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Duct Cleaning

Duct Cleaning near you

Duct cleaning in Britain is a smaller and more specific job than the phrase suggests. Because the typical home is heated by radiators rather than ducted air, there is normally no network of supply and return ducts carrying dust around the house, and no central system to put a rotary brush through. What there is to clean is the extract side: grease-laden cooker hood filters and the duct behind them, the run serving a bathroom or utility fan, and, in homes that have one, the filters and duct network of a mechanical ventilation with heat recovery unit.

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That matters when you are reading a quote. Claims built around whole-house duct systems, or promises about health benefits from cleaning ducts a British house does not have, deserve scepticism. The useful version of this work is narrower and quite measurable: restoring an extract route that has silted up, degreased a kitchen duct, changed filters that are choking an MVHR unit, and then proved the air flow rate again in litres per second.

The other half of the job is knowing when cleaning is not the answer. If a bathroom has streaming windows and black mould, a blocked duct is one possible cause among several, and government guidance is clear that damp and mould usually trace back to the building rather than to the people in it.

What a duct cleaner actually cleans in a UK home

  • Cooker hood grease filters and the duct behind the hood, where deposits build fastest and do most to reduce flow.
  • Bathroom, shower room and utility extract fans, their grilles and the duct run to the outside terminal.
  • MVHR filters at the unit and, where fitted, filters at room terminals, which are the routine consumable of a heat recovery system.
  • MVHR supply and extract ductwork, including the valves at ceiling terminals that are often painted over or wound shut.
  • The heat exchanger cell and condensate drain of an MVHR unit, which the manufacturer's instructions will cover.
  • Warm-air heating ducts in the minority of homes that still have a gas warm-air system.

Signs the extract side needs cleaning or servicing

  • The bathroom mirror stays fogged long after a shower, or the window runs with condensation that used to clear.
  • A fan sounds busier than it used to but moves noticeably less air at the grille.
  • Visible fluff, dust or greasy film around a grille, or a rattling flap at the outside terminal.
  • An MVHR unit running louder, or a boost setting that no longer makes an audible difference.
  • Filters that look grey and matted, or that have not been changed within the interval in the manufacturer's instructions.
  • Cooking smells lingering through the house, or a kitchen hood that spills steam around its edges.
  • Black mould reappearing in the same corner of a wet room after being cleaned off.

What a thorough clean and recommission involves

A competent visit starts by establishing what the system is and what it is supposed to deliver, then measuring what it delivers now. Approved Document F expects the air flow for each extract or supply fan or terminal to be recorded in litres per second, which gives an honest before-and-after rather than an impression that things feel better.

From there the work is physical and unglamorous: removing and washing or replacing filters, degreasing hood components, cleaning grilles and valves without altering the positions they were balanced to, and clearing the duct itself through the access points. Approved Document F expects reasonable access for maintaining ventilation systems, including access to replace filters, fans and coils and access points for cleaning ductwork, so a system designed properly can be cleaned without demolition.

Balancing deserves a warning. On a mechanical system the terminals were set to distribute a designed flow, and closing them further makes the fan work harder rather than reducing total flow, because the unit maintains a constant volumetric rate. Valves should go back exactly as they came off, and the flows should be re-checked afterwards.

What cleaning will not fix

Cleaning restores a route that has been narrowed by deposits. It cannot create capacity the installation never had, and a surprising share of call-outs are really design faults wearing a maintenance disguise: a fan too small for the room, three metres of collapsed flexible hose where the guidance allows 1.5 metres, a duct terminating in the loft, or a door with no undercut so there is no replacement air to draw in.

Damp and mould deserve particular honesty. Government guidance on the health risks of damp and mould states that the fundamental cause lies in building deficiencies, inadequate ventilation, inadequate heating and/or poor energy efficiency, and that it is totally unreasonable to blame damp and mould in the home on lifestyle choices. Condensation, described there as the most common form of damp, happens when moisture generated inside the home cools and condenses onto colder parts of the building. A cleaned duct helps only if inadequate extract was genuinely part of that chain.

The same guidance sets out the health stakes, noting that the respiratory effects of damp and mould can cause serious illness and, in the most severe cases, death, with people who have pre-existing respiratory conditions, weakened immune systems, children, older people and pregnant women among those most at risk. That is a reason to diagnose the cause properly rather than to buy a cleaning cycle and hope.

The routine a household can keep up between visits

Most of what keeps extract ventilation working is small and regular. Cooker hood grease filters go in the dishwasher or the sink on a schedule you can remember; fan grilles come off and get washed; MVHR filters are changed at the interval the manufacturer states, which is the single most effective piece of upkeep on a heat recovery system.

Your reference for all of it is the handover pack. The regulations require the person carrying out ventilation work to give the owner sufficient information about the building's ventilation system and its maintenance requirements so that it can be operated to provide adequate ventilation, and Approved Document F expects that to be clear and simple written guidance. If you bought the house and never received it, ask the installer or manufacturer for the operating and maintenance instructions before paying anyone to guess.

Older buildings, rented homes and where the law bites

Cleaning is not notifiable work, but the surfaces around it can be. HSE states that asbestos may be part of any commercial or domestic building built or refurbished before the year 2000, and that work which disturbs suspected asbestos should stop immediately so that it can be identified or assumed to be asbestos and risk assessed, under the Control of Asbestos Regulations 2012. Pulling an old extract unit out of a textured ceiling coating is exactly that situation.

