Ventilation Rates and Energy Efficiency of Various Window Types

[@WhoCaresReally2023]

This is obviously for advertising purposes only. I may not have the technical presentation as they've shown here, but my common sense tells me that out-swinging casement window is better and more versatile. In Louver windows, if the air flow is in the front of your house, then, the window on the left and right of your house is not effective. While if you open the out-swinging casement window on the left and right of your house on a certain angle, then, it would probably be more efficient. That's just my common sense though.

[@BreezwayLouvreWindow]

Hi Matt [Full disclosure: I scripted this video and authored the report on which it is based] When I was young I had casement windows in my bedroom with 2 opening sashes. One sash opened to the right and the other sash opened to the left. If the wind was blowing directly at the wall then air would come through both sashes. If wind was blowing from the left, then the sash that opened to the right funneled the wind into my room, as you describe. But the sash that opened to the left blocked wind that was blowing from the left, so air only entered through one of the window openings. I have seen casement windows where all of the sashes open in the same direction in an attempt to maximise the ventilation when the wind blows from a particular direction, but in most locations, the wind doesn't ONLY blow in one direction, so sometimes those casement windows would maximise ventilation, but at other times they would actually prevent ventilation. The other thing to consider is the flow of ventilation through the house. Wind will force air into the house through windows and doors on the windward side of the house, and suck air out of the house through windows and doors on the leeward side of the house. These pressures on the windward and leeward sides of the house will force air to either enter or exit the house through the side windows, regardless of the window type. Whether the air enters of exits through the side windows would depend on the relative sizes of the various openings, the external shape of the building and the internal layout of the house. If you're interested in more details of the study, a Technical Bulletin describing the methodology and logic is available here www.breezway.com.au/downloads/TB_Ventilation_Openings.pdf If you're interested in more details about the energy efficiency of our louvres, I'd recommend this page www.breezway.com.au/window-energy-efficiency/

[@onetwothree4148]

Casement windows are much more energy efficient when closed. In the real world you want as few a number of pieces of glass as you can get. More glass panes means more places for weatherstripping and air seals to fail in the long run. Show me a study comparing energy efficiency of any of these windows and louvers 10 years later. It only takes one air leak to massively reduce the inefficiency of a window.

[@mohd5rose]

@@onetwothree4148 Indeed. While the "altair or altair like" windows whenever you shut it, there is always a gap between the glass hence reducing the efficiency of air-conditioning.

[@BreezwayLouvreWindow]

@@onetwothree4148 Breezway Altair Louvres do not have seals between the individual glass blades. The flatness of the glass and the locking pressure provides a good seal. They have passed testing to 40,000 open/close cycles (50 years of opening and closing the windows twice daily) before losing locking pressure and therefore sealing.

[@BreezwayLouvreWindow]

@@mohd5rose Older style louvre windows did not seal well, but Altair Louvre Windows have a number of patented design features that result in excellent sealing. They easily exceed the air leakage requirements of the relevant Australian Standards.

[@sanace2788]

Louvre style is very great for airflow, but it's pain in the ass to cleaning it from the dust...

[@frankriganya1069]

you van use brower to clean

[@BreezwayLouvreWindow]

On the positive side, louvre windows are one of the few window types where you can easily clean both the outside and the inside of the window from the inside of the building. This is particularly beneficial for windows above the ground floor. For more information: www.breezway.com.au/cleaning-louvre-windows-made-easy/#more-17657

[@tomjones6296]

Breezway Louvre Windows .but don't do well in cold weather.

[@brotheradam]

Biggest problem is the bug screens availability for the louvre... I prefer them and wish breezeway Altair was available here in Jamaica

[@karlcorrz]

In PH we call louvre "jalousie window"

[@cpyandy]

It is true that Louvre window does allow more airflow into the building, however it reduces thermo-insulation of the house too. For a truly comfortable and energy efficient home, insulation is more important than airflow rate.

[@subStuff]

Spot on. Louvre windows are good when temp doesn't vary too much year round... In Southern Nigeria, they were great... At the Himalayan foothills, they would be a disaster.

