Next house you'll for sure design with overhangs like the rear balcony. They can be sized to allow lower winter sun to come in but shade the windows when the summer sun is higher.

Bijorn, You MUST look to manage the sun from the outside to control the heating of the home BEFORE it comes inside. Otherwise you are paying lots of money to remove that heat once it is inside. Curtains inside are NOT the answer, you need shades on the outside of the home. Either ones that roll above the window or some sort of hanged parasol sheets. We live in the top floor of our home, the heat is bad in the summer, but we are able to control it with exterior shades that stop much of the heat. We are building a new home and ALL the windows have solar shades on the outside because like your home, it's going to be very well build and air tight, that means lots of heat can be trapped inside from the windows (and we have way less windows than you have).

@bjornnyland

29 күн бұрын

That's exactly what I was talking about in this video. Thank you for repeating it so people will understand.

@ChainringTours

29 күн бұрын

@@bjornnyland the cheap temporary fix is buying bulk sun screens and using suction cups to attach them, they won't work great long term, but it's the best temporary solution. I totally get the budgeting issues, we have the same with our build. But the high temperature also is a sign of how well built the house is to trap heat in the winter

@jimjr9143

28 күн бұрын

I Mentioned that already in part 1 as that is what helped me the most in my house . I have around 22 feet total width of windows front of my house . Sun hits those windows all afternoon

@ascendantP

27 күн бұрын

2:58 That's what Bjorn was mentioning here. You need to block out the heat before it enters the home. However, it seems very expensive

Hi Bjørn. I have a fairly new (2018) and highly insulated and airtight house as well (in Denmark). Something I wasn't aware of in the beginning was that the air ventilation system also have fairly high heat recouperation. In the winter you want high heat recouperation but in summer you want the opposite. I can adjust the target temperature on my ventilation system and that helps a lot. I don't nearly have the issues you describe. In winter I set it to ~28C and in summer I lower it to ~22-23C. That means that at night, the ventilation system lets in cool air to lower the inside temperature - and the temperature stays quite nice inside even on hot days. Just a tip. Hope it's helpful.

Awnings on south facing windows Vertical shutters on west facing windows

You can block the sun light using banana boxes :)

Bjorn: 24c is liveable, not too hot *Le me checking my weather*: 41c

@iambenmitchell

28 күн бұрын

Humidity matters a lot. 23° in a humid country is awful, but 40° in a dry country is hot but not as insufferable

Only blocking from outside will really help, i learned it the hard way. Now AC does the Job :)

I haven't seen it suggested yet but in Dubai we tint our windows with the same sort of stuff you tint your cars. The type installed at my home is perfectly clear when looking from the inside out, so there's no impact at night time once the sun has set.

Thanks for the house updates, Bjørn! Of course, I visit your channel for your EV content, but I enjoy your family/misc vlogs just as much. Thanks for sharing!

I have a 2 story house in the "high country" that has no A/C. The West side of the house has terrible heat load. In late afternoon in the summer, the outside West wall temperature can reach 71 C! In July - August, the max air temperature outside can reach 32 - 35 C but night time temps drop down to 10 - 15 C. Our approach is to open the windows once it gets "cool" outside (lower than 27 C) and put fans by the windows to draw in cool air all night. Then close up in the morning (the house interior gets down to about 19 C). The house is "livable" downstairs all day though the temp upstairs will climb to 27 C.

Hiya Bjorn! Aussie here. We have summers that can be absolutely woeful in terms of heat. 40-45c is common. One of the things we do here is we install roller-shutters onto our homes (like the Germans do with their homes.) They go on the outside of your windows and can be electronically controlled. You can also get them in different colours and shades to match your house. Heating and cooling is done primarily with minisplit reverse-cycle heat pump systems. You can get units that mount either to your roof or to a wall. Mine's mounted to my balcony and has three heads that go inside the house. We also install solar film on our windows to reflect IR light.

ZipScreens are really good. Worth saving for them. And if you choose the right colour (dark grey), you can really nicely look through from the inside and still benefit from your large windows. As an add-on, you can keep the window open at night and still keep pollen out.

We make the same systems with a heat pump that can heat and cool. I don't understand why this wasn't possible here? Floor cooling is quite sufficient to cool the house.

