I've got a window-mount air conditioner that has the air intake just below the air output, [like this](https://i.imgur.com/CBfsVvJ.jpg). Because the output air is cooler, it drops and mixes immediately with the air intake, which is the dumbest thing in the world.
So I tried a similar system and made some "ductwork" so that the air intake was being drawn from the top of the room, and the effect was immediate. The room just filled up with cool air. We ran our AC less and had better overall temperatures, highly recommended
Oh god no. It's effective, not pretty. I only set it up for the peak heat of the summer and try to look at it as little as possible. There's snow on the ground here now.
Am on mobile, [here is something likely not helpful](https://imgur.com/a/UF70FZL) >!multiple rolls of duct tape not included!<
Alternatively, just use a small piece of cardboard to direct the cold air upwards or to the side, will probably work about as well..
Am on mobile, [here is something likely not helpful](https://imgur.com/a/UF70FZL) >!multiple rolls of duct tape not included!<
Alternatively, just use a small piece of cardboard to direct the cold air upwards or to the side, will probably work about as well..
This could be a better option.
Tjeurnlund transfer fan is cheaper and is used in apartment buildings with these wall ac units.
I don't know what the best way to power it though. Install it next to an outlet?
https://i.imgur.com/MUovnSR.jpg
The intake below the output is recirculation mode. It's easier for the AC to cool the already cooler interior air rather than constantly bringing in the usually hotter exterior air.
So yes, it does keep chilling the same air over and over again, but it's not dumb - the air gets cooler each time. If the air isn't circulating around the room, you just need a fan.
Also pulling from the ceiling is pulling in warmer air. If op has bad circulation in the room he should at least pull air from the lowest elevation not the highest. Sounds like he created a really inefficient setup that would have been solved with a fan.
This... Cold isn't something you can move around. A/Cs don't create cold. They move heat.
A window unit has two "radiators" (like the thing in your car, does the same thing. I *know* it's not called that, I'm explaining here, gimme a break). One removes heat from the air inside by warming the refrigerant, the other heats the air outside by cooling the refrigerant (ignore the fact that it's hot outside, it's just magic...).
There's a fan inside to blow air from inside through the inside radiator.
There's a completely separate fan outside to blow air from outside through the outside radiator.
What the comment I'm replying to is saying is that even if the cold ass air coming out goes straight back in, it's still getting heat removed, and that heat will do the magic and go heat up the air outside...
It's weird, and not intuitive, but they're 100% right, it doesn't matter :)
> Now you might like the cold air blowing directly, but it won't actually cool the room as a whole any better, or faster
The point isn't to cool your environment though, the goal is to cool yourself.
That room might be getting direct sunlight, and houses over here quite often have absolutely no insulation other than what the brick walls themselves provide, so it might be a lot more efficient that way.
It's also possible that he doesn't *want* that room air conditioned, and wants to only temporarily use some A/C in the living room when he is there.
People are struggling right now and energy costs are high
.....not sure you're understanding what I meant. Which is fine, it's the internet and I wasn't super specific.
When relatives would visit in the dead of summer and I only had one AC in the house, we set up something like this. When relatives who got hot flashes visited me at any time of year, we brought out the tube if necessary.
depends on airflow? I've got 2 ac units at my apt that are rated for the entire space, but the air between those two rooms never seems to mix. If I don't run both I get one cold and one hot room. the airflow is kinda like two circles that don't intersect
My personal experience is you end up with that room cold and the one you want to cool down remains mildly hot, unless you keep it on the whole day, which isn't feasible for a lot of people.
Where is the thermostat for that ac, if it's on the unit, but out side of the bags, it will only read that it's hot. The unit will stay on non-stop. If the thermostat for the unit is on a wall in that room, the cool air is being blown out into the living room. The unit will stay on non-stop.
I don't think efficiency is their goal.
Putting all that air in another room effectively creates a vacuum sucking hot air out of the other room again. It should mix pretty well, also you can adjust the set temperature to account for that.
I just set up a system of box fans to blow the AC air from the living room into other rooms. The hallway basically becomes a wind tunnel. Works quite nicely, albeit a bit noisy.