[@BreezwayLouvreWindow]

Using modern technology like low emissivity coatings on 6mm thick glass, Breezway Altair Louvre Windows have similar thermal insulation properties to double glazed windows. The energy ratings are publicly available on the Window Energy Rating Scheme website www.wers.net

[@BreezwayLouvreWindow]

@@subStuff They are definitely better suited to climates that are temperate for portions of the year. In extremely cold climates, ventilation is only required for indoor air quality, not for cooling, and therefore windows with smaller ventilation openings are sufficient. In extremely hot climates, even massive amounts of ventilation might not provide sufficient cooling.

[@richardprice5978]

@@BreezwayLouvreWindow are theses available in the usa 🇺🇸? and approve for SLC Utah arenas? and in a connect 2 car shop/garage? as a back window opposite of the main automotive automatic door opener and door ? and or simi temperature controlled? 6X6 feet sizing ish. I like the idea as it looks invisible 2ft away vs my slider window that is there from the 1970's/horrible at keeping in heat and is wore out thin aluminium frame single uninsulated plane ect.

[@BreezwayLouvreWindow]

@@richardprice5978 Yes, our louvres are available in the US, and are tested to AAMA Standards. For pricing and supply you would need to speak to our North American Branch. They are contactable on their website here - breezway.com/contact/

[@davidcendana2302]

God bless the recommendation algorithm

[@shahnasramli]

the weakest point of this window is how easy thief can coming in by removing piece by piece. My old house has broke by the thieves 3 times in the same years

[@BreezwayLouvreWindow]

Security is definitely a concern with older style louvre windows, but modern Altair Louvre Windows are far more secure due to the tight locking pressure when they are closed. Keylocks, security bar systems and security screens can all be used for additional peace of mind.

[@sunilhpunjabi2847]

Swing Grill Bordered Louvers with Sandwiched Glass makes Stronger Secured Louvre Window

[@karlcorrz]

Window grills my man

[@iqbalfadillah124]

In Indonesia we use this type of window many years before. And to maximize the security we add steel rod to each louvre

[@imrie2591]

That’s why in philippines every windows has grills on it...

[@user-go5qe4nf5s]

In Indonesia the Window Name is Nako..

[@natra0512]

Malaysia too dude.. cermin nako

[@bobjkr9870]

Biasanya rumah Jadul2 banyak yg jendelannya kek gini ya? Rumah2 yg dibangun sekarang jarang keknya yg jendelanya kek gini

[@augy183]

Susah dibersihkan. Sela2 jendela cenderung berkarat seiring waktu.

[@akurdriftk]

ketawa saya mas.. kaya beginian diiklanin dan ditonjol2kan. Di Indonesia sudah ada bertahun2

[@antonioc9396]

In the Philippines we call it jalousie.

[@mscuthbert]

Having just moved from a home with casement windows to louvre (jalousie) windows, you've left off the biggest advantage of jalousies over casement: by not opening out with a big edges, louvres don't allow birds to sit on their wide/protected spaces while you get the airflow overnight and poop all over the windows. If they face outwards, you're lucky because you can clean it from the inside; but woe be to you when they deface the outside of a casement. (Also easier to add an internal AC to a louvre/jalousie by removing a few panes and still get airflow at night compared to a casement)

[@HiroshimaMS]

I did not know this type of windows, when it is closed it is airtight? and it opens/closes everything at the same time or can we leave some tabs opened/closed?

[@BreezwayLouvreWindow]

Breezway Altair Louvre Windows provide tight sealing significantly better than the standard required for residential windows due to the living hinge design that prevents water and air penetration, and an over-centre locking mechanism that provides strong closure. You can also customise your louvre windows so that some blades can open while others remain closed, and you can angle these blades to help control the amount of ventilation you require.

[@nurchen6611]

Isn't this an old type window that's usually fixed on old houses. My 40 year old house is using it and it is painful to clean as they collect dust.