@ziggarillo

29 күн бұрын

Condensation would be a problem,if you cooled the floor.

@Hshshsjsjsjsh

29 күн бұрын

@@ziggarillo we set the heatpump at 18 degrees supply so no condensation issues

Maybe plant trees to get shade

@bjornnyland

29 күн бұрын

No an option.

We dealt with the same exact problem. New efficient house with lots of window area in direct sun for many hours. Parasol blocking multiple square meters of window area already did wonders here too and air heat pump installed recently did the rest. It also reduces humidity inside further which should help a lot in practice when July scorchers arrive. I’m hopeful that you’ll get most of the heat issue under control once the heat pump is installed and maybe something for that other big ass window if the final pool cover doesn’t already do enough. One step at a time.

Not sure about Norway, but Amazon UK sells very cheap venetian blinds, around €10 for 1m x 2m (approx). Possibly a better temporary solution for now.

I dont understand why you don’t choose the possibility to get cooling with your heat pump ? You have heating floor that can do also refreshing…

@torakef

29 күн бұрын

Warm moist air condenses on cool surfaces. A nordic style home with underfloor heating and wooden floors and wooden structure would be damaged by cooling the floors. Nibe has a solution where the floors are shut off and baffles are used instead, but not cheap to install!

@MarsPlastix

29 күн бұрын

@@torakef it doesn’t condense if you choose a correct Delta T cooling…

@torakef

29 күн бұрын

@MarsPlastix Delta T needs to be high enough to actually take away the energy too. It can be done but the system is optimized for 9 months of heating, important bits for cooling are not installed. Unless the home owner asks for it and pays extra. Most people install cheap mass produced mini splits and save the compressor hours on the big system til winther months.

@gvaley

29 күн бұрын

You can run cool water through the floor, but at fairy high temperature to avoid condensation, which means the effect is close to no existent. Avoiding condensation at lower temperatures is like balancing a nail on a hard surface. What the owner can do is to run separate lines (+valves, manifolds and everything) for cooling and install convectors. Which adds cost.

@remco6816

29 күн бұрын

We have a similar setup as björn. But we will get an airco/fläktkonvektorer that will be pasiv cooling wich is almost free in energie costs and warms up our ground well for winter use.

Perhaps some awnings over the windows, there's an awful lot of glass.

I am keeping my fingers crossed that you will quickly find an effective solution to the problem. I can well understand the problem, as I spent summers at 28-30 degrees in my last flat. Man, I hate the heat of summer. I wish you and your family the best!

in the Netherlands, you can buy custom-made screen fabric that you attach with suction cups. very affordable.

As an experiment try opening up windows on the coolest room of the house on the bottom level and the hottest rooms window on the upper level..

@PinkDuckUK

27 күн бұрын

It is more optimal to open the windows opposite to the sun on the upper level to convect cooler air through stack effect without importing radiated heat from the warmed building external surface.

@TechnoMonkeyFarm

27 күн бұрын

@@PinkDuckUK The stack effect is going to push to air out of the window on the upper level, so I don't see how it would import heat. The incoming air is from the northern side which should be cooler. Flowing the air through the house diagonally should mean a more uniform temp throughout the house which should aid comfort. May not work at all as the prevailing wind could be in the wrong direction, playing around with different options at different times of the day could produce something tangible. And then there's pollen so he might not be keen at all.

Nice house 😊 Does your ventilation system have a by-pass option for the heat exchanger? Some of them do.

We use reflective metal mini blinds to block sun in summer…very effective for 20 years

oh shieeeet

Maybe you can use your thermal IR camera to investigate the temperatures and heat sources in your house? Also as a benchmark for later when things have improved.

Maybe temporarily cut small pieces of "cardboard" and tape it on the glas outside.. this should be very effective, or alternative "garbage bag" which is black or similar fabric.. All this outside, so UV does not enter in true the glas. As well as humidity outside has a lot to do with how easy or difficult it is to cool down the house etc. Good luck 💪🤓

Interesting Insights, thank you Björn. I never Heard about zipscreens, Here in Germany 90% of the Houses use rolling shutters or rulle Gardiner. How were the temperatures in the old House?

