How Long Does Commercial Hood Cleaning Take?

Why nobody should quote you a duration sight unseen

Two kitchens with identical square footage and identical hood dimensions can differ by several hours, because the time is not in the hood. It is in the duct run, the fan, and how much grease is waiting. A company that gives you a firm duration before seeing the system is guessing — and the guess usually gets resolved by cutting scope.

The factors that set the timeline

Number of hoods and systems

Each hood adds its own canopy, filter bank and plenum. A hotel with a breakfast line, a banquet kitchen and a leased restaurant is three jobs sharing a roof, not one big one.

Duct length and routing

A short vertical riser straight to a rooftop fan is quick. A long horizontal run threading through a converted mill building in NoDa or South End, with bends and limited openings, is the single biggest time variable there is.

Access panels

A well-panelled run is cleaned along its length efficiently. An under-panelled run means either fitting new access — which adds time on that visit and saves it on every visit after — or leaving sections uncleaned, which should never be the silent option. See exhaust duct cleaning.

Grease load

This is the factor operators control. A system cleaned on interval releases its grease quickly. A system a year overdue needs repeated application, dwell time and mechanical work, and can double the time on site. It is also the reason recurring service tends to cost less per visit.

Roof access

A hatch and a straightforward fan is fast. An Uptown high-rise needing building-management escort, a service lift booking and a specified work window adds coordination time before anyone touches the fan.

Cooling-down time

Nothing starts on hot equipment. If the line shuts down at close and the crew arrives immediately, the first part of the visit is spent waiting.

Planning the kitchen around it

• Book the work for after close or before opening, not across a service period
• Ask for an estimated window at quote stage, once the system has been assessed
• Have the line cool, cleared and accessible on arrival — see how to prepare
• Arrange roof access in advance if a landlord or building manager is involved
• Expect a longer first visit if the system has no service history or needs access panels

The honest framing

Ask for the estimate after the assessment, and treat an unusually short quoted duration as a scope question rather than a bargain. The scope guide lists what has to fit inside that time, and the cost page explains how the same variables show up in price.