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clean or replace air filters
Home Improvement

Clean or replace air filters and vents

Dust the vents and swap clogged filters — better air and lower running costs in under an hour.

Time:
60 min
Cost:
low
Difficulty:
easy
Where:
Indoors
Best:
Solo

Almost every home has more filters than the occupants realize. Heating or cooling systems, extractor hoods, bathroom fans, tumble dryers, vacuum cleaners, and often the boiler. To clean or replace air filters across all of them takes an hour, improves the air noticeably, and makes several appliances measurably more efficient.

Why clean or replace air filters and vents is worth an hour

A blocked filter forces the appliance behind it to work harder for the same result, which costs energy and shortens its life. In the case of extractor fans and dryers, the restriction is also a fire and moisture risk. The air quality effect is the most immediately noticeable, particularly in bedrooms and for anyone with allergies.

How to clean or replace air filters and vents step by step

  1. 1

    Find every filter in the house

    Heating and cooling, cooker hood, bathroom fans, dryer, vacuum. Make a list; most people miss at least two.

  2. 2

    Check which are washable

    Metal mesh hood filters and many vacuum filters wash; paper and pleated ones must be replaced. Washing a paper filter destroys it.

  3. 3

    Degrease the cooker hood filter

    Hot water with detergent, or the dishwasher if the manufacturer permits. Grease-clogged filters are a genuine fire risk.

  4. 4

    Vacuum the vents and grilles

    Wall and ceiling vents accumulate dust that then circulates. The brush attachment handles this in a few minutes.

  5. 5

    Note sizes and set a reminder

    Write down each filter size so reordering is trivial, and put the next change date in your calendar.

Tips to get more out of it

  • Clear the dryer lint filter after every load, and check the external vent annually. Lint build-up is a common cause of house fires.
  • Let washed filters dry completely before refitting. A damp filter grows mould and smells worse than the dust did.
  • Never block airbricks or trickle vents. They are there to prevent damp and, where fuel is burnt, to supply combustion air.

Ways to mix it up

If you have no ducted system, focus the hour on extractor fans and the cooker hood, which are the two most neglected and most consequential. If anyone in the house has allergies or asthma, prioritize bedroom vents and consider a higher-grade filter where the appliance supports it.

Clean or replace air filters and vents: frequently asked questions

How often should air filters be changed?

Typically every one to three months for forced-air systems, more often with pets. Check the manufacturer's guidance for each appliance.

Can I wash a disposable filter?

No. Paper and pleated filters are destroyed by water. Only metal mesh and specifically washable filters should be cleaned and reused.

Does a dirty filter really cost money?

Yes. Restricted airflow makes the appliance run longer for the same result, which uses more energy and shortens its lifespan.

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