Back to all product categories

Commercial HVAC

Air Handling Units

AHUs are part of the HRS offer for larger ducted and ventilation-led jobs. They matter where airflow discipline, filtration, fresh-air treatment, and quieter zone-level delivery are more important than simply hanging indoor units on walls.

HospitalsCommercial buildingsLarge officesRetail floorsVentilation-led fit-outs

Brands in this category

VTS
Citizen

Reference model in this category

VENTUS Modular AHU

VTS

VTS VENTUS is a modular AHU route for serious airside projects where airflow, filtration, fresh air, and functional module selection need to be engineered rather than improvised on site.

Why this route may fit you

  • VTS positions VENTUS as modular AHUs where internal components can be combined in different configurations depending on the building need.
  • The VENTUS modular range is listed with 1,100 to 100,000 m3/h airflow, giving it a broad commercial specification window.
  • Floor-mounted and ceiling-suspended versions help match AHU selection to real ceiling, plant-room, and service-access constraints.

Where it usually fits best

  • Projects where chilled or conditioned air needs to be distributed through a duct network rather than direct room units.
  • Sites where filtration, fresh-air handling, and zone airflow control are part of the brief.
  • Commercial jobs where the buyer needs engineered airside equipment instead of a cosmetic AC upgrade.
Open manufacturer source

Alternatives

Other models worth comparing in this category.

Citizen

Standard, Smart, Custom and Treated Fresh Air AHUs

Citizen, a Daikin group company, fits projects that need DX or chilled-water AHUs, treated fresh air, filtration choices, or custom combinations of airflow, static pressure, and control requirements.

Citizen Industries AHU Range

Citizen

Ventilation / Exhaust Units

Useful when the airside requirement is more about exhaust, smell, smoke, fumes, low noise, and easy maintenance than a standard cooling-only AHU.

Citizen Ventilation / Exhaust Units

Questions you may have

Popular questions about air handling units.

Does HRS really offer AHUs or only smaller AC systems?
Yes. AHUs are part of the HRS commercial HVAC and ducting scope where the job needs proper airside engineering, not just room-unit cooling.
When does an AHU make more sense than cassette or ductable split systems?
When the project needs stronger airflow control, filtration, fresh-air handling, zoning discipline, or integration into a larger ducted mechanical system.
How is buying an AHU different from buying a room AC?
AHUs belong in engineered commercial jobs. The main decision is about system design, ducting, filtration, and operating context rather than a simple unit-for-unit purchase.
Can an AHU run from our VRF system instead of a chiller?
Yes, through an expansion-valve kit that connects the AHU coil to the VRF outdoor unit on liquid and gas lines. Two conditions decide whether it is a sound idea. The manufacturer keeps a list of AHUs it will approve for that connection, and warranty across the kit, the VRF, and the AHU depends on staying on it. Beyond that, an AHU coil should normally sit on its own refrigerant circuit, because its appetite is much larger than the ordinary indoor units it would otherwise share a loop with and it can starve them. Where a shared circuit is unavoidable, both the combined ratio and the AHU's share of it are capped tightly, and a large AHU load is often better split across more than one kit for finer capacity control.
What is the difference between an AHU, a treated fresh air unit, and an energy recovery ventilator?
An AHU conditions and distributes air, usually a mix of return air and some fresh air. A treated fresh air unit, or TFA, handles outdoor air specifically, taking Kerala's humidity out of it before it reaches the space so the room units are not left fighting that latent load. An energy recovery ventilator, or ERV, exchanges heat between the incoming and outgoing air streams while keeping the two separate, so the building gets its air changes without importing the full outdoor heat and moisture load. Hospitals and other buildings with high air-change requirements are where the ERV case is usually strongest.