[@BreezwayLouvreWindow]

Louvre windows have been popular since the 1950's because they maximise natural, cooling ventilation, so it's not surprising that they are often seen in old houses. These days they are very popular with many award-winning architects and building designers. Visit the Project Profiles page on our website for some examples. www.breezway.com.au/inspiration/projectprofiles/#

[@jamescatlover123]

Putting indoor plants can help to cool the house too like snake plant.

[@LargestClassifieds]

It can be a pain to clean the panes, nevertheless, the opening space is obviously bigger than other designs, thus allowing better ventilation.

[@BreezwayLouvreWindow]

Yes this is true, they can be a bit fiddly to clean, however the beauty of the louvre window is that both sides of the glass can be cleaned from inside the building which is a huge advantage in multi-storey buildings.

[@arkshisha]

How about casement windows with sashes opening to the inside of the room? They should be more efficient, safe and convenient.

[@BreezwayLouvreWindow]

Casement windows with sashes opening to the inside of the room would give very good ventilation if the sashes opened perpendicularly to the wall. They might not be very safe to people walking around inside the room though as they would project quite far into the room.

[@thecuticles]

Are these windows in Ghana?

[@Rudy4759]

Very efficient to let air in. However when you turn the ac on, the cold air leaks out through in between the slats making it very inefficient.

[@BreezwayLouvreWindow]

Modern louvre windows like the Breezway Altair Louvre Window have air infiltration rates that exceed the Australian Standards. They therefore do allow airconditioning to run efficiently. In addition, because they maximise cooling natural ventilation, airconditioning will not be required as frequently - the best way to save electricity is to not use any at all!

[@rajasingammuthusamy7171]

The coconut and jute fiber another substitute for asbestos for roof tiles and brick making. Give it a thought in your R & D project.

[@MemeBiologist]

Do you have any roll up windows?

[@haemiclist3503]

best way is a suction inside your house. sucks air then going out. In that way fresh air will sucks from ouside as well.. .No matter how big is your window if the air pressure inside is the same as outside then air will not flow in

[@krishona2735]

This is rocket science at its best!

[@nobodynobody1235]

How about winter time?

[@BreezwayLouvreWindow]

Breezway Altair Louvre Windows are high performance, energy efficient windows. They are better suited to climates that are temperate for portions of the year. However, in extremely cold climates, ventilation is only required for indoor air quality, not for cooling, and therefore windows with smaller ventilation openings are sufficient. Using modern technology like low emissivity coatings on 6mm thick glass, Breezway Altair Louvre Windows have similar thermal insulation properties to double glazed windows. The energy ratings are publicly available on the Window Energy Rating Scheme website www.wers.net

[@aleciatang473]

I should change my windows with this... great job!!

[@helmifirdaus7213]

How about upside down awning window?

[@BreezwayLouvreWindow]

If the awning window opens to the same angle, the ventilation opening will be the same whether the window opens at the bottom or the top.

[@明-j6y]

只有 英文讲解、投诉你们。

[@rahulraju7]

The concept works only if the air flow is again the window , Casement window makes 3 direction air flow inside.

[@BreezwayLouvreWindow]

Hi Rahul Raju, if you are referring to casement windows where the sashes open to the inside of the window, then yes these types of windows, like louvre windows, allow ventilation through virtually the entire window area and deliver very good ventilation. However the operable sashes of these casement windows may project beyond the inside wall which could be considered a dangerous obstruction for passing traffic, unless the sashes open perpendicular to the wall in which the window is installed. Also, in situations where fall prevention requirements need to be met, this type of casement window would not be deemed to satisfy. This is in comparison to Breezway Louvres with the Stronghold System that can comply with fall prevention standards while offering maximum airflow through the restricted window opening to provide a good level of ventilation.

[@hadifirmansyah9709]

Same with my parent house windows.. A 40 years old house 😅

[@BreezwayLouvreWindow]

Louvre windows have been popular since the 1950's because they maximise natural, cooling ventilation, so it's not surprising that they are often seen in old houses. These days they are very popular with many award-winning architects and building designers. Visit the Project Profiles page on our website for some examples. www.breezway.com.au/inspiration/projectprofiles/#

[@luisitoronquillo2037]

@@BreezwayLouvreWindow why is breezway louvre windows are not available in the philippines

[@colinclingan8246]

What about hopper?