It's a bit late, but you can buy 4 season windows, they reflect heat from high angles (summer time) but in low angle winter they let the heat in. Really awesome tech, but hard to do now as it's a high cost to redo the windows.

Do you have you’re nibe heatpump with the underfloor heating set for cooling? Ore do you only use the portable ac?

I prefer heat over cold, so I' love to live in your house 😁😁 Your daughter is adorable! 😍😍😍

What about your heat pump? Is it running on full power?

The heat pump (we call it reverse cycle) in Australia. Match made in heaven for cooling in summer, as long as you have solar.

@ziggarillo

29 күн бұрын

He has one, unfortunately linked to underfloor heating.

@ALCLCFVIS

28 күн бұрын

@@ziggarillo that can be reversed if the underfloor and heat pump are able to.

@ziggarillo

27 күн бұрын

@@ALCLCFVIS It wouid cause too much condensation

@ALCLCFVIS

27 күн бұрын

@@ziggarillo two things: Underfloor for heating and for heating/cooling are done differently (even the piping is different....or should be); secondly condensation happens with bad installations and/or temperature too low. A new isolated house at peak summer times in southern europe shouldn't need less then 18ºC to keep it cool.

@ziggarillo

20 күн бұрын

@@ALCLCFVIS Exactly, the installation has not been done with cooling in mind, it's not a simple case of adding cooling. The whole installation needs to be redone. And of course this isn't "Southern Europe" But if it was, some parts of Southern Europe have to deal with temperatures up to 48°C (118°F).

We have an air to air heat pump its a nice addition to our air to water heat pump, more efficient and I will take all moisture out of the house and heat the whole house in the winter and can be used for cooling in the summer. However placement is key

At least some foil outside. It made huge difference at my office. Roller blinds or outside shutter would do- i have both.

There are portable air conditioners with two air hoses that go out the window. One draws in fresh air from outside, while the other expels warm and used air back out the window. This might be helpful. Additionally, no underpressure is created in the house.

@bjornnyland

23 күн бұрын

Those are not common in Norway.

@bounty112

21 күн бұрын

We even have mobile split air conditioners here, i once owned one for many years. It's still not as comfortable or quiet as having a regular AC but at least it is efficient. Technically it's a proper split AC just the smaller outside unit is connected to the mobile inside unit with a flexible pipe so you can move it freely. It is not air being moved in this case but the conditioner gas as it should.

Bjorn they are robbing you with these wooden blinds in the bathroom. We have same in Slovenia and they cost 1/4 of a price. I just checked for a big window 1.2m x 2m => 242€. Metal blinds are even cheaper. To keep house cool you need good outside blinds. Inner blinds are way less efficient for heat. But you all ready said that in the video.

Good luck with the financials 💪 though period to pass but it will get better

On second thought, not feeling the zip screen solution Bjorn. Thick drapes that you can open and close, even electronically would be a better move.

Didn’t know about Zip screens. I’m planning on having vertical French blinds, controlled by automation at my patio doors. Had this before. But my house is east/west so open/close makes sense depending on where the sun is.

@Bjørn you should be able to enable cooling mode in your waterborne heatpump. The controller will then make sure to only chill the water to safe levels and not cause condensation issues. This will reduce the effectiveness because the max cooling temp will not be that low, depending on humidity but it should help somewhat. It might be hidden in some sort of installation or expert menu depending on model.

I had solar screens put on for 644 nor krone per window. Always on, look nice, light still comes in. Heat stays outside.

I commented on the last video, but on this one I'll say it differently: draw down all the options you have, all the cost involved in each of them, ideally find someone local that sorts out isolation issues and decide. Even though there's (actually mild now) a lot of heat in summer in Portugal, your daylight hours and sun movemente are "larger" over there in the north, and the building is different. I have a lot of glass too but all the exposed windows are under a "balcony", all of them are recessed compared to the wall (double layer of bricks, double air chamber, XPS in the middle), all (including glass doors) have outside blinds and out of ~54 m2 only ~20 m2 of glass gets beat down by sun in summer time (but get more exposure in winter). I have a pool, also close like yours to the house, but I "tuck" it next to one of the garage walls (no windows), only white paint. It reflects to the pool and not the other way around it.

