For most of the last fifty years, the location of a commercial kitchen has been a function of where ductwork could be run. A kitchen had to reach a roof, or a shaft, or a wall it could push effluent through — at any cost. Cloud kitchens in malls. Hotel kitchens five floors below their dining room. Restaurants that needed to be on the ground floor of a standalone building because nothing else worked.
That constraint is now, for many use cases, optional.
What "ventless" actually means
A ventless extraction system replaces the duct-to-atmosphere with a multi-stage filtration package: grease, particulate, carbon, sometimes UV or electrostatic precipitation. The clean air gets returned to the room, not pushed outside. Different jurisdictions handle this differently — but the engineering is mature, the certifications exist, and the math now favours ventless in a growing number of scenarios.
What changes when you don't need a duct
- A kitchen can sit inside a basement, on a 12th floor, in a heritage building, in a shipping container.
- Cloud kitchens can rent space that was never previously fit-out for kitchens.
- Hotels can place satellite kitchens closer to the guest, not closer to the shaft.
- Capex on shaft work, structural penetrations, and exterior cladding restoration drops.
What doesn't change
The HACCP envelope. The fire-suppression standard. The code on grease-laden vapour interception. Ventless changes the route the air takes — it doesn't relax any safety requirement. Operators sometimes ask whether ventless is "compliant"; the right framing is: ventless is one kind of compliant solution, alongside ducted.
Where AirPure fits
Hemco's AirPure series sits at the high end of ventless: layered grease + particulate + activated carbon, with electrostatic stages where smoke profile demands it. Specified together with the cooking line — burners, induction, bakery — it lets us put a full kitchen into spaces that were previously impossible.
Talk to us about a layout that's been blocked by the duct path. There's a good chance the constraint isn't real anymore.