Kitchen Ventilation & Make-Up Air in Los Angeles, CA
Restaurants across Los Angeles often occupy older tenant spaces where a hood was installed long before the current kitchen layout. When make-up air is short, the dining room feels pulled, doors are hard to open, and the hood loses capture. Davinci Mechanical looks at exhaust fan performance, make-up air unit operation, and overall kitchen balance as a system, so comfort improves and the equipment stops fighting itself. This is ventilation and air balance work, not hood or duct cleaning.
A sprawling mix of high-rise offices, production and creative space, food distribution in the industrial core, and a long LAX-adjacent logistics corridor, all under one of the state's most demanding permit environments.
How kitchen ventilation & make-up air work plays out in Los Angeles
The symptom that brings a Los Angeles restaurant to this service is a front door that will not stay shut. A storefront on Sunset in Silver Lake, a Thai kitchen on Hollywood Boulevard, a Koreatown barbecue house with tabletop grills and a hood system sized for a different menu: the exhaust fans pull harder than the make-up air supplies, the dining room goes negative, doors slam, pilot lights blow out, and the hood stops capturing because there is no air to replace what it removes. In summer the problem compounds, since the dining room's conditioned air is being dragged across the cooking line and out the roof.
The buildings cause most of it. Older commercial strips across Mid-City and the Eastside were never designed for current cooking loads, and tenant turnover means a hood was installed for one concept and the kitchen was re-equipped for another. Roof space is shared with neighbors, so the make-up air unit is undersized or missing because there was nowhere to put it. Newer food halls and restaurant rows downtown and in the Arts District are better designed but run multiple kitchens on shared systems, where one tenant's exhaust upgrade throws off everyone else's balance.
Getting it right means measuring exhaust and supply airflow, checking make-up air unit operation and tempering, confirming interlocks, and balancing the kitchen against the dining room and the neighbors. The result is a dining room that stays comfortable, a hood that captures smoke, and gas appliances that stay lit. To be clear about scope: this is the air-side work. Grease cleaning of hoods and ducts belongs to a separate hood-cleaning trade. The restaurants industry page covers how ventilation fits with refrigeration and rooftop service for LA operators.
Los Angeles's climate and what it does to this equipment
Los Angeles has a Mediterranean climate, but the city spans very different conditions. Areas near the coast stay under the marine layer through much of late spring and early summer, while the basin and downtown run noticeably hotter in late summer and early fall, and Santa Ana wind events can bring dry heat and blowing dust. Equipment sees long cooling seasons, and rooftop condensers in urban areas collect soot, leaf litter, and airborne grime. Older buildings with undersized airflow often show problems only during the first stretch of real heat, which is exactly when response time matters most.
For the equipment background behind this page, read our kitchen ventilation and make-up air guide or the full Kitchen Ventilation & Make-Up Air service page.
- Downtown Los Angeles and the Historic CoreConverted older buildings, high-rise offices, and new mixed-use towers, with a mix of central plants, VRF, and rooftop equipment that often needs careful hoisting and access planning.
- Mid-Wilshire, Miracle Mile, and Century CityDense office towers and professional suites along Wilshire, where chilled water systems, after-hours scheduling, and tenant-sensitive work windows shape every service call.
- Hollywood and studio-related production spaceProduction offices, post-production suites, and sound-sensitive rooms where noise, humidity, and tight temperature control matter as much as capacity.
- Arts District, Vernon-adjacent industrial, and the LAX corridorFood distribution, cold storage, and warehouse buildings east of downtown, plus hotels and logistics buildings along the airport corridor on the west side.
- Make-up air unit service, repair, and replacement
- Exhaust fan belts, motors, and airflow verification
- Kitchen-to-dining pressure balance so doors and hoods behave
- Documented readings, not guesses, on airflow and temperature
What a kitchen ventilation & make-up air visit includes, and the problems we most often find
- Walk the kitchen during or near service to see what the building actually does
- Measure exhaust and make-up airflow, temperatures, and building pressure
- Inspect fans, belts, motors, dampers, burners, and controls
- Repair or adjust, then re-measure to confirm the balance
- Document results and flag items for the hood-cleaning and fire-protection vendors to handle
- Make-up air that is undersized or off, pulling conditioned air from the dining room
- Exhaust fan belts and bearings worn, cutting airflow below what the hood needs
- Kitchens running negative, causing hard-to-open doors, drafts, and burner issues
- Make-up air units with failed burners or controls during cold or hot weather
Kitchen Ventilation & Make-Up Air in Los Angeles: questions we get
Our restaurant shares a roof with four other tenants on Melrose and there is no room for a make-up air unit. What are the options?
There are usually a few. A smaller make-up air unit can sometimes be fit on a wall or in a side yard with a tempering coil, or the existing rooftop package can be modified to bring in additional outside air interlocked with the hood. In some cases the hood exhaust rate can be reduced with a different filter or fan setting if the menu allows. The measurement visit identifies which option actually balances the space before anything is proposed.
LA County health inspectors flagged our hood for poor capture even though it was just cleaned. Is that a cleaning issue or a ventilation issue?
If the hood is clean and still not capturing, it is almost always an air balance problem. Without enough make-up air, the exhaust fan cannot move its rated volume, and smoke rolls out the front of the hood. Measuring the exhaust airflow and the make-up supply, then correcting the shortfall, is what restores capture. A clean hood with no air to pull is still a hood that does not work.
Do you clean hoods and ducts?
No. Hood and duct cleaning is a separate specialty. We handle the mechanical side: exhaust fans, make-up air, and HVAC balance.
Why is my dining room hot when the kitchen is running?
Often the make-up air is not matched to the exhaust, so the kitchen pulls conditioned air from the dining room. Measuring airflow and pressure shows where the balance is off.
Can you replace a make-up air unit?
Yes. We size to the hood's exhaust requirement, coordinate permits, and handle rigging and controls.