Nice house, I think a black out curtains will help to prevent heat from the windows, they look nice, much cheaper option...

Your shading must be on the outside in order to be effective. Brille soleil (sp.?) only works well on facades within about 5 degs of due south. Also, they would need to be very large at your latitude and with windows as tall as yours. It sounds like you know that already. It is a shame that overheating doesn't appear to have been (accurately) modelled during the design phase of your build. Good luck with your retrofit solution.

For the aircon, place it outside and attach the hose the blower through a shoebox and some tape

Hi Bjørn, in France a made on demand 2x2m indoor thermal zipstore with battery is less than 400€. Mine come from stores-discount (not so far from home) and are very good ! Maybe they can send to Norway.

Have you looked into window film/tint for the windows? They can block a lot of heat (~85%) while also let light through. I got the same issue as you due to many and large windows and I'm thinking about trying the film instead of awnings or similar. If you have double-paned or tripple-paned window please make sure the film is correct since using the wrong film can cause the window to overheat and break. Edit: The film is intalled on the outside to keep the heat out so it never enters the house.

it is ridiculous to think the indoor temp is the same with 30 degree latitude where I am and norway , maybe sheer is a good idea，very cheap and effective

As a passive house designer in the US is can say the west and north west is the hardest part to design to. Your designer was quite negligent by not anticipating the difficulty of a two story glass wall. That also become a signifigant heat loss in winter. Most of mid to southern Europe has exterior operable shading, but with two story glazing that would be expensive. Maybe the best approch for cost is a fixed horizonatal shading that keeps the view but protects from later day summer sun. On the other (south east?) side operable exterior single story shade may be more practical.

06:00 the kid had the right idea moving the fan. It should point outwards in order to prevent the hot air getting back inside. In any case 25º doesn't seem that high. It's the average temperature for most of the year where I live(in the last few years, before it was closer to 20). I'm dreading the summer, last year it was over 33º for too many weeks.

I have exactly the same mobile AC in my bedroom. It’s necessary to get some sleep :-) Although I have a “normal” AC split unit. When the financials are Better, we will get one more of those for the bedroom.

I have been thinking about the AC solution, just put the unit outside and hosed to inside and set fan to lowest would be more efficient

as always the problem is too little money :) but you could open the windows and use mesh to keep the bugs outside.

You should setup home assistant at some point to get som nice data

@rmkkkk

29 күн бұрын

Integrations are top notch, even trash collection company has integrations :)

You might want to consider “exploiting” thermodynamics. Heat moves up, so opening one or more windows upstairs on the sunny side, as well as a couple of windows downstairs on the shadow side, should create a draft that pulls colder air inside, and sends the hot air out upstairs. It of course only works if there is a significant difference in temperature, and will probably make your allergies go nuts. My 1970’s home in Denmark has a similar problem. Because it’s not that well insulated, LOTS of heat gets trapped inside during the day, which then gets absorbed by the bricks, and is then slowly released during the night, meaning it is VERY hot during the summer. We had a couple of Velux skylights installed, and during the summer I usually open them where they will work kinda like a chimney, pulling cooler air in from the ground level, and sending the hot air up through the skylights. Of course, when the summer gets unbearable i flee to my summerhouse which is made of wood, so it doesn’t retain heat like bricks, and also has a split system heat pump (air to air). As for your “slow heating system”, i think it’s more a question of using floor heating, which will usually take up to 24 hours to take effect. We have a Vaillant Air to Water heat pump with radiators, and the only “slow” thing about it is the somewhat lower water temperature compared to our old gas boiler.

I use space blankets on the outer side of the window to keep radiation away. Looks bad but its very effective

Your heat pump supports cooling aswell. I've got the same one. Just needs some additional sensors and it can cool the floors.

@bjornnyland

28 күн бұрын

Not possible.

@mahu142

28 күн бұрын

@@bjornnyland As I said, I've got the same one. Totally possible.

Ît's funny yout heat pump used more energy in every winter month than mine did in a whole year.

Why don't you install two air conditioners? One on the wall in the living room and the other on the first floor in the hall. This is an inexpensive solution.