[@BreezwayLouvreWindow]

This study was conducted on window types commonly used in Australia, where hopper windows are not very common. If a hopper window opens to a similar angle as an awning window, then the ventilation opening would be almost identical.

[@TomaszKrawczyk-AwAdOn]

Nice solution during winter. On Hawaii.

[@DuluthHap]

Right on~ nice windows ,mate 😎

[@BreezwayLouvreWindow]

Thanks! They're very popular with many award-winning architects and building designers. Visit the Project Profiles page on our website for some examples. www.breezway.com.au/inspiration/projectprofiles/#

[@sebastjansslavitis3898]

it doesn't matter what percentage of window you can open, but how much airflow you need Awning window with its 18% have enough air flow for one normal sized room - at least if you don't live in Australia

[@BreezwayLouvreWindow]

Large ventilation openings are less important in cooler weather, but there are very few places that never get hot and therefore would never benefit from larger openings to provide cooling natural ventilation. A quick Google search will reveal that many major European cities (eg Moscow, London, Stockholm, Munich) have experienced temperatures above 30C in recent years.

[@paradisephotographyTCI]

I live in the Turks and Caicos where Hurricane Irma's winds maxed out at 300 KMH or 185 MPH with gusts over 200 MPH. I know the security screens can help prevent flying debris from cracking the glass, but can the glass be delivered impact rated?

[@BreezwayLouvreWindow]

@@paradisephotographyTCI We recommend toughened (also known as tempered) glass which is more than 5 times stronger than regular glass. You might be interested to hear how Altair Louvres performed during Cyclone Yasi in Queensland, Australia kzbin.info/www/bejne/p4ianKqPnbZgmNk

[@colinclingan8246]

Awnings can be open during rain thou

[@BreezwayLouvreWindow]

Awnings can be open in the rain because the sash (the part of the window that moves) is angled downwards to the outside of the building, so any raindrops that fall onto the glass will roll off to the outside. The same is true for a louvre window, the blades are angled downwards to the outside of the building, even when the window is fully open, and so any raindrops that fall onto the glass blades will roll off to the outside.

[@sunitadwarka347]

Respected sir. The last modle which give facilities of 80 percent ventilation can be decorated by cutting edge od glass in semi circular pattern. Nice beautiful pattern will make it more beautiful. you can use brown glass for sunny country and can add net for mosquito. I have liked your fourth modle but it should be more artistic to raise the value of home. Namh shivay.

[@redviperbear]

aside from security these windows do not keep sound out at all

[@BreezwayLouvreWindow]

The relatively thick glass and good sealing of the Altair Louvre window system provides an effective noise insulation barrier. Testing shows that Altair Louvre Windows can achieve Rw ratings of 27-28 when toughened glass blades are installed. This is comparable to the acoustic properties of some double glazed windows.When using the Altair Dualair Secondary Glazed Louvre System, a Rw rating of 38 can be achieved with toughened glass blades.

[@قناةأصواتالطبيعة-س8ز]

Casement window should be 60% ventilation area instead of 40%, its a stupid error if it is.

[@gamerjax482]

Definitely would not pass the pressure, water, and air tests where I come from! Inswing or outswing Casements are your best option.

[@BreezwayLouvreWindow]

Breezway Altair Louvre Windows are high performance windows that are even able to exceed the wind pressure, water penetration resistance and air infiltration requirements of cyclonic regions. They are extensively tested in testing laboratories and their performance in real world conditions has been proven. Testimonies of homeowners who experienced Cyclone Yasi are available here: kzbin.info/www/bejne/p4ianKqPnbZgmNk

[@jaessens]

Hello, nangendi ae koen...? Kawet jaman para wali Indonesia wes nerapno jendelo krepyak jenenge.

