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@jacobmarley2417
@jacobmarley2417 8 күн бұрын
If you are looking for info regarding this topic do not rely on a tiktok length video . There is a lot of directly conflicting information regarding this topic
@neomasha1284
@neomasha1284 19 күн бұрын
Is there a better way to get fresh air without incorporating a mechanical system, provided that it could be expensive in other places? Maybe I don't get this 5th principle could you please explain this? Thank you
@neomasha1284
@neomasha1284 19 күн бұрын
The flow of your explanation is concise.... I will listen to you from now onwards, but please send me a link of the books /notes that you read to get this understanding. In doing so you will help make an excellent passive design expert.
@alexanderzhelev74
@alexanderzhelev74 22 күн бұрын
Thank you for sharing these experiences! The video editing and pacing is superb!
@dianahristova1331
@dianahristova1331 Ай бұрын
Congratulations about participating in the conference. Very valuable video.
@name-rl8tw
@name-rl8tw 2 ай бұрын
Hello. First of all, I would like to say that I liked the video very much and I cannot understand why the number of subscribers is low. I am an energy engineer and your information is easy to understand and accurate, thank you for this nice video. Greetings from Türkiye.
@philipoakley5498
@philipoakley5498 2 ай бұрын
~4:33 what is the units of space heating demand, particularly that last 'a' of kilowatt.hours per (square metre . 'a') ? I don't think it's 'annum'!
@panneverlander
@panneverlander 2 ай бұрын
Dank you very informadive
@siriosstar4789
@siriosstar4789 4 ай бұрын
my house has mass timber walls 14 cm thick. wood fiber insulation on the outside also 14 cm and wood siding over that with air vents behind the siding to wick off any moisture buildup. the mass timber, being hygroscopic , controls humidity swings in the house . the walls and insulation are vapor permeable but air tight . the entire interior has no significant off gassing materials making the quality of the air very very good . opening and closing windows and doors is sufficient to introduce fresh air . we have lived in the house for ten years and it is unbelievably comfortable and energy efficient . our blower test was almost at passive house standards .
@firstdaddy
@firstdaddy 5 ай бұрын
If you plot insulation R factor versus how many BTUs per sqft/hr loss a wall assembly has, the curve flattens out around a R-12. This represents the beginning of the point of diminishing returns. For high performance homes, this is how much your external insulation should be for the best price/performance ratio. If you are going to commit resources to external insulation, R-12 should be your target. To prevent the interior side of your exterior sheathing from becoming a condensing surface during the heating season, you only want 1/3 of your total wall assembly R value to be external insulation. This lands you at a max combined wall assembly R value of R-36. Most of the time you will be better served upgrading the BTU capacity of your HVAC system than adding additional insulation beyond R-36.
@Beeblebrox6868
@Beeblebrox6868 5 ай бұрын
It's a very interesting presentation and I've learned a lot. However, I find the argument in favour of the speaker's preferred active system to be a direct betrayal of the core "passive house" philosophy. Designing a system like that is fundamentally not passive if it required active ventilation/filtering to work! It's just not good enough. You've mandated a more expensive, more technically complicated and breakdown-prone system that many will not be able to afford. I think the dismissal of the 2nd option, extraction ventilation, was not convincing and painted a misleading assessment of its benefits and drawbacks.
@Beeblebrox6868
@Beeblebrox6868 5 ай бұрын
I've seen many descriptions of the importance or value of "airtight" homes, but there's still one thing I don't understand. How do you account for cases of sick building syndrome, or other conditions that are exacerbated by airtight spaces? And given that an important lesson from the Covid era has been that free, plentiful ventilation prevents the spread of illness (especially super-spreader events), how can we justify building airtight living spaces? I understand there are expensive filtration and heat recovery ventilation systems that can be added, but that's a lot more money that most people won't spend if budgets are tight.
@siriosstar4789
@siriosstar4789 5 ай бұрын
Dangerous ? lol , using that word in this context is laughable Hyperbolic click bait .