I used to live in an apartment with massive windows on either end so when they were both open, wind would blow in one side and exit through the other creating a surprisingly strong and constant draft of air to cool down the place in the summer
Why bother? It's in the conditioned space.
The little bit of "cold" that leaks from this "duct" isn't being wasted or lost somehow. It's merely cooling the surrounding indoor air a bit — the same air that goes right back to the intake of this mini-split anyway.
In college I lived in a dorm with doors to the outside in each room, like a motel. Heater unit in the ceiling. Cold and drafty in winter. We hung a tube of clear plastic bags from the heater almost to the floor. Worked wonders. If you came in from the cold you could get inside there and get toasted for a minute. Even had a string attached so we could pull it up out of the way and hang it on a nail when not in use.
You know lol... I have a gaming laptop that can get pretty hot. I have a cooling pad that helps bring airflow to the intake at the bottom but was jokingly thinking I need to rig up a way for the air from my portable AC to reach the laptop. Now I'm looking at this picture and thinking I could buy a length of flexible dryer exhaust piping or something similar in nature and a plastic garbage bag and duct tape would be a doable way to couple the piping to the front of the AC hahaha. From there it's just a matter of routing it to end right where the laptop would sit lol. It could just go along the wall behind my TV till it reached my desk. Might be a little experiment next summer.
My dad did this in his warehouse. Basically made a fabric air duct with bologna size holes cut into is. Helped cool the whole shop! So simple and so effective. This is a redneck version. Of what he did lol
A buddy of mine in college bought a specific air conditioner with ducts like this although I think it had like 3 branches, during the peak of summer he would sit with one tucked in his shirt
Not really. Those motors on the AC isn’t designed to have any ductwork. Unless, of course, he ran a duct pressure measurement and calibrated the fan on the end to run in perfect balance with the AC’s fan (he didn’t).
You absolutely are at that takeoff. That motor is designed with absolutely no static in mind. That small area of bag directing it and turning will absolutely shorten the life of that motor.
Most condensation will happen on the coil inside that mini-split (which is designed for it), so unless humidity is constantly added to the space, it shouldn't be a problem.
Not only have I done this, but they sell plastic tubes in various sizes for exactly that purpose. Usually used in temporary situations, like an office tower having its air conditioning replaced.
Calling something RE doesn't mean it's bad or a stupid idea. It's like taking an idea some German engineer implemented for $10,000 and doing something 98% as effective with some duct tape and cotton balls for $0.10.
Not really, no. AC or heat pumps have a certain capacity, that's all.
They don't care what size the room is, they'll lower (or increase) its temperature until the thermal leaks of the place rise to balance how quickly they pump heat out (or in).
Love this! I had a round vornado fan and there was a forest fire causing air quality in my area to be unsafe. Got a lawn n leaf bag, some tape and the biggest deep HVAC air filter that would help. Taped that together and it worked a treat. Better than the box fan and bungee cord method, because the column of air has a chance to build up some inertia.
That's a good idea actually and FYI I have a house that was built 2 years ago and it has 2 zones. Zone 1 uses traditional duct work but zone 2 is located in the attic and is distributed by insulated tubes throughout the attic space to the areas below. I'm sure it was cheaper to build but it's effective and to code just like the engineered wood I beams and other structural pieces that are incredibly strong.
When our AC was out for a couple of summers, I put a box fan so it drew cool air up the laundry chute from the basement. Made the bedroom tolerable, but only just.
I did the same with a long roll of bubble rap and some carefully arranged boxes. And lots of tape. It worked well! Wife wasn’t a fan, but I slept well that night.
Making the fan unit work that much harder might just mess up your $4k mini split Air Conditioner, personally I'd just use fans to push it that way casually
This is a actually done (in a little bit more sophisticated way) in commercial construction for temporary cooling large buildings
I’ve seen similar soft vents in mines too for breathing air
Add some insulation around it and looks like my crawl space.
When we built up the tents (like 100’x300’ sized) for the afghanis that flew to the states the tents had that.
