Heating season do not last only during the winter but about 6-7 month a year and in the summer you need AC the most for two months. Nothing wrong with building a comfortable house but it is not what passive house about
Love this! Brilliant effort, keep up the good work!
The birth rate is low. The death rate is high. How can we need millions more houses? Are these houses for the border hopping invaders or are these statistics coming from the same bureaucrats that calculate the rate of inflation?
Did you hear the part where he said migration was to Washington? Many people want to leave in Washington. I hope we don’t have ignorant folks like you living here.
US actuaries expect steady population growth for decades to come, even with the recent dip in births. Also, most people are living significantly longer and that trend will continue. Not sure what you mean by "death rate is high" life expectancy dropped during the opiate addiction crisis and the pandemic, but it's trending up overall.
Also, you're not counting all those lunatics that are having huge numbers of children. Theyr'e all gonna have to live somewhere
"We need buildings which are not only beautiful, but also nice to be inside". Very well said. Unfortunately, most of the architects I've dealt with, are only concerned about the external looks, or in the best case, internal looks too. Obviously, "feel good" part for architects is too intangible substance, hard to sell to customers, hard to show it in shiny architectural magazines... I wonder if those architects know that modern human being spends 90% time indoors.
This says the gradient heat pump is $3,800. Is that the expected price of the all-weather heat pump? The regular version seems to be priced at $5,000
KZread Loma Linda University SDA Church 4/26/24
Thorsten Chlupp's work on building integrated thermal storage is really worth looking into. Storage is the key problem with transitioning to cheap non fossil generation. I would not be surprised if we start including ~1m3/100m2 of storage in the near future.
Beautiful video, very explanatory. Regarding heat pumps, what I see done here in Italy (so different thermal zone), in the boiler pass is simply to calculate the demand and spread it over time. I don't know about the UK, but even in cold areas here they generally don't run all day, but for example a certain number of hours a day, divided between morning and evening, at temperatures as said before others. You run them for longer at much lower temperatures, e.g. 65/70 to 45/55 for several hours or even in some cases at just under 40 for the whole day. I am talking about solutions with radiators and not radiant solutions. But from many feedbacks it seems to work very well. NdR the climate zone and usage patterns are different I know. Anyway congratulations video absolutely remarkable and great in the part of the description of thermal discomfort due to excessive glazing.
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THANKS JOHN 🤗👍💚💚💚
Heat pumps are not rubbish, some of the buildings they are being asked to heat are thermally rubbish, therefore they will perform in a rubbish manner. This is a problem of sets; if a fish is an animal, we cannot say all animals are fish. It's maybe also a problem of bias, many/all of the ones you are asked to investigate are problematic, clearly all are not problematic.
I'm guessing you did not watch the video? Sally also mentioned a document that is coming soon from the Passivhaus Trust that explains how to get really good COPs even for poorly insulated buildings.
@@NickGrant I watched the video. To spell it out, the video states in writing and audio that heat pumps are rubbish; the justification seemed to have been the poor thermal performance of some of the properties. That has nothing to do with heat pumps! The application of heat pumps in certain properties is rubbish, yes. Heat pumps are not rubbish. Even if it has a cop of 1.6 it is still 60% better then electric, twice as efficient as gas or oil.
@@GlueChube we must have watched a different video!! Sally is very pro heat pumps even for poorly insulated buildings where the COP can be 4 or more. She is writing a short paper on this that will be available soon on the Passivhaus Trust website. Poor design of systems is an issue thought.
15:11.... summarised at 20:45?
Good times!!!!!
Material cost for the 4 layers of sheet material will be $6 - $7 p/sf. Material cost for 4" Concrete with 4" EPS at about $5-$6 p/sf (dependent on reinforcement req). Big DIY advantage goes to the plywood/EPS system; consider using a Permanent Wood Foundation to eliminate 100% of concrete. PWF also DIY friendly. Perhaps an insulated concrete slab would prove advantageous by adding heat-sink value in colder climates.
Dense packed fiberglass, BIBS, is a better option in many ways than cellulose.
Great presentation
this house's roof is ventilated, on paper.
🙋♂️WE ARE EXCITED TO SEE THIS PROGRESS 🤗💚💚💚
Since single family homes' ductwork on their furnace has an air leakage of 20 to 30 percent. How did you seal the ductwork on your ERV? Making sure it works as efficient as possible.
P R O M O S M
What a GREAT video: love all the practical examples and pictures and advice. SUPER helpful; thank you!
Silicon carbide dissociation is 2700 Celsius and can not be used like a foam agen and your 98 or 99 is fake, based on the color of glass, it looks more glycerin with liquide glass , may contain CaCO3, Recycle glass is max 95 96 even with coal
Thank you for sharing this - it opens the dialogue on this - additionally I don’t think that the government should be regulating how homeowners build their homes- homeowners should provide the plans to potential home buyers and let them make the choice - this movement to use health as a measure to impose rules and requirements that limit society from building their own homes is a subversive agenda-
Also, relying on electricity isn’t smart either- closing your home up so tight that if your fresh air unit stops working- you will be living in stale air- you will still have to open a window - I don’t think the climate issue is real-humans could never overpower the renewable energy of earth occurring perpetually- the fear of outside air and the need to filter it is border line paranoia- the best fresh air is mother nature it can’t be duplicated
It seems that this trend called “passive house” isn’t really a new idea- it’s a simplistic way to building a home only integrating more electricity in our time- I think building homes over generations took a downfall -and quality was lost-the old homes in the Caribbean countries are built in this similar way withstanding weather and time-I think this is being overcomplicated -
All well and good living in Canaday.. I live in the middle of Tn zone 4 seems that no one ever actually talks about any of this building in this part of the world.. Like how much insulation how much exterior insulation.. how much in the roof structure.. what kinds of weather and air barriers needed.. It certainly is frustrating.. WE get one to two weeks of teen to 20 degree days.
"Service Hot Water" is the term for the use of a water heating system that is not the same as the Domestic Hot Water system, creating the need for the two different terms; DHW and SHW.
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Sometimes I wonder how this all fits together- windows are the biggest thermal bridge of all time, including triple pane euro windows. All this effort and yet few people build monopoly houses and even fewer people submit to dark houses.i esp scratch my head where someone designs a “passiv house” that has several skylights ! And who forgoes all can lights on a second floor ? And if the goal is a healthy environment, how could you possibly consider have site mixed spray foam installed ?
"We are an intelligent membrane" lololol
Great video. Love the knowledge that is being shared.
How do they clad the exterior?
Very relevant, thanks!
Great to hear about PTHP manufacturers' progess on making their products more airtight!
Blackwater sourced heat pump. That is a truly outside the box idea. What if we deliver city water to storage tanks in upper floors of the building and use gravity to feed the units and inline that riser pipe install a hydro electrical generation impeller.