Renters and social housing tenants have a stronger position than they often realise where damp and mould is involved. Awaab's Law applies to registered providers of social housing, and its first phase came into force on 27 October 2025, covering damp and mould hazards and all emergency hazards. Under it, emergency hazards must be investigated and made safe within 24 hours, while significant hazards must be investigated within 10 working days, with a written summary to the tenant within 3 working days of the investigation finishing and relevant safety work completed within 5 working days.

Finding someone for extract and MVHR cleaning on LokalMatch

Tell a prospective cleaner what you have before agreeing anything: hood and fan only, or a heat recovery unit with a duct network, and the make and model if you know it. A quote for a whole-house duct clean in a house with radiators and two extract fans is a sign the conversation started from the wrong assumption.

Through LokalMatch, you set out the job a single time, including the system type and what has gone wrong, and pros who cover your area contact you directly. Those pros pay for the requests, which funds the service; LokalMatch itself performs no cleaning, sets no prices, and does not vet, rank or recommend the businesses that respond, so the checks on experience and insurance are still yours to make.

Duct Cleaning: frequently asked questions

How often should domestic ducts be cleaned?

There is no fixed national interval for homes. Work to the manufacturer's operating and maintenance instructions, which the installer is required to hand over, and to what the system is telling you: filters that look matted, flow that has dropped, or an extract that no longer clears steam. Cooker hood filters need attention far more often than duct runs.

Will cleaning the ducts get rid of my damp and mould?

Only if restricted extract was part of the cause. Government guidance attributes damp and mould to building deficiencies, inadequate ventilation, inadequate heating and/or poor energy efficiency, and states plainly that blaming it on lifestyle choices is totally unreasonable. Have the cause diagnosed, because cleaning a duct that was never the problem changes nothing.

I rent from a housing association and there is mould. What are my rights?

Awaab's Law applies to registered providers of social housing and took effect in its first phase on 27 October 2025 for damp and mould and all emergency hazards. Significant hazards must be investigated within 10 working days, with a written summary within 3 working days of the investigation ending; emergency hazards must be investigated and made safe within 24 hours.

Can I change MVHR filters myself?

Usually yes, if the unit is safely reachable and you follow the manufacturer's instructions, since filter changes are designed as routine upkeep. Cleaning inside the ductwork, touching the heat exchanger or altering terminal valves is different, because the flows were balanced on commissioning and should be re-measured in litres per second afterwards.

Is duct cleaning risky in an older property?

It can be, which is why the building's age matters. HSE advises that any building built or refurbished before the year 2000 may contain asbestos and that work should stop immediately if suspected asbestos is disturbed, pending identification and a risk assessment. Removing fans or grilles set into old coatings and boards is the moment to be careful.

Sources

  1. Approved Document F, Volume 1: Dwellings, 2021 edition (PDF)
  2. GOV.UK: Ventilation, Approved Document F
  3. GOV.UK: Understanding and addressing the health risks of damp and mould in the home
  4. GOV.UK: Awaab's Law, guidance for social landlords
  5. HSE: Asbestos frequently asked questions

Written by the LokalMatch editorial team. Last reviewed 14 September 2026. How we write and check our guides

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What affects the cost of duct cleaning

Prices depend on the details of your project. We only publish price ranges when they’re backed by real LokalMatch quote data or reliable sources. Until then, here’s what usually changes the price:

  • Type of system and fuel source
  • Size and efficiency of the equipment
  • Condition of the existing ductwork and venting
  • Electrical or gas line changes
  • Access to the furnace room, attic or outdoor unit location
  • Removal and disposal of the old equipment
  • Emergency or after-hours service

How to compare duct cleaners before you hire

  • Hire a technician who is licensed for heating, cooling and gas work in your area.
  • For a new system, ask for a load calculation for your home rather than a size based on the old unit.
  • Get written quotes that list the equipment, ductwork changes, removal of the old unit and any electrical work.
  • Ask how they handle service calls and repairs after installation, including in the middle of winter.
  • Compare the full scope of each quote, not only the equipment on it.

Questions to ask duct cleaners before you hire

  • Are you licensed for this type of heating, cooling or gas work in my area?
  • How did you decide what size of system my home needs?
  • Does this installation need a permit, and will you take care of it?
  • What does the manufacturer's warranty cover, and what does your labour warranty cover?
  • Will you need to change the ductwork, venting or electrical to make this work?
  • Do you offer maintenance plans, and what do they include?
  • How quickly can you respond if the system stops working?

When to call a pro for duct cleaning

  • If you smell gas, leave the home and call your gas utility's emergency line from outside.
  • If a carbon monoxide alarm goes off, get everyone outside and call emergency services.
  • No heat in cold weather, or a furnace that keeps shutting off
  • Unusual noises, burning smells or a big jump in energy use

Duct cleaning permits and local rules

Some duct cleaning work needs a permit or has to meet local bylaws. Rules vary by municipality, so ask your pro whether a permit is needed and who will apply for it — and check with your city or town if you’re unsure.

Permits and licensing

Seasonal maintenance

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