@AkosLukacs42
@AkosLukacs42 6 ай бұрын
Also factor in the cost of heating or cooling equipment. If you can buy a smaller unit when you have better insulation, that decreases the costs. And probably maintenance and replacement of heating cooling units later!
@AntonDobrevski
@AntonDobrevski 6 ай бұрын
Very good point as well!
@DRCSleaze
@DRCSleaze 6 ай бұрын
Great stuff Anton, a really simple and focused presentation, just what we need to introduce people who are clueless to Passive House principles here in Australia. Would be even better if you could show the actual slides you're speaking to in the vlog, rather than long range shots. Can't really see the details😒
@AntonDobrevski
@AntonDobrevski 6 ай бұрын
Hi David, I`m glad you liked it and thank you for sharing your feedback! I`ll keep it in mind for the next video :)
@Mani6560Xv
@Mani6560Xv 6 ай бұрын
So informative and interesting
@AntonDobrevski
@AntonDobrevski 6 ай бұрын
I`m glad you liked it! :) Thank you for the feedback!
@EireannHassett
@EireannHassett 6 ай бұрын
Nice work Anton!
@AntonDobrevski
@AntonDobrevski 6 ай бұрын
Thank you! Cheers!
@dianahristova1331
@dianahristova1331 6 ай бұрын
Very exciting ❤❤❤
@AntonDobrevski
@AntonDobrevski 6 ай бұрын
Thank you! :)
@cvetitoyoy
@cvetitoyoy 6 ай бұрын
Super interesting! Defiantly interested to see more vlogs from you 😋
@feliciaflinders
@feliciaflinders 6 ай бұрын
❤❤ excellent 👌
@AntonDobrevski
@AntonDobrevski 6 ай бұрын
Thank you, Felicia!
@joaosil
@joaosil 6 ай бұрын
Good video!
@AntonDobrevski
@AntonDobrevski 6 ай бұрын
Thank you!
@jimstiles5278
@jimstiles5278 7 ай бұрын
Nice presentation on the basics of insulation optimization. However I think you failed to really address 'future-proofing' adequately. The low probability of high-impact events leads us to undervalue their expected expense. Furthermore there is great uncertainty of how the magnitude of such events is going to change over time. This leads to great difficulty in figuring out a true optimum. However it is really easy to understand that it matters A LOT that you prepare for all reasonable worst case scenarios you could face. For many such scenarios the correct answer is to 'run away' - tornadoes, hurricanes, fires, and floods (and other outlying extremes) are really hard to prepare for. On the other hand we are rapidly learning how to do this stuff, and it tends to be not that hard. Some of these building features may also aid in preparing for less intense disasters - things like extended power outages, other service interruptions, and other more chronic than acute challenges. These challenges can lead to pipes freezing, deferred maintenance, and other expensive impacts that can be mitigated by insulation or other built features. This is a much more complex optimization challenge.
@AntonDobrevski
@AntonDobrevski 6 ай бұрын
Thank you for your comment, Jim! Indeed you are right, in this video I addressed the best insulation thickness and not The readiness for high-impact events of building. This topic is of course super important and maybe we should cover it in another video. I would be curious to know what do you add to your designs to get them ready for such "worst case scenarios"?
@jimstiles5278
@jimstiles5278 6 ай бұрын
@@AntonDobrevski Hi Anton, I have some thoughts about this, but am under no illusion that my thoughts represent a complete and proper perspective on this question - it will require input from many diverse viewpoints. Since I live in northern Vermont, the insulation-related scenarios of greatest concern to me come from extreme cold combined with service interruptions for basic utilities. One of the key questions in this regard is whether a house has a good, old-fashioned wood stove. If so, the requirement for insulation in emergency situations is reduced. Otherwise my feeling is that the core areas of a house should be able to withstand about 2 days of extreme cold (without electric power) with a very modest drop in temperature (definitions of modest here could vary significantly). Whatever that amount is would probably suffice for avoiding freezing of pipes for at least a week, although this should be checked. This is a very seat-of-the-pants answer, but I have not encountered any scientific- or engineering-based answers to this question. If you do have a wood stove, it would probably still be best to have a house that would not freeze during a week of extreme weather. Maybe that is a starting place? Of course extreme heat is in many ways a much harder question, and I have little to offer there. BTW, thermal mass obviously figures in strongly in this problem area, especially in the case of extreme heat (or - heaven-forbid - wildfire)
@hermannkorner3212
@hermannkorner3212 7 ай бұрын
I'm a great fan of these principels. However one is missing: heat storage capacity ! passive solar gains lead to rapid overheating of a well insulated home, when the thermal storage capacity is unsufficient - even in winter. I would hate to ventilate these precious gains to the outside !
