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Top Floor Block Ventilation Issues: High Humidity, Chimney Height & Gas Cooker in 80s Building

tomgda 21975 6
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  • #1 16809398
    tomgda
    Level 10  
    Hello. Due to the fact that the humidity in my apartment remains at an average level of 70%, I started to get into the topic of ventilation. The case looks from scratch:

    1. I live in a 4-storey block on the top floor. Apartment plan below. The block is insulated.

    Top Floor Block Ventilation Issues: High Humidity, Chimney Height & Gas Cooker in 80s Building

    2. The ventilation chimney goes out about 1m above the roof, which is a bit low for my draft.

    3. The ventilation grille in the kitchen pulls as much as nothing, although according to the chimney sweep who came for the measurement with a "fan" is within the norm.

    4. The block is from the 80s and I am connected by a ventilation chimney with a neighbor from the second floor, i.e. the use of an extractor / fan in the kitchen grille falls off.

    5. There is a gas cooker in the kitchen (gas installation in the block).

    6. I installed the diffuser above the window in the large room ("plastic" windows ;) I do micro-sealing in the windows but the situation has not improved much and in addition it started to get too cold in the apartment and ...

    7. ... I can't heat up because the cooperative makes a scam with a company that has installed heaters and light heating during the winter period ends with a surcharge of 3-4 thousand (people are powerless because everything is "in accordance with the law" = no comment) .
    On the other hand, without heating, the temperature that stays in the apartment in the winter is 21-22 degrees, but below it can not fall by unsealing the windows because it will be too cold (one-year-old child).

    8. I bought a condenser dehumidifier 20L / 24h, 250m3 / h. I won't say it works, but only in the room where it stands. Unfortunately, its noise (like one of the quietest of its kind on the market) is hard to survive in the long run.

    A hopeless situation L Can you do something about ventilation on your own?

    What I initially invented myself in relation to the above (picture below):

    Top Floor Block Ventilation Issues: High Humidity, Chimney Height & Gas Cooker in 80s Building

    1. Change the ventilation grille in the kitchen and toilet to one that can be easily closed and opened.

    2. In a large room, make a hole in the wall (under the window) and install a ventilator with a heater with adjustable parameters. It will go out on the balcony so there should be no problems.

    3. Cut out the glass in the kitchen window and install the adjustable hood (fan).

    4. At the top of the toilet and bathroom door make a cut out for moisture emigration.

    Please verify this idea for proper ventilation. Unfortunately, I am afraid that this will not be a good solution (for various reasons), therefore I am asking for any help, how can it be done correctly and can it be done at all?
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  • #2 16809429
    mariuszp19
    Level 35  
    The situation in my block was similar and after many interventions the chimney was extended with a pipe, about 1 meter. After this procedure, the string increased and the situation definitely improved.
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  • #3 16810382
    Wlodek22
    Level 31  
    Check the draft with the window ajar, if it improves, then install two additional diffusers in a small room and obligatory in the bedroom.
  • #4 16811003
    tomgda
    Level 10  
    mariuszp19 wrote:
    The situation in my block was similar and after many interventions the chimney was extended with a pipe, about 1 meter. After this procedure, the string increased and the situation definitely improved.


    Mariusz, the neighbors are not interested in the subject and I won't do anything myself, I have already seen.
    The simplest would probably be how they would do a lift (windmill) properly adjusted by rotation
    at the exit from the chimney

    Wlodek22 wrote:
    Check the draft with the window ajar, if it improves, then install two additional diffusers in a small room and obligatory in the bedroom.


    Wlodek Check string does not improve.
    The string improves as the wind blows outside. Then it is able to hold a piece of paper against it.
    PS - In the diffuser in the large room water condenses, which confirms the weak chimney extract.
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  • #5 19066975
    Amelia888
    Level 1  
    Hello,
    I have a question, have you managed to deal with the problem of moisture?

    I have an identical apartment in the same block and if I'm not mistaken, the nickname is also from Gdańsk.
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  • #6 19082583
    __jaro__
    Level 10  
    I also have this problem. The worst thing is in the morning the water runs down the windowsills, I unseal the windows slightly, but the effect is unsatisfactory and the apartment is chilly and the heat bills increased by 1/3 during one heating season. I noticed that in the morning, apart from our cage, there is no condensation on the windows. Clearly a channel problem. The last visit of the chimney sweeps ended with a sequence of good goodbye
  • #7 19703135
    andzej00
    Level 10  
    Refreshing the topic - did the author of the topic solve his problem? I have the same problem and I am looking for a solution!

Topic summary

The discussion revolves around persistent high humidity levels (averaging 70%) in a top-floor apartment of a 4-storey block built in the 1980s. Key issues include inadequate ventilation due to a low chimney height (1m above the roof), ineffective kitchen ventilation grilles, and shared ventilation with a neighbor. Suggestions for improvement include extending the chimney height, installing additional diffusers in the apartment, and checking draft conditions. Users report similar humidity problems, with condensation on windows and increased heating costs, indicating a systemic ventilation issue within the building.
Summary generated by the language model.
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