Changing Ventilation for Improved Bathroom Temperature in a Newly Purchased Flat

Question

Hello. I bought a flat and there is a problem in the bathroom. If it's outside, I blow cold air in through the vents and the bathroom is terribly cold. What can be assumed or how to change this ventilation to make it good?

Piter3040 · Answer

This is because it is gravity ventilation. There is a pressure difference. If you have too little air in the apartment, it must be supplemented and the ventilation is blowing, not extracting. The only solution is to install air vents in the window. If your windows are too tight, the air can only go out of the apartment because it has to be supplemented somehow. (no air vents means moisture and fungus in the corners) Open the window and you will see that the draft will reverse immediately. . First of all, you need to ventilate the apartment well and unseal the windows. If you use, for example, a gas stove for heating with an open combustion chamber, this problem will often be even greater. And one more question, does the bathroom door have a large ventilation grille at the bottom?

Gizmoń · Answer

gravity? I see a fan there. If the wind forces the air back through this fan, then a ventilation check valve can be used.

ta_tar · Answer

If you already follow the advice # Peter3040 then if it is your fan, you can replace it with a bathroom fan with a backdraft lock. Edition: Someone beat me to typing.

Piter3040 · Answer

That is, I guess that it blows and there is a backflow as the fan does not work. Because it's not all the time, just sometimes, right? There is simply no intake

andrzej lukaszewicz · Answer

If the ventilation is not led to the roof, it will be. These ventilation outlets are placed on a large wall and simply the wind pressure from this side causes overpressure and blows into the bathroom room. The last strong winds were from the north, is that not the side (or NE or NW) you have that face on? Added after 2 [minutes]: If he does this, and does not improve the ventilation from the bathroom above the roof, it will be even colder in the bathroom and the rest of the rooms

triakw · Answer

I have led to the roof and the same thing happens. I have a high chimney.

Piter3040 · Answer

What nonsense are you talking about... In order for ventilation to work in every single apartment, there must be an inlet and exhaust. From a tightly closed room, air cannot only go out (exhaust) because it would run out There must be an intake. (the inlet is, for example, air vents in the upper part of the plastic windows, if it is not enough, the windows should be unsealed. There may be a small inlet near the floor, e.g. in the hall, not in the bathroom. The bathroom has a grille in the door by the floor and it will draw in. If the air goes back, it means that there is not enough air in the apartment.If you block the grille, you will soon get fungus in the corners near the ceiling.If the windows are very tightly closed and their upper air vents too, the fungus will grow quickly and dew will form on the windows at higher temperature differences . I will add that depending on the weather, different pressures are generated and sometimes it blows less and sometimes it will blow you very strongly. Open the windows for 3-4 minutes completely. (Leave the window vents fully open) Ventilate the apartment and only close the windows. The thrust should reverse for a while

Anonymous · Answer

A discussion of what to unseale and what to plug will not bring a solution. The reason is the extreme difficulty, or rather impossibility, of designing gravitational ventilation so that it works in the whole spectrum of weather conditions. Fluctuations in temperature, pressure, wind variables simply cannot be collected and dressed up in functions and patterns. 100 years ago, it was done based on the experience of builders, then designers' nomograms, and now on nothing - whoever wants to have overpressure here, and here underpressure, and here a larger wind, here a smaller one, and here not at all, let mechanical ventilation be designed. If I wanted a witty answer in the subject, I would write that since this grille is blowing cold, then maybe the bathroom can be turned into a pantry? Seriously, however: there is only one solution in this situation - the only one, which has already been given here twice, is to block the grille with a fan with shutters and a time sensor. Such a fan is controlled by the light switch in the room: you turn on the light in the bathroom, the fan starts and the shutter opens, closing the air duct in a de-energized state. When you leave, you turn off the light, which turns off the fan and closes the blinds after a preset time delay usually from tens of seconds to tens of minutes. Simple, cheap, effective, in addition, as I wrote - the only one. Regards

Piter3040 · Answer

Regardless of the temperature outside, hot or cold, regardless of the pressure, if circulation is ensured, it will work. How is it supposed to work if there is no intake? A windmill won't solve it. You are talking nonsense!!!! If you turn on, for example, a fan in the bathroom, then yes, the air will be drawn out, but ..... But if there is no intake, then, for example, in the kitchen there will be backflow from the ventilation. Without air vents, it works like this: in the kitchen, it pulls you out nicely and takes it from the bathroom because it has nowhere to go. The windmill will only reverse the thrust

Anonymous · Answer

How do you know there is no intake? Added after 2 [minutes]: The essence is not a fan, but a blind protecting against the influx of cold air. Added after 4 [minutes]: You have no reading comprehension. Four exclamation marks are a clear symptom of hyperactivity - consult with your parents.