[@azkia_sarah]

Sing koco Yo sek jamane omah Jeh Podo gedhek

[@khazaharto515]

Ngakak

[@digitaldream9yearslater743]

ing sana mangun karso

[@fajarkurniawan6551]

Ning zaman semono, munculah abdi keraton sing podo joyone

[@yadhikafajar4270]

Kaca nako = Rp 5.000/ lembar kaca In English Louver windows = Rp 1.000.000/ lembar kaca 😪

[@FrizTrooperz]

Bener bro. Mahal amat yak padahal disini udah jarang yg make 😂😂

[@rachmankunaifihendy2291]

susah dibersihin takut kena tangan ato pecah. blm lagi kalo udah mulai macet, bikin emosi.

[@bayuardiantoid]

Gampang kemalingan 😂

[@rafiy7150]

hahahha

[@rafiy7150]

@@bayuardiantoid bisa pasang teralis kan Bang?

[@zongzonj8506]

thanks kerp it up. what about to keep home cool by what type of ventilation system. cheap one

[@kaushikdas24x7]

Indian 🇮🇳 window is perfect

[@sanamdutta3703]

In India, We use that 78% one in our Houses 🏘️

[@dontaskwhatmyname9002]

At my hometown we call it air conditioner

[@zmzmetal721]

It takes time & a hard work to clean the windows 1 by 1, piece by piece... feuhhh...

[@BreezwayLouvreWindow]

On the positive side, louvre windows are one of the few window types where you can easily clean both the outside and the inside of the window from the inside of the building. This is particularly beneficial for windows above the ground floor. For more information: www.breezway.com.au/cleaning-louvre-windows-made-easy/#more-17657

[@old_H]

Louvre type is a pain to clean.

[@BreezwayLouvreWindow]

They are more difficult to clean than other window types, but on the positive side, louvres are the only window type where both the outside and the inside of the window can easily be cleaned from inside the building. If you have any windows above ground level this is a huge benefit.

[@chadpalomino7950]

@@BreezwayLouvreWindow Only.....What about European style tilt and turn windows??? Much more energy efficient in summer and winter than louvre windows and can be cleaned from the inside. So overall a better option.

[@BreezwayLouvreWindow]

@@chadpalomino7950 My apologies, you are right - the outside of European style tilt and turn windows can also be cleaned from the inside of the building. They wouldn't allow as much ventilation as louvre windows though.

[@chadpalomino7950]

@@BreezwayLouvreWindow There is no better ventilation than a fully opened tilt & turn (casement) window as there is no obstruction of air flow into the room. When the outside temperature is too hot or cold, you can close the double/triple glazed sash, which has multiple seals and locking points. Totally superior product in every way.

[@BreezwayLouvreWindow]

@@chadpalomino7950 maybe superior when the outside temperature is extremely cold for large portions of the year, but a fully opened tilt & turn window would need to open with the sash perpendicular to the wall to match the ventilation opening of a louvre window - in this case the sash would project far into the room, presenting an obstruction at best, or a hazard at worst, to those moving around inside the room. As with many things in life, there are often multiple solutions, each with unique benefits which must be weighed up against each other. In some circumstances a tilt & turn window might be superior, in other circumstances a louvre window would be the better option.

[@sum321rediff]

Obvious information which everyone can understand seeing the window. I was expecting some more information in this vdo.

[@urabusliberty9258]

I just dont like how louvres look

[@muhamad3657]

Naco jugak terbaik walaupun nampak tak berapa moden

[@tera589]

only problem i see is the obvious how to easily clean all the different windows?

[@BreezwayLouvreWindow]

On the positive side, louvre windows are one of the few window types where you can easily clean both the outside and the inside of the window from the inside of the building. This is particularly beneficial for windows above the ground floor. For more information: www.breezway.com.au/cleaning-louvre-windows-made-easy/#more-17657

[@pwian01835]

Please explain in detail

[@BreezwayLouvreWindow]

Hi, more detail of the study is available in this Technical Bulletin describing the methodology and logic www.breezway.com.au/downloads/TB_Ventilation_Openings.pdf

[@Avalance0317]

Oh wow, KZbin advertisement these days are that long?

