WHAT IS SCENT MARKETING

Scent marketing, defined more carefully

Scent marketing (also called ambient scenting, scent branding, or commercial scenting) is the practice of introducing a chosen fragrance into a business environment on purpose, at a controlled intensity, so that the smell of the space supports what the business is trying to communicate. A hotel lobby that smells faintly of white tea every time a guest walks in, a leasing office whose model unit smells clean and warm, a gaming floor where the air reads fresh rather than stale: those are all scent marketing programs, whether or not anyone calls them that.

It is worth separating three things that often get lumped together. Air freshening is a consumer product category such as plug-ins, sprays, and gels that simply add a smell to a room. Odor control is designed to address unwanted malodor in spaces such as trash rooms, locker rooms, pet areas, or smoke-prone environments. Our odor-control formulations combine odor-neutralizing technology with fragrance. Scent marketing is the intentional use of fragrance to shape the atmosphere of a space, with the fragrance, delivery method, placement, and intensity selected for the environment and managed over time.

How it works

Smell is processed differently from what people see or hear. Olfactory signals reach the parts of the brain associated with emotion and memory with less conscious filtering, which is why a smell can change how a room feels before anyone has formed an opinion about it. In one four-month field experiment on a working railway, only about 27% of passengers consciously recognized that the coaches were scented, yet ratings of service quality, experience, and value all improved and held for the duration of the study (Girard et al., 2019).

The most useful finding for anyone planning a program is that ambient scent works more on judgment than on mood. A 2020 meta-analysis of 671 effects from ambient-scent experiments found the effect is "more cognitive than affective": pleasant scent nudges how people evaluate a space, a service, or a product more reliably than it changes how happy they report feeling (Roschk & Hosseinpour, 2020). That is a practical distinction. It means the goal is not to make people feel a certain way; it is to make the space read as cleaner, more considered, and more consistent with the brand.

How commercial scenting works in a real building

The fragrance is only part of the system. In practice a commercial program has four parts, and most of the work is in the last three.

1. Fragrance selection. The scent has to fit the brand, the room, and the people in it. A funeral home, a fitness club, and a casino floor do not want the same thing. Most programs work from a commercial fragrance library and narrow to two or three candidates before anything is installed. Our guide to choosing the right fragrance covers the trade-offs.
2. Delivery. The fragrance has to reach the room evenly. That is an airflow problem, not a bottle problem. HVAC-integrated systems introduce fragrance into the supply air and cover large or connected spaces; direct-area diffusers cover a single room or zone. Which one fits depends on the building, and the answer is often both. The comparison in HVAC vs. direct-area scenting is the most detailed thing we publish on this.
3. Intensity and tuning. Intensity has an optimum, not a more-is-better curve. The 2020 meta-analysis reports nonlinear effects of perceived concentration, and a supermarket field study found that only the right intensity level moved time in store and sales; lower levels did nothing measurable (Leenders, Smidts & El Haji, 2016). The job is to find the level, then hold it as seasons, occupancy, and HVAC schedules change.
4. Ongoing service. Equipment needs refills and checks. Fragrance may need to change with the season or as the business changes. A program that is installed and forgotten drifts within months. This is why we treat scenting as a serviced program rather than a product purchase; see how it works for the full process.See our guide to comparing scent marketing companies.

Types of commercial scent systems

Direct-area (standalone) diffusion. Freestanding or wall-mounted units that scent one room or a zone independently. They are our most popular solution and the answer for leased suites, treatment rooms, model units, fitting rooms, and any space where the HVAC serves areas that should not be scented or where HVAC use is impractical. They also make zoning possible: a different fragrance, or none, in different parts of the same property.

HVAC-integrated diffusion. A cold-air diffusion unit connects to the building's air handler and distributes fragrance through the ductwork. It is the right tool for large single-zone spaces such as gaming floors, and for connected spaces such as lobbies, corridors, and amenity floors. It inherits the air handler's schedule, so when the HVAC cycles down, so does the scent; that is a design constraint to plan around, not a flaw.

