Ventilation in apartment blocks: why this is now a trustee issue

Keeping your building healthy is not a nice-to-have. It is value retention, fewer complaints and peace of mind. In blocks with many resident profiles (smokers/non-smokers, many-cooks/little-cooks, care residents), a central system often reaches its limits in practice. The solution that does work in renovated and occupied buildings: decentralized D-ventilation per apartment/room..

Recognizable problems

Odor and smoke migration Through shared shafts/channels.
Heavy air in corridors and apartments at peak occupancy.
Maintenance backlog: filters/channels receive too little attention → more resistance, more noise, less flow.
Discussions: "with me it draughts", "with me it smells", "the meter turns off" - everyone experiences something different, no one is right.

Fire & smoke: the forgotten risk factor

Central duct networks-if not perfectly designed, provided and maintained-are a highway for smoke and heat. There are vapor and smoke management systems for that, but they require discipline in inspection and maintenance.
Decentralized you have no shared distribution between apartments: each apartment is its own circuit. That limits the chance of smoke transmission between living units. Modern units can also be linked to detection/gateways to allow for safe switching in the event of an alarm safe switching (e.g. stop or controlled exhaust according to the fire concept). Ventilation does not replace fire protection; it does make the building more manageable.

Why central often works against it in populated blocks

One institution for all does not work with heterogeneous residents.
Duct hygiene: hidden contamination, specialist cleaning required; delay leads to odor complaints and loss of efficiency.
Pressure leaks and recirculation can create complaints (and sometimes infection risks) building-wide circulate.

Why decentralized does work

Compartment: no shared ducts → odors/smoke remain at the source.
Comfort & energy: heat recovery (WTW) keeps heat inside; windows can be closed → less noise and dust.
Per apartment/per room control: night mode in bedroom, boost in kitchen; automatic control on Moisture/VOC.
Measurable & fair: real-time values per unit; discussions replaced by data.
Maintenance focused: units individually detect when filter cleaning/change is needed (light/app); occupant can do it themselves; frequency is use-dependent (candles/smoke/pets/traffic) at source; no building-wide ductwork that needs to be cleaned.

"But what about the nuisance?"

Decentralized is focused work, unit by unit. One core bore per room, neat finish, low noise and dust. No need to "open up" the building. Ideal to phased work (riser at a time, floor per week) with minimal disruption to neighbors.

Realistic scenarios

Smoke and cooking odors in one riser pipe → compartmentalize with decentralized WTW, seal gaps, avoid base overpressure.
Service flats/vulnerable residents → per flat decentralized WTW + visible measurement in corridor; avoid recirculation; protocol in case of outbreaks (boost/filters).
Designated renovation → centralized intervention is unfeasible; decentralized phased: 1-2 apartments/day.

Deciding with reason

Zero measurement: CO₂/VOC in peak hours, odor complaints per stack/zone.
Channel audit: leaks, dampers, maintenance status.
Pilot: 1 facade zone decentralized → 4-6 weeks measure and survey.
Rollout: phased, start at largest complaint areas.
Management plan: filter alerts tracking (not on fixed calendar), annual visual check, and logging access for VME.

Relevant links

Next step?

We make a plan per riser and per apartment (including phasing, maintenance and EPB reconciliation). Leave your address and two times; we'll pinpoint an appointment right away.