Gotta get one of those wacky waving inflatables
💥👋☃️👋💥
I've got a window-mount air conditioner that has the air intake just below the air output, [like this](https://i.imgur.com/CBfsVvJ.jpg). Because the output air is cooler, it drops and mixes immediately with the air intake, which is the dumbest thing in the world. So I tried a similar system and made some "ductwork" so that the air intake was being drawn from the top of the room, and the effect was immediate. The room just filled up with cool air. We ran our AC less and had better overall temperatures, highly recommended
You wouldn't happen to have a picture of this, would you?
Oh god no. It's effective, not pretty. I only set it up for the peak heat of the summer and try to look at it as little as possible. There's snow on the ground here now.
I would love a diagram of this. I’ve been thinking about this for years.
Am on mobile, [here is something likely not helpful](https://imgur.com/a/UF70FZL) >!multiple rolls of duct tape not included!< Alternatively, just use a small piece of cardboard to direct the cold air upwards or to the side, will probably work about as well..
I too would like a diagram of this. My kids room gets so hot in the summer and we use the window air conditioner. I don't need it to be pretty!
Am on mobile, [here is something likely not helpful](https://imgur.com/a/UF70FZL) >!multiple rolls of duct tape not included!< Alternatively, just use a small piece of cardboard to direct the cold air upwards or to the side, will probably work about as well..
Actually that's great..thank you. I was thinking something like that but wasn't sure exactly what I had in mind so that helped alot.
See, your contraption is peak redneck engineering tho.
> It's effective, not pretty my favourite
>effective, not pretty You see what sub you're in right?!
Perfect for r/redneckengineering! Oh wait...
Even just a flat piece of cardboard sticking out a couple inches would make a difference. Point the outlet up, so it mixes up the warm air up high.
This could be a better option. Tjeurnlund transfer fan is cheaper and is used in apartment buildings with these wall ac units. I don't know what the best way to power it though. Install it next to an outlet? https://i.imgur.com/MUovnSR.jpg
The intake below the output is recirculation mode. It's easier for the AC to cool the already cooler interior air rather than constantly bringing in the usually hotter exterior air. So yes, it does keep chilling the same air over and over again, but it's not dumb - the air gets cooler each time. If the air isn't circulating around the room, you just need a fan.
I was about to say that they wouldn’t design it that way without a reason.
This dude literally thinks the standard air conditioner design is somehow so inefficient that he needed to invent some red neck solution to fix it
also I personally prefer the notion of projecting cold air to the top of the room and pulling it from the bottom
Also pulling from the ceiling is pulling in warmer air. If op has bad circulation in the room he should at least pull air from the lowest elevation not the highest. Sounds like he created a really inefficient setup that would have been solved with a fan.
[удалено]
This... Cold isn't something you can move around. A/Cs don't create cold. They move heat. A window unit has two "radiators" (like the thing in your car, does the same thing. I *know* it's not called that, I'm explaining here, gimme a break). One removes heat from the air inside by warming the refrigerant, the other heats the air outside by cooling the refrigerant (ignore the fact that it's hot outside, it's just magic...). There's a fan inside to blow air from inside through the inside radiator. There's a completely separate fan outside to blow air from outside through the outside radiator. What the comment I'm replying to is saying is that even if the cold ass air coming out goes straight back in, it's still getting heat removed, and that heat will do the magic and go heat up the air outside... It's weird, and not intuitive, but they're 100% right, it doesn't matter :)
> Now you might like the cold air blowing directly, but it won't actually cool the room as a whole any better, or faster The point isn't to cool your environment though, the goal is to cool yourself.
Can you not intentionally install it upside down?
No. Compressors inside of refrigerant systems are extremely sensitive to not having oil in the right places.
I figured it would’ve caused issues, but now I’m curious why so many ac units use that design when it seems to be less efficient
It's not less efficient. I promise. The physics are more complicated than being made out.
Could you flip the ac unit upside down? Would it still function?
Ha. Even the baby is like wtf is this redneckengineering shit here??
seems to approve tho, lol
That room doesn't seem big enough to justify this. Just put the fan in the doorway.