@AntonDobrevski
@AntonDobrevski 6 ай бұрын
Thermal mass / heat storage plays a much smaller role in Passive House projects compared to standard buildings, due to the high insulation levels. Basically, the more energy-efficient the building is, the smaller the role of thermal mass is. Therefore, thermal mass is not a leading factor in the decision-making process for Passive House projects for example when choosing between concrete and timber.
@hermannkorner3212
@hermannkorner3212 6 ай бұрын
I get your point. However: good insulation and ERV only reduce external loads! Internal gains are trapped inside. This is a good thing as long as you need them; otherwise the asset becomes a liability, and heats up the building beyond the comfort threshold. Rather than bypassing the ERV or opening the windows i'd prefer to store the gains in thermal mass for use in the next cold Phase.
@AntonDobrevski
@AntonDobrevski 6 ай бұрын
These principles are applicable for warm and hot climates as well. ERV still helps in hot climates because it keeps the heat outside and the colder (conditioned) air inside. During the night, when outside it's cooler, we can use night cooling or HRV bypass, which helps cool down the building and make use of the lower outside temperatures. Regarding the thermal mass - in warmer climates it's more effective but still not as effective as the night cooling/HRV bypass.
@hermannkorner3212
@hermannkorner3212 6 ай бұрын
I'm with you for the summer case. My concern is overheating in winter, if you combine large southfacing windows with low thermal mass as eg SIP- panels provide. Does that show in PHI simulations?
@johnhanley2431
@johnhanley2431 7 ай бұрын
Your video series is very informative and well done. I am confused by the slide at 6:13. Show the wall construction to add context. What is the best location to install a window? I cannot tell from the image or your verbal description. Green Building Forum, in some places, mentions installing windows nearer the inside so that the surrounding building material is insulated and not near the outside where the surrounding building material is at the outside temperature. That appears opposite to your graphics but I might be confused about what you are presenting.
@AntonDobrevski
@AntonDobrevski 7 ай бұрын
Glad you are enjoying the videos! The shown build-up consists of concrete (grey) and exterior insulation (yellow). So the window should be installed inside the insulation layer to minimise the installation thermal bridge while maximising solar gains, as shown in the video. In case of timber structures, it's recommended to install it in the center of the wall.
@CMCraftsman
@CMCraftsman 7 ай бұрын
I think you did a great job describing the process of achieving an airtight building and you had the control layers in order of importance but I believe the conversation about ventilation should have been at the beginning of the video to also keep the order of importance.
@tealkerberus748
@tealkerberus748 8 ай бұрын
It would be interesting to see the percentage cost increase of incorporating Passivhaus standards into an average new house, and compare that to the cost of upgrading the kitchen and bathrooms from generic to custom. People spend money where they perceive a benefit.
@tealkerberus748
@tealkerberus748 8 ай бұрын
Cute building. I can't agree that taking measures to ameliorate the unwanted heating effect of a black facade is a good choice when you could just not use a black facade, but otherwise this is pretty neat.
