Ventilation Duct Cleaning — Cleaner Indoor Air with Professional Duct Cleaning

Ventilation ducts accumulate dust, grease, pollen, and other contaminants over the years. Dirty ducts significantly reduce ventilation efficiency because the cross-sectional area of the ducts decreases as deposits build up. In practice, this means that air does not circulate sufficiently in the dwelling, even if the air handling unit is operating normally.

Dirty ventilation ducts can also spread contaminants and microbes into the indoor air. This can cause significant health problems, especially for allergy and asthma sufferers. According to health authority recommendations, ventilation ducts should be cleaned at least every 5 to 10 years depending on the building's intended use.

Ventilation duct cleaning is performed using professional brush machines and negative pressure extractors. The cleaning process proceeds in stages:

• Initial inspection: The condition and level of contamination of the duct system are assessed before work begins
• Negative pressure setup: A negative pressure machine is connected to the duct system, which extracts loosened dirt directly into a collection unit
• Brushing: The ducts are cleaned with rotating brushes that dislodge built-up dirt from the duct walls
• Valves and terminals: Supply and exhaust air valves are removed, washed, and reinstalled
• Final inspection: The success of the cleaning is verified through a visual inspection

Cleaning the ventilation ducts of an entire dwelling typically takes 2 to 4 hours depending on the size of the home.

The price of ventilation duct cleaning depends on the size of the dwelling, the extent of the duct system, and the level of contamination. Typically, duct cleaning for an apartment costs 300 to 600 euros and for a detached house 500 to 1,200 euros.

Factors affecting the price include:

• Total length and branching of the duct system
• Level of contamination and possible blockages in the ducts
• Number of terminal devices and valves
• Type of ventilation system (mechanical or gravity-based)

The cleaning cost pays for itself through improved indoor air and reduced energy costs, as clean ducts reduce the energy consumption of the air handling unit by up to 10 to 20%.

The need for duct cleaning can manifest in many ways in everyday life. The following signs indicate that the ducts should be cleaned:

• Stuffy indoor air — the air feels heavy and humid despite normal ventilation
• Dust accumulation — surfaces accumulate more dust than usual in a short time
• Odor problems — unpleasant smells come from the ventilation system
• Noise issues — the ventilation system produces louder than usual sounds
• Allergy symptoms — residents suffer from increased respiratory symptoms or allergies

If duct cleaning has never been done in the dwelling or if more than 10 years have passed since the last cleaning, it is highly recommended. Ducts should also be cleaned after renovations to remove construction dust.

Professional ventilation duct cleaning brings numerous benefits to residents and the property:

• Better indoor air: Clean ducts deliver fresh air without contaminants and microbes
• Energy savings: The air handling unit does not need to run at maximum power, which lowers the electricity bill
• Healthier environment: Allergy and asthma symptoms are reduced thanks to cleaner air
• Longer service life: Regular cleaning extends the lifespan of the entire ventilation system

During cleaning, it is also advisable to check the duct system's airtightness and the condition of the valves. This ensures there are no leaks in the duct system that reduce ventilation efficiency. If needed, we also recommend ventilation adjustment after cleaning.