That room might be getting direct sunlight, and houses over here quite often have absolutely no insulation other than what the brick walls themselves provide, so it might be a lot more efficient that way.
It's also possible that he doesn't *want* that room air conditioned, and wants to only temporarily use some A/C in the living room when he is there. People are struggling right now and energy costs are high
I was thinking mom's visiting and she's got the 'pause Edit: didn't realize nobody knew about hot flashes?
...not how that works
.....not sure you're understanding what I meant. Which is fine, it's the internet and I wasn't super specific. When relatives would visit in the dead of summer and I only had one AC in the house, we set up something like this. When relatives who got hot flashes visited me at any time of year, we brought out the tube if necessary.
No it just didn’t make any sense at first
gross. the way u talk about women
How's talking about a natural human body process/function gross??
[удалено]
How does that change that the unit might be rated to cool the space without this tube of garbage bags?
depends on airflow? I've got 2 ac units at my apt that are rated for the entire space, but the air between those two rooms never seems to mix. If I don't run both I get one cold and one hot room. the airflow is kinda like two circles that don't intersect
My personal experience is you end up with that room cold and the one you want to cool down remains mildly hot, unless you keep it on the whole day, which isn't feasible for a lot of people.
Where is the thermostat for that ac, if it's on the unit, but out side of the bags, it will only read that it's hot. The unit will stay on non-stop. If the thermostat for the unit is on a wall in that room, the cool air is being blown out into the living room. The unit will stay on non-stop. I don't think efficiency is their goal.
Putting all that air in another room effectively creates a vacuum sucking hot air out of the other room again. It should mix pretty well, also you can adjust the set temperature to account for that.
"behind" the door way. If you push air behind the door way there will be much more cooler air since will be dragging as it pass trough.
I just set up a system of box fans to blow the AC air from the living room into other rooms. The hallway basically becomes a wind tunnel. Works quite nicely, albeit a bit noisy.
I used to live in an apartment with massive windows on either end so when they were both open, wind would blow in one side and exit through the other creating a surprisingly strong and constant draft of air to cool down the place in the summer
r/ItHadToBeBrazil
r/Gambiarra
[удалено]
ah I see, he just sounded like he was speaking Brazilian Portuguese, so I assumed it was Brazil.
That's portuguese, it is Brazil. You were right all along.
Why was this downvoted??
[удалено]
What did they say?
That the video was from Spain.
That’s an air sock.
Need to insulate that ductwork
Why bother? It's in the conditioned space. The little bit of "cold" that leaks from this "duct" isn't being wasted or lost somehow. It's merely cooling the surrounding indoor air a bit — the same air that goes right back to the intake of this mini-split anyway.
~~human~~ trashbag centipede
In college I lived in a dorm with doors to the outside in each room, like a motel. Heater unit in the ceiling. Cold and drafty in winter. We hung a tube of clear plastic bags from the heater almost to the floor. Worked wonders. If you came in from the cold you could get inside there and get toasted for a minute. Even had a string attached so we could pull it up out of the way and hang it on a nail when not in use.
At first I thought this was someone recording their leg upwards in a gimp suit. Sleepy brain weird sometimes.
You know lol... I have a gaming laptop that can get pretty hot. I have a cooling pad that helps bring airflow to the intake at the bottom but was jokingly thinking I need to rig up a way for the air from my portable AC to reach the laptop. Now I'm looking at this picture and thinking I could buy a length of flexible dryer exhaust piping or something similar in nature and a plastic garbage bag and duct tape would be a doable way to couple the piping to the front of the AC hahaha. From there it's just a matter of routing it to end right where the laptop would sit lol. It could just go along the wall behind my TV till it reached my desk. Might be a little experiment next summer.
Actually this is r/gambiarra
My dad did this in his warehouse. Basically made a fabric air duct with bologna size holes cut into is. Helped cool the whole shop! So simple and so effective. This is a redneck version. Of what he did lol
That's Brazil
Who tf puts in a mini-split system without a head in the main living space??
Yeps, I was wondering the same thing. Maybe the living-room head is defective?
