Commercial Kitchen Extraction Alrode

Repairs and fault finding

Common service calls include weak suction, fan failure, abnormal noise, vibration, tripping, overheating, odour complaints and smoke escaping from the canopy. We start with the symptom but work through the airflow path so that a visible fault does not distract from an underlying restriction or design issue.

A fan that does not run may have an electrical, control, motor or protection problem. A fan that runs but extracts poorly points the investigation toward rotation, impeller condition, filters, duct contamination, closed dampers, restrictions or pressure imbalance. A noisy fan can require mechanical inspection before any decision is made about replacement.

Where possible, we distinguish repairable components from equipment that has reached the end of useful service. That allows the business to compare the cost and operational value of repair, motor replacement or complete fan replacement rather than automatically choosing the most expensive option.

Planning a new installation or upgrade

For a new installation, useful information includes the cooking equipment schedule, proposed canopy position, roof or wall access, ceiling voids, building management requirements and available electrical supply. Early coordination is valuable because extraction routes compete with structure, air-conditioning, plumbing and other services.

Upgrades require a different survey. We identify what already exists, whether the canopy and duct sizes remain suitable, what condition the fan is in and whether previous alterations have changed the cooking load. Reusing serviceable components can be practical, but only when they still fit the new duty and can be cleaned or maintained properly.

A clear scope should separate canopy work, ducting, fan or motor work, controls, roof or wall penetrations and any associated builders’ work. That helps the customer understand which parts of the system are being changed and which remain existing.

Local service and response across Gauteng

Our Gauteng service model is built around commercial clients who need clear communication and practical scheduling. For fault calls, sending photos of the canopy, fan, motor nameplate, controls and visible ductwork can help us understand the likely scope before arrival, although on-site diagnosis is still necessary for many airflow problems.

We work across Johannesburg, Ekurhuleni, Tshwane, the West Rand and the Vaal, linking local area pages to the most relevant service pages rather than treating each suburb as an isolated website. This helps customers move from a location search into the exact installation, repair, ducting, canopy or ventilation service they need.

For urgent operational problems, the best first message includes the location, business type, whether the fan runs, what changed, when the fault started and whether smoke or heat is escaping into occupied areas. That gives the technician a more useful starting point than a generic request for “extractor repair.”

Why complete-system diagnosis matters

A commercial kitchen extraction system is a chain, not a single appliance. The canopy has to capture the plume, filters have to intercept grease, the duct has to move air without excessive resistance, the fan has to overcome the system pressure, and replacement air has to enter the building in a controlled way. If any one of those parts is wrong, the kitchen may remain smoky or hot even after a new fan is installed.

We therefore assess the duty before recommending equipment. Cooking load, canopy dimensions, duct length, bend count, vertical rise, discharge position, operating hours and building pressure all affect performance. This avoids the common mistake of selecting a fan from diameter alone and discovering later that the installed system cannot maintain useful capture at the hood.

Existing systems also need a different approach from new fit-outs. A system that once worked but gradually weakened often points to contamination, wear, loose belts, motor deterioration or airflow restriction. A system that has never captured properly may have a more fundamental design or make-up-air problem. Separating those two situations saves unnecessary replacement work.

Canopies, capture and the cooking line

The canopy is where successful extraction starts. It should cover the heat and contaminant plume created by the cooking equipment and give the air a clear path into the filters. A canopy that is too small, mounted too high or poorly positioned can allow smoke and grease to spill into the kitchen before the fan has a chance to remove it.

Different cooking processes create different loads. Light reheating is not equivalent to chargrilling, frying or high-output wok cooking. We look at the actual equipment beneath the hood, not only the kitchen floor area. Changes to the cooking line can therefore justify reassessing an existing canopy and fan even when the original system was satisfactory.

Filter condition also affects capture. Grease-loaded filters increase resistance and can distort airflow across the canopy. Maintenance access should be practical enough that filters can be removed and cleaned without dismantling surrounding equipment or creating unsafe working conditions.

Ducting, resistance and discharge

Ductwork determines how much of the fan’s available pressure is spent simply moving air to the discharge point. Long routes, abrupt transitions, unnecessary bends, reduced sections and contaminated internal surfaces all increase resistance. The result can be weak capture even when the fan motor sounds healthy.

Good routing aims to keep the path as direct as the building allows while preserving access for inspection and cleaning. Horizontal grease duct sections should not become forgotten spaces above ceilings. Where a route passes through difficult areas, access strategy should be considered before the kitchen opens rather than after the first maintenance problem appears.

Discharge position matters locally as well. Air should be released where heat, grease and odour are less likely to re-enter the building or affect neighbours, customers and staff. Roof discharge may be suitable in many properties, while others require a carefully chosen wall or high-level termination depending on the site.

Replacement air and building pressure

Every litre of air removed by an extractor has to be replaced. If the building cannot admit enough replacement air, doors can become difficult to open, drafts may form, air-conditioning performance can suffer and capture at the canopy may weaken. This is especially common in sealed or heavily air-conditioned buildings.

Make-up air does not always require a complicated system, but it does require deliberate planning. The objective is to provide replacement air without blowing directly across the cooking plume or making kitchen staff uncomfortable. Air introduced in the wrong place can push smoke out from beneath a canopy rather than helping extraction.

When a kitchen shares a building with offices, retail space or other mechanical systems, pressure relationships can become more complex. Extraction should therefore be considered alongside supply air and the wider building environment rather than treated as an isolated fan installation.

Additional local operating considerations

Alrode facilities often have dedicated maintenance teams, three-phase electrical infrastructure and large roof spaces, but those advantages do not remove the need for kitchen-specific design. Grease-laden air should be routed and discharged separately from general process extraction where appropriate. We also consider how a kitchen shutdown will affect a large workforce, because a failed canteen extractor can create an operational problem well beyond the kitchen itself when hundreds of staff rely on scheduled meal periods.

How to prepare for a site assessment in Alrode

Before requesting a visit, note the cooking equipment under the canopy, whether the extractor currently runs, the main symptom, operating hours and any recent changes to the kitchen. Photos of the canopy, filters, fan, motor label, controls and visible ducting are useful when they can be taken safely.

For new projects, floor plans and roof information help us understand likely duct routes. For repairs, a short history of the fault is more valuable: whether performance declined gradually, stopped suddenly, became noisy after maintenance, or changed after alterations to the building.

If the premises is managed by a landlord, body corporate or facilities team, confirm access requirements in advance. Roof keys, work permits and shutdown windows can otherwise delay a straightforward inspection.

Commercial Kitchen Extraction Alrode: FAQs