Can you clean the ventilation yourself?

Ventilation is the lungs of a home, and if it's not maintained, the air becomes heavy, humid, moldy, and odorous. A logical question: can you just grab a brush and gloves and clean everything yourself?

Answer: yes, but not everything and not always. Let's take a closer look.

What types of ventilation are there?

Natural (non-motorized)

The most common in apartment buildings. Air is exhausted by draft through a shaft in the wall. You can only clean your own section: from the grate to the entrance to the ventilation shaft.

Mechanical (motorized)

Found in private homes, cafes, and modern apartments. Dirt accumulates in ducts, fans, filters, and valves. You can change filters, wash grilles, and clean the fan, but deep cleaning requires professionals.

What you can clean yourself

  • Ventilation grilles: Can be removed and washed in a soapy solution or grease remover (kitchen cleaners, baking soda, or steam cleaner).
  • The duct in your apartment: You can brush it or vacuum it with a narrow nozzle, up to an arm's length. Note: If draft doesn't improve, the problem is in the general ductwork.
  • Fan: Remove the casing, wipe the blades to remove dust/grease, and lubricate the bearing if designed.

What you absolutely must not do

1. Climbing into a house's ventilation shaft: You could collapse the masonry, fill the house with mold, or block air flow for neighbors. This risks fines and accidents.
2. Using water "by the pour": Excess water in the shaft leads to dampness and mold development.
3. Installing dampers or bricks: Blocking a draft is prohibited and dangerous (risk of carbon monoxide poisoning with gas appliances).

How to check the draft (simple methods)

Method 1: Paper Place a sheet against the grate. If it sticks, there's a draft. If it falls, there's no draft.
Method 2: Flame If a candle flame leans toward the grate, it's working. Be careful with wooden shafts!

Signs that the ventilation is clogged

  • The apartment is damp
  • There's a musty smell
  • Windows are fogging up
  • Mold in the corners
  • Solution from dust on the grate turned black

When to call Specialists

If there is no draft at all, smells from neighbors enter your home, or you have mechanical/industrial ventilation, call the pros. Professionals use: video diagnostics, industrial vacuums, mechanical brushes, and antiseptic treatment.

Common treatments:
Grease removers Antiseptics Steam treatment UV disinfection

Summary: The simple rule

If you see dirt, you can clean it. If you can't see what's inside, it's best not to climb in.

Do: Clean grates, vacuum accessible duct areas, maintain fans, replace filters.
Don't: Climb into common shafts, destroy masonry, or block ventilation.