@tealkerberus748
@tealkerberus748 8 ай бұрын
That's another point where it all sort of fits together. Sliding windows are preferred for informal ventilation because you can leave them wide open and if the wind picks up the window will be fine - it's well supported by its surround. In a strong wind a casement window can take a lot of damage - either the device holding it open breaks and the window slams against the wall, or the device is strong enough and the full force of the wind is putting perpendicular pressure on the window frame, which is the weakest dimension of its structure so the window frame will eventually break. So if you plan on having your windows open a lot, you want sliding, not casement. If you're moving to mechanical ventilation, you want windows that can be opened for emergency egress but aren't normally left open at all, so it's okay that casement windows aren't good at being left open. And they do seal a lot better when shut than sliding windows. So if you plan to keep your windows shut 99% of the time and want them to seal out the drafts, you want casement, not sliding.
@tealkerberus748
@tealkerberus748 8 ай бұрын
I am not living in a house passively warmed by the sun because in winter when I want my house to be warm, the sun is obscured by heavy clouds and all my big "sun facing" windows just let out whatever warmth we have from other sources. Passive solar sounds great in theory, but in practice in a winter-rain climate it's a very bad design choice.
@tealkerberus748
@tealkerberus748 8 ай бұрын
Towns in temperate climates full of buildings with PV panels all over their roofs should pair very well with a municipal-level pumped hydro storage, if they have a suitable landform available nearby. The excess electricity the buildings put into the grid in summer can be used to pump water up to the top of the hydro system, and in winter they can draw that power back - and rather than losing power in storage like normal battery banks, in winter they should be gaining stored power from precipitation.
@tealkerberus748
@tealkerberus748 8 ай бұрын
Speaking from personal experience, the supply and exhaust need to be balanced for every room. Otherwise as soon as someone closes the door/s to that room, the air movement is going to slow or stop, because the only way for air to get from one room to the next is under the door. If there's a draught under the door, you'll get that much air movement, and if the door is fitted not to have a draught, you'll get no air movement at all. Closing the bathroom door while we're using the shower or toilet, or closing the bedroom door at night, is normal human behaviour. Humans like privacy in these spaces, and the closed bedroom door is a "do not disturb" sign that even cats have to respect. The ventilation needs to be built on the assumption that when ventilation is most needed, the door will be shut.
@AntonDobrevski
@AntonDobrevski 8 ай бұрын
To avoid oversizing the system, paying too much for ducts and drying out the air inside, supply and extract should be separated in two different zones according to the cross ventilation principle. To allow the air to move freely even at closed doors, are provided transfer openings either at the doors or in the walls. These openings can be designed to avoid the transfer of noise/light. The air volumes are quite low and don't cause any drafts (with the right seizing of the openings).
@tealkerberus748
@tealkerberus748 8 ай бұрын
We don't have any moisture problems in my house in winter because for the past five years we haven't been able to heat it - it's designed to heat from a wood burner but I can't split wood any more - and outside the summer heat I keep my windows wide open all year around because claustrophobia. I would like my next house to keep itself warm without requiring work I'm not able to do, and at the same time I need it to ventilate itself so I can breathe comfortably while being warm.
@tealkerberus748
@tealkerberus748 8 ай бұрын
When you start talking about architects designing net-zero housing for government housing for low-income households, you're talking my language. The people who can least afford energy bills are the people who most need houses that generate at least as much energy as they consume.
@tealkerberus748
@tealkerberus748 8 ай бұрын
Heat lamps kill an awful lot of chicks every year. They catch fire desperately easily in an environment full of wood waste bedding and cereal dusts. Good farmers these days use thermostatically controlled heat panels that won't start a fire even if they're buried in sawdust. The only light they need to produce as a byproduct of keeping chicks warm is a single LED to say the device is powered on and working.
@tealkerberus748
@tealkerberus748 8 ай бұрын
Lungs also are airtight but well ventilated. They work a lot better if they don't have holes all over them leaking uncontrollably.
