Apartment ventilation

    Apartment ventilation

    Mould, stale air or smells from other apartments? We solve it without major construction work.

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    Why does an apartment need ventilation?

    In older apartment buildings, ventilation is often worn out or relies only on natural draft. In new airtight apartments the lack of fresh air is a problem from day one.

    Poor air exchange leads to bathroom mould, window condensation, headaches and insomnia. Smells from the kitchen and other apartments also travel through extract ducts.

    The typical solution for apartments is room-based wall ventilation units — compact devices installed directly into the exterior wall without long ductwork.

    A central unit covering the whole apartment is also possible but usually requires dropped ceilings and more complex planning.

    Suitable solutions

    1

    Room-based ventilation unit

    A compact wall unit (e.g. Vallox 51K, Lossnay) installed directly into the wall. Suitable for a bedroom or living room.

    2

    Apartment-wide heat-recovery unit

    A small unit (Vallox 110 MV, Komfovent Domekt) serves the whole apartment with ducts hidden in the ceiling.

    3

    Humidity-controlled extract

    A demand-controlled extract system for apartments being renovated where there is no room for ducts.

    4

    Kitchen extract solutions

    A recirculating or extracting kitchen hood integrated with the existing ventilation.

    Recommended units

    Vallox
    51K Compact

    Wall-mounted, up to 1 bedroom, quiet (16 dB)

    Vallox
    110 MV

    Whole apartment (up to 80 m²), compact, fits in a cabinet

    Komfovent
    Domekt R 200 V

    Apartments up to 100 m², high efficiency

    Mitsubishi
    Lossnay LGH-15

    Room-based, ideal for new apartments

    Flexit
    Roomie One

    Easy installation, works during renovation too

    See all units

    Price ranges

    Single room-based unit€900 – €1,800
    Apartment-wide unit (up to 80 m²)€2,500 – €4,000
    Apartment with ductwork (up to 120 m²)€4,000 – €6,000
    Kitchen extract rebuild€300 – €800
    Annual maintenance€90 – €150

    For apartments being renovated, a room-based wall unit is often the more affordable choice.

    Reference project

    Typical project: 65 m² apartment in Tallinn

    The client moved into an older panel-building apartment that was damp and stale. The existing extract was not working properly.

    We installed a room-based ventilation unit in the bedroom and a proper extract in the bathroom. The work took one day.

    Result: fresh air in the bedroom, no more stairwell smells, noticeably better sleep. Total cost €1,600 including installation.

    Common problems and solutions

    Problem

    Mould in bathroom corners

    Solution

    Proper extract plus a humidity sensor removes moisture before it settles on surfaces.

    Problem

    Smells from other apartments

    Solution

    Mechanical ventilation provides room-based supply and extract — smells cannot get in.

    Problem

    Condensation on windows in winter

    Solution

    Continuous air exchange removes moisture before it condenses on the glass.

    Problem

    Stale air in the bedroom in the morning

    Solution

    A room-based unit supplies fresh air all night — sleep quality improves noticeably.

    Problem

    Cannot run ductwork

    Solution

    Room-based wall units require no ductwork — they also suit small apartments.

    Frequently asked questions

    Request a free quote

    We reply within 24h. Consultation is free.

    Ventilation installationVentilation renovationDuct cleaningVallox unitsIndoor climate tips