Hybrid programs. Many multi-room properties end up with HVAC delivery for the large circulation spaces and direct-area units for specific rooms. This is something we'll explore with you on our call. Click to talk with an expert

What is not on this list: consumer plug-ins, reed diffusers, and aerosol dispensers. They can make a small room smell pleasant for a while, but they do not deliver luxury experiences or consistent coverage, they cannot be tuned, and they are often not replaced timely because they're at the bottom of your to-do list. The difference is covered in commercial fragrance vs. a janitorial add-on.

What the research shows, and what it does not show

The evidence for ambient scent is real.

• The largest synthesis to date integrated 671 effects and found that pleasant ambient scent "on average produces a substantial increase in the level of customer responses (3%–15%)." Its spending estimates, 3% for an average condition and 23% for a most favorable one, are modelled figures, not observed sales. Congruency between the scent and the setting, a scent that reads as one clear idea, and service settings (as opposed to goods retail) were all associated with larger effects. Roschk & Hosseinpour, 2020, Journal of Marketing.
• A four-month field experiment on a working railway, with fragrance delivered through the trains' existing air-conditioning, found improved ratings of service quality, experience, and value that persisted through the study and had not significantly declined two weeks after the scent was removed. The samples were modest (204 passengers; 35 completed all nine waves), and a train is not a lobby. Girard et al., 2019, Journal of Service Research.
• A systematic review of twenty studies run in real retail stores found that most report positive effects on emotional states, while evidence for behavioral effects is inconsistent. The review also notes that most studies did not report scent intensity, and only three of twenty specified the equipment used or where it was placed, which are exactly the variables that determine whether a program works. Giacalone, Pierański & Borusiak, 2021, Applied Sciences.
• A randomized trial in a small independent bookstore and café found no significant effect of a chocolate scent on sales over 31 days. The store was 800 square feet with about 21 customers a day, and the authors flag low statistical power; it is an honest null, not proof that scent does nothing. McGrath, Aronow & Shotwell, 2016, SpringerPlus.
• In an 18-day field study in a home-decoration store, a simple orange scent increased average spend while a more complex blend performed no better than no scent at all. The mechanism the authors identify is processing fluency: a scent that reads as one clear idea is easier to process. Herrmann, Zidansek, Sprott & Spangenberg, 2013, Journal of Retailing, 89(1), 30–43.

Taken together: scent reliably changes how a space is evaluated; it sometimes changes behavior; the size of the effect depends on fit, intensity, and delivery, which the published studies mostly fail to report. That is the evidence-based case for testing in your own building rather than trusting a percentage from a brochure. Every program we install starts with a free 7-day on-site trial for that reason.

Where scent marketing is used

Any business where people spend time in a space they did not build themselves is a candidate. The verticals we work in most, and what the program is usually solving for in each:

• Apartment and multifamily scenting: leasing offices, model units, lobbies, and corridors, with pet and trash-area odor control underneath.
• Casino scent marketing: coverage and airflow at scale on the gaming floor, smoke odor control, and the signature guests associate with the property.
• Senior living and memory care scenting: restrained intensity, sensitivity-aware fragrance, and the everyday odor control communities actually need.
• Gym and fitness scenting: locker-room and high-humidity odor first, then a member experience built zone by zone.
• Funeral home scenting: subtle fragrance for chapels, arrangement offices, and visitation rooms, with odor-control formulations for preparation areas that combine neutralizing technology with a fragrance selected for the space.
• Commercial property scenting: a consistent signature across lobbies and amenity floors, tuned to building class and tenant profile.
• Hotel scenting: one recognizable signature from the lobby through corridors, spa, and event space.
• Retail store scenting: one scent, consistent from storefront to fitting room to checkout, across every location.
• Healthcare and dental office scenting: calm waiting rooms and treatment areas, with restraint as the design principle.
• Commercial odor control: when unwanted odor is the problem, start by identifying and addressing the source. Where treatment is needed, our odor-control program combines odor-neutralizing technology with fragrance.