@tealkerberus748
@tealkerberus748 8 ай бұрын
I live in a climate where it's hot (tops of 43 C) in summer, and cool the rest of the year, rarely dropping below freezing but even now in the middle of Autumn it's in single digits every night. What I'm being taught in class is that we shouldn't use vapour-impermeable barriers anywhere in our walls, because whether that barrier is on the inside or the outside of the insulation envelope, at some time in the year it will lead to warm moist air infiltrating through the insulation and hitting the cold vapour barrier, creating condensation. So the recommendation is to have vapour-permeable materials all the way through, and focus on stopping air movement so the only way vapour moves through the wall is by permeating through each layer, not carried wholesale by an air leak. The question I'm grappling with, is how well will this actually work? If the amount of water vapour inside the wall is only what's been able to get there straight through the plasterboard, and then it passes through the insulation to the outside - say a cement sheet cladding - will it pass through that too, or will it get cold enough to condense and drip down inside the wall anyway?
@AntonDobrevski
@AntonDobrevski 8 ай бұрын
Every building must have an airtight layer. By having the airtight layer, the only way for moisture to move through the wall is via vapour diffusion. In general, it is recommended to use intelligent airtightness systems which are vapour open in one direction ( e.g. allowing the structure to dry out to the inside) and vapour closed to the other side (e.g. not allowing the internal vapour get into the wall). An example is the pro clima intello plus system.
@tealkerberus748
@tealkerberus748 8 ай бұрын
Note that at the current accelerating rate of increase of carbon dioxide in our atmosphere, by the end of this century the air outside will not be useful for ventilating our houses. We need to be designing ventilation systems that will be able to be retrofitted with some form of mechanical or biological decarbonation and recirculation in order to provide healthy indoor air quality.
@AntonDobrevski
@AntonDobrevski 8 ай бұрын
Additional filters/modules with filters can be added to the outdoor air duct of MVHR systems which can address this issue.
@tealkerberus748
@tealkerberus748 8 ай бұрын
As a matter of interest, for those of us who watch with cc on, the text you put at the bottom of the screen is completely covered by the cc.
@AntonDobrevski
@AntonDobrevski 8 ай бұрын
Thanks for the feedback. I will have it in mind.
@tealkerberus748
@tealkerberus748 8 ай бұрын
Of course if you're designing your house off-grid, then the price of electricity is no longer a factor in your calculations. The balance is now between the cost of the extra insulation, or the extra solar panels to be able to heat your house in winter, or cool it in summer, whichever requires more panels. Considering how much less power I get from my fifteen-year-old solar panels now than I did when they were new, I think the assertion that they need to be replaced every 25 years is probably not far wrong. Fortunately, insulation shouldn't have that ongoing expense.
@AntonDobrevski
@AntonDobrevski 8 ай бұрын
Good point. Battery cost/maintenance is also a significant cost-factor for off-grid houses.
@tealkerberus748
@tealkerberus748 8 ай бұрын
Ehh, don't forget that the amount of new carbon dioxide released into the atmosphere every year is still accelerating. Find the "worst case" forecast for how ambient temperatures are going to change in your region over the next 200 years, double that, and then insulate to make your house habitable in those conditions. The modern building industry likes to assume a 50 year design life, but I don't see a lot of people bulldozing their 50 year old houses to build new. The next buyers might add some insulation, replace the single glazed windows with double glazed, and repaint, but then they go on living in it. A 200 year design life really needs to be our minimum, and for high-quality houses more around 500 years. If you don't think your house will be fit to live in by then, why not, and what can you change to fix that?
@tealkerberus748
@tealkerberus748 8 ай бұрын
I appreciate the eggplant emoji for the size comment. Energy efficiency is a very serious subject, and if we don't insert some humour from time to time it can get quite exhausting. Give us the giggles!
@tealkerberus748
@tealkerberus748 8 ай бұрын
Good explanation. Now, how do we insulate a 40mm timber door without making it so thick it feels like a bank vault, and without using petrochemical foams?