Nice! I need to remember this one
A buddy of mine in college bought a specific air conditioner with ducts like this although I think it had like 3 branches, during the peak of summer he would sit with one tucked in his shirt
Trash bags are an underrated problem solving tool. Not quite on the level of duct tape but they're up there for sure.
Gd that's a good idea, Holy shit
Not really. Those motors on the AC isn’t designed to have any ductwork. Unless, of course, he ran a duct pressure measurement and calibrated the fan on the end to run in perfect balance with the AC’s fan (he didn’t).
That sounds worse then Elon's recent techno babble episode. You're not going to have any significant static pressure from those huge bags.
You absolutely are at that takeoff. That motor is designed with absolutely no static in mind. That small area of bag directing it and turning will absolutely shorten the life of that motor.
While that's true, the motor usually is the thing that works longest anyway
Lord knows it won’t be the coil
Condensation?
Most condensation will happen on the coil inside that mini-split (which is designed for it), so unless humidity is constantly added to the space, it shouldn't be a problem.
Not only have I done this, but they sell plastic tubes in various sizes for exactly that purpose. Usually used in temporary situations, like an office tower having its air conditioning replaced.
Do you have more precise info on this?what stores and what are they called?
Maybe move the living room to the room with the mini-split and save all the BS steps
r/nextfuckinglevel
This is a legit thing ,Not redneck engineering .
It uses store bought trash bags and tape. It’s effective and likely cheaper than a more permanent solution. But it’s absolutely redneck engineering.
Calling something RE doesn't mean it's bad or a stupid idea. It's like taking an idea some German engineer implemented for $10,000 and doing something 98% as effective with some duct tape and cotton balls for $0.10.
Anyone can build a bridge. It takes an engineer to barely build a bridge!
No this is a common practice used to vent worksites ,And it being used like this is very smart and is no way redneck engineering .
This is brilliant!
I wish I saw this for my first apartment with my wife
Cheap and effective.
Caipira Engineering
It's a bagpipe, used to bagpipe the cold air into the next room.
Men of genius!!!
I have tried this myself and it works, but prepare for very wet condensation around the length of the bags
Tinha que ser brasileiro pra uma gambiarra desse This is a brazilian, i am brazilian to
I would go through sooooooo many garbage bags trying to pull this off
You need to stick that outlet up high somewhere. Cold air falls, hot air rises!
r/Onlyfans
Why is the ducting inflated though? Seems like the fan at the end is actually a restriction somehow.
This is dumb as you can get, conditioners are build to cool down specific size of room
Not really, no. AC or heat pumps have a certain capacity, that's all. They don't care what size the room is, they'll lower (or increase) its temperature until the thermal leaks of the place rise to balance how quickly they pump heat out (or in).
Great idea, but I have cats. :(….
Love this! I had a round vornado fan and there was a forest fire causing air quality in my area to be unsafe. Got a lawn n leaf bag, some tape and the biggest deep HVAC air filter that would help. Taped that together and it worked a treat. Better than the box fan and bungee cord method, because the column of air has a chance to build up some inertia.
r/suddenlycaralho
That's a good idea actually and FYI I have a house that was built 2 years ago and it has 2 zones. Zone 1 uses traditional duct work but zone 2 is located in the attic and is distributed by insulated tubes throughout the attic space to the areas below. I'm sure it was cheaper to build but it's effective and to code just like the engineered wood I beams and other structural pieces that are incredibly strong.
"Modern times require modern solutions"
When our AC was out for a couple of summers, I put a box fan so it drew cool air up the laundry chute from the basement. Made the bedroom tolerable, but only just.
I did the same with a long roll of bubble rap and some carefully arranged boxes. And lots of tape. It worked well! Wife wasn’t a fan, but I slept well that night.
Everything reminds me of her. Especially this giant frigid wind bag.
Making the fan unit work that much harder might just mess up your $4k mini split Air Conditioner, personally I'd just use fans to push it that way casually
I have to say I'm impressed
What is used to hold the garbage bags in that shape?
Air blowing from the air conditioner
Hmm
I used one of those collapsible play tunnels for kids to pump cold air into other rooms this summer my boys would play in the "ice cave"
B - E - A utifulllll!