jack63 · Answer

And here is an example of manipulation by the so-called mental shortcut. Blinds will help as much as ointment for rats... Friend @Piter3040 It translates well, but most people don't get it. The penalty for not understanding the simple rules of physics is a fungus and various strange, for the uninitiated, effects such as a cold breeze or pulling smoke from the fireplace or stench from the sewage system. For proper flow, the circuit must close. Both in electricity and ventilation. This does not change the fact that the solution shown in the photo is not a ventilation system. This is a mockery of the principles of creating ventilation systems. It is naive to count on the fact that forging a hole and adding a meter of pipe and a fan with immeasurable pressure will remove the used air from the bathroom. By the way, this design breaks the law. It is enough to read the regulation on the conditions for buildings in the ventilation chapter. You can learn a lot...

Piter3040 · Answer

As for the blinds, if we cover it, the cold will not fly in the bathroom. But somewhere it will have to fall and fill the gaps and the backflow will occur from another ventilation grille, whether in the room or in the kitchen Everything would have to be sealed tightly and it would be best to pickle in the stench and damp... I am a bit surprised that this ventilation in the form of these external pipes does not have a rotating tip forcing the draft (the flow is more stabilized). c

Anonymous · Answer

The penalty for not understanding an elementary question should be a lifetime ban on the electrode. If it's windy outside, I blow cold air in through the vents and it's terribly cold in the bathroom. Is col. 00 complains about fungus, drawing smoke from the fireplace or the smell of sewage? NO, I don't want cold air blowing into the bathroom. End and period. Simple? Besides, I think that it will be honest point by point, i.e. you will reliably tell the questioner what to do to stop the wind blowing in the bathroom, because so far your post does not show anything. Absolutely nothing.

Piter3040 · Answer

Well, we explain that if you cover this grille, moisture will arise, but the cold will not fly in the bathroom, and the apartment will complement the air from another ventilation grille.... It's a pity that the author of the topic does not respond. Because the question is whether there is no gas stove in the bathroom?

jack63 · Answer

You're manipulating again, and as you can see, you're one of those people who don't understand the rules of physics. What the author of the topic complains about at the moment is of little importance. This is just the tip of the iceberg. There will be other problems. This theme is due to a completely sick idea with pipes with a roof and wind inlets from the bottom. However, with air supply to the rooms and windless weather, it could work somehow. The whole construction looks like a drunken vision of some ventilation system. A simple hole with a labyrinth or ultimately a very light blind would be cheaper and better. The latter like to jam and their opening pressure can be compared to the fan's compression ...

Piter3040 · Answer

One more thing, what is the purpose of ventilation? So that there is fresh air in the house. And under this account it is created. In order for us to have clean and fresh air, it must be replaced, for example, we open the windows and ventilate. Below is a photo of proper ventilation

andrzej lukaszewicz · Answer

Of course, you're right, but as for the specific situation, if the rest of the rooms in this building were airtight, there wouldn't be air blowing into the bathroom, right? So the rest of the rooms probably have their own ventilation and INCORRECTLY placed vents from the bathroom on one of the walls cause blowing in cold air at an unfavorable wind direction (and without it too) and pulling it out in other rooms. If this fireplace outside the wall went above the top of the roof, only drawing (warmer) air from the room would work. This is why chimneys are provided with through outlets of ventilation ducts to make the ventilation operation independent of the direction of the wind.

Anonymous · Answer

Of course. It's understandable. Thus, I am withdrawing from the discussion. Regards

Piter3040 · Answer

Gravitational ventilation works on the principle of draft. If we open a window, for example, and in the other room there is also a draft. Air comes in through one window and out through the other. Gravitational ventilation works in the same way. Suppose we have 4 ventilation grilles. (i.e. 2 rooms, kitchen and bathroom) Everything is tightly closed. One of the grilles will start to make us an intake to create such a draft. View on the computer. For it to be properly cooled, air should enter at the bottom and exit at the top. The fan at the bottom blows in and the one at the top blows out. This is what an apartment looks like

jack63 · Answer

With no wind, yes. The wind, thanks to the dynamic pressure related to the speed, can cause an effect felt at the outlet grille. However, this effect has a small range. In order to avoid it, labyrinths in diffusers and appropriate chimney ends are used. What else are you writing about? People don't know the difference between wind and backwater. For them, it blows from the grille and that's it.

Gizmoń · Answer

Wow, what a discussion here. Let me ask out of pure curiosity - how do you guys see pulling such PVC over the entire facade up to the roof? It would look nice, especially in more than one building. Therefore, in Wrocław alone, a dozen or so housing estates should be closed, where almost every apartment has such pipes. I do not defend the idea, but I am surprised at the sight of it, which is quite common and not only in Poland (so not only Janusze are behind it).

Changing Ventilation for Improved Bathroom Temperature in a Newly Purchased Flat

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