@AntonDobrevski
@AntonDobrevski 8 ай бұрын
Doors and windows of old existing buildings should be replaced, if possible. You can find high-performance components here - database.passivehouse.com/en/components/
@envueltoenplastico
@envueltoenplastico 8 ай бұрын
Really informative, thanks! I have a very old stone and lime mortar house, which only adds to the complexity of trying to make it more energy efficient. So I am trying to learn all about that at the moment :)
@pathfinder509
@pathfinder509 8 ай бұрын
Kind of seems as though you aren’t differentiating between walls and ceilings/roof insulation
@AntonDobrevski
@AntonDobrevski 8 ай бұрын
Tha aim of the video is to shed light on the importance of insulation thickness and the return on the investment. Walls, roofs and floors usually have different thicknesses indeed but this should be determined based on an energy model of the specific project.
@bobbray9666
@bobbray9666 9 ай бұрын
The amount of insulation depends on the climate you live in. I wouldn't have R-30 walls in Texas but I would in Minnesota. We can have a delta of 80-100F between inside and outside temps for 3 months up here.
@AntonDobrevski
@AntonDobrevski 9 ай бұрын
Climate is one of the factors. As mentioned in the video, there are also other factors such as building size, price of insulation and energy, material type etc.
@matterhart
@matterhart 9 ай бұрын
Awesome job on this video
@AntonDobrevski
@AntonDobrevski 9 ай бұрын
Thank you!
@iareid8255
@iareid8255 10 ай бұрын
Much easier said than done. So many buildings are poorly insulated and it is uneconomic to significantly improve their insulation. Renewables also have their inherent deficiencies, intermittency and technical which means that they will not replace conventional generation..
@AntonDobrevski
@AntonDobrevski 10 ай бұрын
If it was easy, we would have probably already done it... That's why this is one of the biggest challenges that we are facing in our century.
@tealkerberus748
@tealkerberus748 8 ай бұрын
@@AntonDobrevski I've been living off-grid with a small array of solar panels and a set of second-hand batteries for fifteen years. The only hard part is getting people who are used to living with unlimited electricity on tap to start thinking about electricity as a limited income which they need to budget just like they budget their money. We would have completed the energy transition already if people were willing to live within their means. Burning fossil fuels for energy is just stealing from our children and grandchildren, because they're the ones who are going to have to deal with the consequence of our self-indulgence and waste.
@qualitybydesign5119
@qualitybydesign5119 10 ай бұрын
Very interesting and well explained. 🇨🇦. Do you like SIP panels as an exterior wall assembly ?
@AntonDobrevski
@AntonDobrevski 10 ай бұрын
Thank you! I'm happy to see you are enjoying the videos 🙂 SIP panels can also be used for Passive House projects and we are working on a few projects using SIPs.
@qualitybydesign5119
@qualitybydesign5119 10 ай бұрын
I’m just completing my third project using SIPs (6 1/2” R37). Thermapan SIPs has never supplied a wall panel thicker than 8 1/4” (R47) even in the far north in Canada. There must be a “Rule of diminishing returns” relating to SIP panel thickness. Passive house standards are R75 which would be a 12 1/4” inch panel
@AntonDobrevski
@AntonDobrevski 10 ай бұрын
@@qualitybydesign5119 If the tinsulation thickness in the prefabricated panels is not enough, then additional external insulation can be added to achieve the desired U-value.
@waltglass7055
@waltglass7055 10 ай бұрын
Hey. Your video is amazing!! I live in Texas, do you have any tips for finding passive home architects to work with?
@AntonDobrevski
@AntonDobrevski 10 ай бұрын
Thank you! I'm happy to see you are enjoying the videos. You can reach out to me at [email protected] about your project and I would be happy to help out.
@vivenreddy
@vivenreddy 10 ай бұрын
Great content. Do you recommend vented or unvented roof?
@AntonDobrevski
@AntonDobrevski 10 ай бұрын
Thank you! 🙂 If the roof space is heated, it is recommended to have ventilation and connect it to a Mechanical Ventilation with Heat Recovery (MVHR) system. This ensures a continuous exchange of air while recovering heat, contributing to both indoor air quality and energy efficiency. If it's unheated, it is still recommended to ventilate it but in that case, it shouldn't be connected to the heat recovery system. On the other side, whether there should be a ventilated cavity in the roof buildup depends on the buildup itself.