@bjornnyland

27 күн бұрын

Money

How about tinting your windows? same idea we use on the cars. Also you can get privacy tint tint from outside looks like mirror.

Installing awnings is another solution. They're more effective than you think.

@bjornnyland

25 күн бұрын

Not pretty.

You can use window film which is a good solution when it comes to prize

There are these blinders like a role, with a reflective side and the other on any colour, easy to install, they just attach on the top of the windows with plastic holders, fairly cheap, but not suitable for that entrance...

There is window ceramic tinting that can block the infrared spectrum. You can still see through the windows, but nobody can look inside. Problem you have less heating effect in the winter time form the sun.

@bjornnyland

27 күн бұрын

The sun is not very strong during winter anyway.

@Noaixs

27 күн бұрын

@@bjornnyland good point and btw there are also clear tinting and there are not very expensive and you can do it by yourself.

As an Australian, I giggle when people say 28° is too hot. I'm pretty sure there's a better solution than $100K on screens. Is there possibly a solution that combines your curtains and blinds with temperature control. An example is like in an office building they will have double blinds. There's one blind that can be seen through and reflects heat an a second that completely blocks the light out.

@rtmpgt

18 күн бұрын

Zebra blinds are also great too. I got 'em on my house. They're blockout and sheer blinds that alternate in stripes.

The windows are probably made to keep heat indoors. So those aluminum shields that reflect the heat outward will trap the heat in the windows, and they may be harmed with that excessive heat.

Jula sells cheap window sealers for portable aircon, but if it's temporarily you probably don't need it. Are you gonna install a multi split heat pump? (main and second floor)

Sun blocking foils longest outside

When you open up doors or windows you disrupt the balanced ventilation system. It's better to run it at high speed without heat exchanger if it can pull in colder air from the backside of the house.

Here in Australia we usually get either ducted A/C throughout the house (for both cooling and heating) or what is most common is split system A/C on the wall. I'm guessing this would be more expensive to what you currently have? Or do they have issues with the very cold Winter temperatures you have there?

What about a roll of thermal tint intended for cars, cut it to size and put it on your windows. You should be able to do it yourself and save a fair bit of money. Edit: nvm just got to that part in the video lol.

Wall mounted external wall blinds/awnings - cheap if manually operated.

@jimjr9143

28 күн бұрын

Yep, that’s what i did . When you have that much surface windows they need to be covered from the outside to prevent the greenhouse effect . Outside shades did the trick . Seriously effective

@mdshovel

28 күн бұрын

@@jimjr9143 me too. they don't have to be fancy solar power run motors .. good old skool caveman operation

i looked at the current weather in the region. this house collecting heat like a champ.. at arround 21 degrees, 28degrees inside if the real summer comes it will boiling 😧

Hi Bjorn, your COP is very very bad. What do you have a heating source? If it's a heat pump you should have a minimum of 3.5 overall.

Check Llumar window film solutions

Mo Money, Mo Problems (and Less Money!) 😎

Yes, ZipScreens is the answer. I mean you did not put big windows on the house to block the view with stuff. Better of not putting windows on the house in the first place. I understand that you've got a temporary solution in place

why house dont have automatic ventilation ? like if a certain temp reach just run exhaust fan till it cools down and then it shuts off automatically

10.000 nok for persienn!! Maaan. You can by this in Ikea cheaper. Take a tripp to Sweden and chop. You can try to stop the ventilation system when its hot. If its 25gr outside you pull in 25gr. If its not set to night cooling, fix that to. Thanks for your video Björn.

@bjornnyland

29 күн бұрын

The IKEA doesn't fit. I have already checked out this.

If I had a house with too much heat with a pool like this, I’d research a heat pump that could pull the heat from the house to heat the pool. That pool is the way to get cooler temps in your home.

For my windows with direct sun, I use solar shades with 3% translucency. It blocks most of the sun, while allowing some light. I roll them up in evenings and back down on sunny days. And leave them down for a couple of rooms. Wow, 10,000 NOK for the each blind, or was that for the entire house? Ikea has some good blind options if you need inexpensive options. Be aware that some floors (especially wood) can become discolored unevenly when there is direct sunlight every day. I cannot tell what floor type you have.

