Chimney ventilation, draft in the house from the 60's, improvement of the mo

Hello,
I am struggling with problems with the operation of my chimneys and, wondering what I can do to improve their operation, I am considering several solutions. I would be grateful for your help in understanding the problem and making changes.

The case concerns a single-family house from the 1960s with 2 chimneys made of clinker brick, but only those parts extending beyond the roof, the rest from the 1960s.

The problem that arises is, unfortunately, but I regularly notice the lack of draft with the effect of drawing (withdrawing) air into the house. And while this is the case in ventilation barrels, unfortunately for some reason I notice the same phenomenon in the exhaust barrel of a gas furnace where the acid-resistant pipe runs from the furnace to the chimney outlet - it is difficult for me to understand.

Current solutions in chimneys:

Chimney No. 1 - 3 barrels, extreme ventilation (basement and kitchen), middle gas furnace, whole barrel filled with acid-proof pipe.
All barrels are exposed at the top, flush with the concrete cap (except for the middle one from which Kwasówka protrudes from the furnace). Additionally, the extreme ventilation barrels have a side grille, but only on one side of the funnel (or should they be on two sides?).

Photos:



Chimney No. 2 - 3 barrels, all ventilating (room, basement, bathroom). It is true that in this chimney the outer barrels are closed from the top (the cap has no holes), but they have side grates, only one of them has side grates on both sides (bathroom), the one with one grille is a barrel from the room that draws air regularly .

Photos:



My observations:

1. Each of the chimneys has one barrel, the grilles of which are in the basement, in one room, that is, they connect through the room. I don't know if it matters.
2. In the same room in the basement where the barrels connect, there is an additional hole in the side wall (intended in the past to ventilate or oxygenate as there was a coal stove). I don't know if this side opening matters.
3. The rest of the barrels are not connected to anything else, they just go up from the floor and there are grills under the ceiling of the room.


My suggestions for improving the work of the whole:

1. Make 2 new concrete caps for the chimneys (each with 3 round holes) and insert the chimney caps supporting the chimney draft into the holes (with a piece of pipe inserted into the holes - no pipe in the entire barrel).
2. And the question is whether all side grates should be bricked up in this case? Leaving them off my solution makes no sense.
3. Give up my suggestion and leave the barrels open at the top and make grates on both sides of the chimney for each ventilation barrel?
4. Give up my suggestion and make a full cap (close the top outlets) and leave only the side ones, but as above with the grate on both sides of the chimney?


Examples of attachments, possibly which is better, which one should I choose in my case?




Thanks for all the tips and tricks.

In my opinion, the grilles on the chimney should be on both sides, of course, the chimney should be closed at the top. In stronger winds, air is not blown into the chimney, but the air flows outside through the second grate. Ventilation problems are often caused by windows that are too tight.

Thank you for your answer.
Indeed, the grilles on both sides should definitely be.
The fact that they are not there seems to be a mistake of the chimney maker. It is also difficult to understand why there is one side grille and the top of the chimney exposed.
Therefore, in order to sort it out, I created this topic.
The indicated solution is one of those I have given - the question what about the others?
When it comes to the tightness of windows, unfortunately mine are not tight, they need to be replaced and sometimes you can hear the air rustling through them

All ventilation ducts should be led not from the top, but from the sides to both sides.
As for the cap for the exhaust pipe, it is better to have a chimney sweep or a gas worker.

House from the sixties, but probably now "after renovation" the layout and purpose of the rooms has changed? It would be advisable to analyze how the ventilation is supposed to work now, i.e. which rooms are to be supplied and from which air is to be exhausted, so that it does not work the other way around (e.g. from the bathroom to other rooms).
Chimneys over the roof to be fixed. On the other hand, the gas boiler and the boiler room must have an air intake grate located 2m above the ground. A matter to be assessed by the gas operator.

Probably the original layout of the chimneys and the location of the barrels were to enable the connection of tiled stoves, which was supposed to heat the entire house. I don't know how, in this case, the question of which barrel is pulling and which barrel should be resolved, but it doesn't matter at the moment. The part of the chimneys that protrude beyond the roof was put up there to the state that is shown in the photos.
Currently, I am interested in the extraction in each of the barrels. Possibly, blinding one (or both) of those extending from the basement, where there is a supply opening in the wall. And here I would like a professional opinion to convert it according to the art (which I do not know personally). I do not know if such a system as now does not interfere with each other or other unfavorable phenomena.

By reading 1 # again carefully I don't understand what

Pioro33 wrote:

All barrels are exposed from the top flush with the concrete cap

After all, there you can see that in the 1st and 2nd photos the chimney has 2 grates in the side pipes and a pipe in the middle one. How am I to understand the word "discovered"?

Let me put it differently: the barrels are open from the top, which means that there are "holes" in the concrete cap (3 to be precise, because that is the number of barrels). So we have each barrel uncovered from the top thanks to the holes in the cap, with a side grate (on one side of the chimney) - except for one barrel with grids on both sides (this information is in the description).

Pioro33 wrote:

barrels open from the top, it means that there are "holes" in the concrete cap

I look at the photos and I can't see it, they are not shown exactly in advance. The last photo shows the chimney from above and where are these holes?

Indeed, in the second funnel, the side barrels are not open at the top. I made a mistake in the description but the problem still exists (I corrected the description).

When looking for information, I can say that my two chimneys are not placed correctly, or at least they are not placed in accordance with the instructions saying that they should be at least 60 cm above the ridge. In fact, I find that they are placed flush with the ridge or up to 10cm above.

This is probably the answer to some of the problems.
In this case, it is closest to me to solve:

1. Make 2 new concrete caps for the chimneys (each with 3 round holes) and insert the chimney caps supporting the chimney draft into the holes (with a piece of pipe inserted into the holes - no pipe in the entire barrel). The recessed pipe will be long enough to enter the chimney and protrude 60cm above the ridge (which I hope will eliminate the problem of the current height of the chimney and will not cause the need to build it higher.
With this solution, side grilles will be bricked up or tightly closed.

Thanks to this, I hope that I will force an extract from the rooms that I care about.

I will be grateful for comments on the direction I want to go.