Ventilation Systems – Projects and Qualified Teams

Ventilation construction covers the design and installation of ventilation and air-conditioning systems for residential, commercial, and industrial buildings. The trade ranges from central residential HRV systems through AHU plants for offices and hotels to specialised industrial systems with pollutant extraction, cleanroom technology, or smoke control. Key factors are correct air volumes, low flow velocities to control noise, leak-tight ducting, sound insulation, and fire stops at penetrations. Example Germany: residential ventilation per DIN 1946-6, AHU hygiene per VDI 6022, fire dampers per DIN 18017-3.

FAQ

How much do ventilation systems cost per m² of living area?

Which air volumes are required?

Which duct systems are standard?

Which hygiene requirements apply?

How is the system balanced?

What are the most common defects?

How much do ventilation systems cost per m² of living area?: Example Germany: central residential ventilation with heat recovery 50–80 €/m² living area (unit, ducts, terminals complete). Decentralised pendulum units 800–1,500 € per device. Commercial AHU 80–150 €/m² depending on complexity. In Poland 30–40 % below German levels.
Which air volumes are required?: Example Germany: per DIN 1946-6 reduced ventilation 0.3–0.5 air changes/h, nominal 0.4–0.6/h, intensive 0.5–0.8/h. Living room 30 m³/h supply, bathroom/WC 40–60 m³/h exhaust, kitchen 60–80 m³/h exhaust.
Which duct systems are standard?: Spiral seam ducts (round, galvanised steel) for visible main ducts and risers. Flat ducts for floor distribution in slabs. In residential, semi-rigid PE pipes (Zehnder ComfoTube, Helios FlexPipe) with manifold are increasingly common – faster, tighter, antibacterial.
Which hygiene requirements apply?: Example Germany: per VDI 6022 annual hygiene inspection of AHUs, filter change at least 2× per year, duct cleaning as needed. Residential ventilation much less strict – filters every six months, unit inspection every 5 years.
How is the system balanced?: With a calibrated vane anemometer at each supply and exhaust diffuser: measure design flow, adjust dampers, document. Mandatory record for the client. Comfort systems with VAV control balance automatically.
What are the most common defects?: Excessive air velocity with whistling, leaky duct joints with energy loss, missing silencers at the unit, condensing fresh-air duct without vapour barrier, fouling from construction-phase operation without protective kit.

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