@jimjr9143

28 күн бұрын

Outside shades is by far the way to go , it will work incredibly well . Mine where cheap as well . Paid $120 for 1 - 10ft x 8ft shade . Blocks 95% UV rays . My house cools down very easy now

@jli213

28 күн бұрын

Yes, that price is a much better value for purpose of blocking the sun.

im having Air to Air with heat pump installed so the work has heaters and air con

@ziggarillo

29 күн бұрын

Unfortunately he's gone for a heat pump connected to underfloor heating.

Firstly, the existing heat pump should support a heat exchanger installed in the inward flowing fresh air through the ventilation system. By doing that, you could send cooled air throughout the house. Secondly, outside screens are the only good solution if you want to utilize the sun for heating during the cold months. However, until you have the money, just buy cheap car tint solar film at the auto outlet and install it on the _*outside*_. It will help a lot. If it loosens, just glue it around the edges with transparent silicone sealant.

@bjornnyland

27 күн бұрын

It doesn't. I have already asked the installer.

@jsjs6751

27 күн бұрын

@@bjornnyland Did they give you a reason? And what exactly did you ask them?

@jsjs6751

27 күн бұрын

@@bjornnyland Did they give you a reason? And what exactly did you ask them?

Bjorn why do you need second heat pump for cooling. Doesn't the one you have, have an option to run it in reverse for cooling? Got a ground source heat pump in Estonia. Cooling first floor with in floor pipes and second floor with blower fan radiators... Would be the best and cheapest option if your heat pump has the option for it.

@bjornnyland

28 күн бұрын

No

use alumiumfolie

Bjorn ,you should install UV film on the windows.

@bjornnyland

28 күн бұрын

Do you mean IR?

@tiagocastro1392

28 күн бұрын

Plenty of solutions Llumar window film

@tiagocastro1392

28 күн бұрын

@@bjornnyland check Llumar film solutions. I am not able to send the link

I have used aluminium foil to - mostly - block out the light, but also keep out the heat. Glues it to a cardboard that fits in the window. Visually not looking good but practical.

Indoor zip-screen (persienner) is cheap for a temporary solution. Or curtains...It blocks the sun too, but might be not that effective as outdoors

Get some cheap vindusmarkise from Jula or Biltema

@bjornnyland

28 күн бұрын

Nope

Hi your house is Beautiful. In sweden Gothenburg temp is 27 this week. Too hot. How much cost your house?

Isabel is funny. Oh, shiiiiiit.

Vielleicht sollte er die oberen Fenster von aussen mit Wärmeschutzfolie bekleben...

Sorry to say that, but this house has some really bad design/architecture, concerning heat management. Especially for the price you payed. Passiv shade from outside by roof/overhangs or textile screen/raffstore are standard and should be planned from the start. 25C outside temperature is not even that warm outside temperature. What about summer? I hope you can get it fixed. In Germany there is Roma textile-screen or raffstore. Maybe an option for you as a retrofit.?

❤❤❤

You have swimming pool? Use that water to cool wentilation inlet.

@TechnoMonkeyFarm

28 күн бұрын

Heat the pool while cooling the house would be ideal but they would've needed to design that from the outset..

Ey, varför inte sk ”Svalbard-gardiner”. Dvs på utsidan applicera vanlig Alufolie med hjälp av diskmedel+vatten. Gjorde detta själv när jag bodde i Havøysund förra vintern..

Buy on credit

@bjornnyland

29 күн бұрын

Credit already maxxxed.

@runescapemasters123

29 күн бұрын

@@bjornnyland Average American credit maxxing enjoyer.

10 000 kr. for two blinds, what are they made of gold 😱

Hadde du ikke vært så plaget med allergi og pollen, så kunne du hatt et vindu åpent på skygge siden nede og et vindu åpent på varmside med en bordvifte ca blåsende utover ca 1,5 meter fra vinduet. Men du må nok bare smøre deg med tålmodighet fra til du får luft til luft AC. Heldigvis har dere ikke sol 24/7 som vi har🥵 av og til må vi sove i garasjen om sommeren🤣

Bjorn you need more kids 2-3 💜💜💜