Heritage Pubs: Ventilation Without Wrecking the Character

A sequence that protects both the building and the kitchen

1. Survey the historic fabric before you draw a single duct run. Get a measured look at wall thicknesses, timber frames, chimney breasts and any concealed decorative plaster, because these decide where a duct can honestly go and where it cannot. On a listed building the aim is to route services through voids, redundant flues and existing openings so that nothing original is cut, drilled or lost. This early survey is also your evidence base if consent is later queried.
2. Bring the conservation officer in early, not at the objection stage. New external flues, extract terminals and plant almost always need listed building consent, and street-facing elevations are the hardest to win. A pre-application conversation lets you test discreet options - a rear termination, a reused chimney, a colour-matched cowl - before money is committed. Our wider notes on managing ventilation in listed and heritage buildings go through what officers typically ask for.
3. Route the extract to respect the elevation. Wherever possible, take the duct up through an existing chimney stack or an internal void and terminate high and out of sight, rather than penetrating a visible wall. Reusing a redundant flue is often the single move that turns a refusal into an approval, because it adds nothing new to the skyline. Where a new penetration is unavoidable, keep it small, keep it to a secondary elevation, and match the finish to the surrounding stone or render.
4. Size and specify for the cooking, not the fashion. Extract rates should follow the canopy and the appliance line under EN 16282 and DW/172, so the system actually captures the grease-laden air a heavy pub grill produces. Undersizing leaves smoke and heat in the room; oversizing wastes energy and pulls warmth straight out of the bar. Get the volume right first and the ducting can then be as compact and well-hidden as the fabric demands.
5. Design out the noise and the odour at the same time. Old pubs sit cheek by jowl with homes, so a planning odour and noise assessment - often measured against BS 4142 - is frequently the deciding factor. Larger fans running slowly, in-duct silencers, acoustic enclosures and a well-placed cowl all cut the nuisance without a bigger visual footprint. Our guidance on acoustic design for kitchen ventilation covers how to keep a late-night kitchen quiet for the flat upstairs.
6. Build in proper access for cleaning from day one. TR19 Grease requires access panels of sufficient number, size and quality that the whole run can be inspected and cleaned, and retrofitting them into a listed wall later is painful and destructive. Position removable panels at every bend and at sensible intervals along straight runs while the ceilings are open. This one decision decides whether the system can ever be kept compliant.
7. Set a realistic cleaning frequency and record it. A hard-working pub kitchen running twelve to sixteen hours is usually a three-monthly clean under TR19 Grease, with lighter operations less often. Agree the interval against the measured grease load rather than guesswork, and diarise it so it never slips. The cheapest way to protect an irreplaceable building from a grease fire is simply to clean the duct before the deposit builds.
8. Commission, document and hand over a compliance file. Balance the system, verify the airflow, and issue a post-clean report with before-and-after deposit readings and photographs. Keep the listed building consent, the drawings, the access-panel schedule and every cleaning certificate together in one place. That file is what satisfies your insurer, your fire risk assessor and the next licensee alike.