The key points
- Ducting outdoors and returning filtered air have different outcomes.
- Confirm the complete air route and any required building approvals.
- Check recirculation kits and grease-filter care for the exact model.
Understand what happens to the air
An externally ducted hood needs a compliant route to an outdoor discharge point. An installer must assess that route rather than treating an existing hole or ceiling space as sufficient. The plan should account for the building structure, discharge requirements and other relevant services, especially in an apartment or a home with another storey above.
A recirculating hood returns air through the model's approved filtering and outlet arrangement. It does not provide the same removal of moisture from the home as discharging cooking air outdoors. If you cook with gas, ask a licensed gasfitter to assess the room's ventilation requirements; an odour filter is not confirmation that the ventilation arrangement is suitable.
Assess a ducted route as a complete system
Ask the installer about duct material, the required diameter, route length and bends using the exact rangehood instructions. Manufacturer guidance commonly favours a short, straightforward route for effective airflow and manageable noise. Do not assume the hood's advertised airflow will be reproduced through an unsuitable existing duct simply because the connection can be made to fit.
Include the outdoor termination and any building approvals in the quote. Where a shared wall, roof or common property is involved, establish who can authorise the work before purchase. A clear scope should identify the entire air path, not stop at a connection hidden above the kitchen cabinets.
Check recirculation parts and running care
A model capable of recirculation may require separately supplied carbon filters, a diverter or another kit. Fisher & Paykel's box-chimney instructions, for example, identify additional recirculation components. Confirm the approved parts for your exact model and whether they accompany the individual unit you intend to buy.
The return-air outlet also needs to be planned so the filtered air can re-enter the room as intended. Ask how filters are accessed and what ongoing replacement or regeneration the manufacturer requires. Both ducted and recirculating hoods need grease-filter care; sending air outdoors does not remove that maintenance responsibility.
Compare two installed options
If both arrangements are possible, obtain a complete quote for each and consider moisture removal, cabinet space, filter care and the changes required to the building. If only recirculation is practical, verify that the chosen appliance and room arrangement meet the relevant requirements rather than treating the limitation as automatic approval for any hood.
When reviewing Value House listings, record the exact model, condition, included filters and any recirculation components. Warranty information varies by item. Resolve the air route and missing-part questions with your installer, then arrange pickup by appointment once you are comparing a complete installation rather than a canopy alone.
Before you buy
- Have the air route assessed.
- Confirm outdoor discharge or return-air provisions.
- Identify all required filters and kits.
- Compare the complete installed cost.
Sources & further reading
Prepared with AI assistance using the manufacturer and Australian guidance linked below. Check the exact model’s documentation when planning a purchase or installation.
