Key points
HVAC integration
Connects to AHUs, FCUs or ducts. Invisible, even coverage for large spaces.
Standalone units
Self-contained diffusers placed in the space. Flexible and quick to install.
Most buildings use both
HVAC for large shared spaces, standalone for separately ventilated zones.
Choosing the right delivery for each space
There are two ways to deliver fine fragrance in a commercial building. HVAC integration connects a diffuser to the building’s air system, so fragrance travels with the supply air. Standalone diffusers are self-contained units placed in the space, releasing fragrance directly into the room.
Neither is better in every case. The right choice depends on the size of the space, how it is ventilated, and how visible the equipment can be.
The single corner diffuser problem
The most common mistake is one large standalone unit in the corner of a big lobby. It cannot reach the far side, so the scent is overpowering near the unit and faint elsewhere. Even coverage needs either HVAC integration or several correctly sized units.
When HVAC integration is best
Choose HVAC integration when: Applied through HVAC and ACMV scent systems.
The space is large, tall or open-plan
Equipment must be invisible front of house
One air system serves the whole area
Consistent coverage across several zones is needed
When standalone units are best
Standalone diffusers suit these situations.
Separate ventilation
Rooms on their own fan coil or split units, such as meeting rooms.
No access to the air system
Where integration is impractical or not permitted.
Targeted zones
Lift lobbies, receptions and small spaces that need their own intensity.
Frequently asked questions
1. Which is more expensive?
It depends on the building. HVAC integration involves more engineering; standalone units may be needed in greater numbers. We recommend the mix after a site assessment.
2. Does HVAC scenting work with Singapore ACMV systems?
Yes. Diffusers connect to AHUs, FCUs or ductwork as the layout allows.
3. Can we start with standalone and add HVAC later?
Yes. Programmes can be extended as needs change.
4. Will HVAC scenting reach every floor?
Only the zones served by the connected air handling units. We map this during the survey.
5. Are standalone units visible?
They are designed to be discreet and placed with care, but they are visible. HVAC integration is invisible.
6. Who maintains both types?
Equal Strategy’s technicians. A client never touches a diffuser.
Get started
Get the right mix for your building
Request a site assessment and we will recommend HVAC, standalone or both for each zone.