[@frankriganya1069]

mingoni mwetu africa nyumba na ofisi zetu hazina madirisha ya kupitishia hewa safi huwa inaishia 13%

[@aimanadzhan5135]

Louvre style is not suitable if you put aircond

[@BreezwayLouvreWindow]

Modern louvre windows like the Breezway Altair Louvre Window have air infiltration rates that exceed the Australian Standards. They therefore do allow airconditioning to run efficiently. In addition, because they maximise cooling natural ventilation, airconditioning will not be required as frequently - the best way to save electricity is to not use any at all!

[@doneldTrumpet]

How about no windows and wall??... 10000% efficiency...

[@ryaneeswaran750]

and for a great price free

[@vilmaguer]

yes for burglars

[@purpleanchor9397]

This is true but the maintenance aspect has not been mentioned. From experience the louvre type is cumbersome to clean

[@BreezwayLouvreWindow]

On the positive side, louvre windows are one of the few window types where you can easily clean both the outside and the inside of the window from the inside of the building. This is particularly beneficial for windows above the ground floor. For more information: www.breezway.com.au/cleaning-louvre-windows-made-easy/#more-17657

[@briwicklab]

it was great in the 90's i was using them. but, it has too many moving parts on a single window. it gave a lot of ventilation though

[@MrLeslielye]

Looks like my school window

[@BreezwayLouvreWindow]

Louvre windows have been very popular in schools for many years. They maximise natural, cooling ventilation and improve the indoor air quality which improves learning and health. For more information and some examples of recent schools using our Altair Louvre Windows, visit: www.breezway.com.au/video-stories/education-buildings-with-breezway-louvre-windows/

[@sliverbullet9067]

main problem is dust with air

[@rusMusDie]

I can only imagine these in winter

[@Olebrucanism]

It's the kind of window every house has here in Puerto Rico.

[@KT3Hchannels]

Rất hay, hữu ích

[@rhommhan]

It looks old fashioned

[@BreezwayLouvreWindow]

They're very popular with many award-winning architects and building designers. Visit the Project Profiles page on our website for some examples. www.breezway.com.au/inspiration/projectprofiles/#

[@jesus2621]

dude clenaing the windows you recomend is a pain in the ass you have to remove each of the glasses to reach the dirt and then put it again hoping not to cut your hand or drop any windows sheet in the process

[@sergiua7943]

So, best window is no window for 100%.

[@electricsavinghomeel]

great job for this video, thank you for sharing..

[@Fruitarian.]

These days barricading windows from burglar is way more efficient, also goodluck cleaning that louvre😅

[@Fruitarian.]

casement window is the best, also easy to clean

[@tharindaprasad6278]

👍👍👍

[@onggao666]

Old tech new price.

[@creativereflux4336]

Ang dami niyong research, di na lang kayo nagtanong sa Pinoy.

[@johannessomera5672]

advertising ginawa nila dito, not really a research vid

[@zulfikarzulkarnaenalhaq3594]

Another ads for windows

[@imtiazkanaKLM724]

And live-in Amazon 🦂🕷️🐝🦗🐜I need net 🕸️

[@civilwar6506]

NAKO

[@stubbyboardman701]

Why the hell is this in my recommendation and why am I watching it

[@theimpaler5034]

Just keep all your doors and windows open and the draft will create the airflow while you are at home this is all marketing bullshit

[@BreezwayLouvreWindow]

The size of the ventilation openings will definitely make a difference. Larger ventilation openings will result in more airflow which will provide more cooling. If this were not true, a single small opening at each end would be enough to keep a large hall comfortably cool.

[@NaturesInfiniteWELLth-fo6rs]

Not buying it.

[@titan_pitirri3844]

Y la calor te la guardas en los bolsillos ? Valla mierda de producto

[@TCBumby]

0:55 no shit Sherlock.

[@akimbo5283]

Ah yes, the ugliest and dustiest window

[@LArKuLe]

บานเกล็ด

[@markc3206]

And ofcourse it's the ugliest one out of all of them

[@BreezwayLouvreWindow]

Breezway Louvre Windows are very popular with many award-winning architects and building designers. Visit the Project Profiles page on our website for some examples. www.breezway.com.au/inspiration/projectprofiles/

[@JuicerNation]

lol these are the ugliest windows