Can the Air in Your Home Affect How You Feel? The Science of Plant Scents
Can the air we breathe influence how we experience our homes? Explore the science of plant volatiles, indoor air quality, and olfactory perception, and discover thoughtful ways to create a more comfortable sensory environment.
Have you ever walked through a pine forest or entered a garden after rainfall and immediately noticed how different the air seemed?
Perhaps the scent reminded you of childhood.
Perhaps it made the environment feel calmer.
Or perhaps you simply became more aware of your surroundings.
These experiences illustrate something fascinating about the relationship between humans and their environments:
Air is not only something we breathe. It is also part of the sensory experience of a place.
When we think about healthy residential design, we often focus on what we can see and touch—the arrangement of furniture, colors, materials, daylight, and vegetation.
But there is another dimension that is much harder to see:
the chemical and sensory composition of indoor air.
Buildings contain a mixture of substances originating from construction materials, cleaning products, furnishings, cooking, occupants, outdoor air, and biological sources.
Plants also release volatile organic compounds, including substances commonly described as biogenic volatile organic compounds (BVOCs).
Some of these compounds contribute to the characteristic aromas associated with forests, herbs, flowers, and other vegetation.
This creates an intriguing question:
Could the chemical character of natural environments contribute to the way we experience them?
Research suggests that the answer may be possible—but the science is considerably more nuanced than the popular idea of a "natural pharmacy" inside the home.
The Biology of Plant Volatiles
Plants continuously interact with their environment.
They release a variety of volatile compounds that participate in communication, defense, reproduction, and interactions with other organisms.
Among the compounds associated with forest environments are substances such as α-pinene, limonene, and 1,8-cineole.
Some of these substances have been studied within the broader field of research surrounding phytoncides and forest-derived volatile compounds.
Research into forest environments has investigated whether exposure to these plant-derived compounds may contribute to physiological and psychological responses observed during forest-based activities.
Reviews of forest bathing research have reported associations between exposure to natural environments and changes in stress-related physiological markers. However, researchers also emphasize substantial variation between studies and the difficulty of separating the effects of individual compounds from the many other characteristics of a natural environment.
This distinction matters.
A forest is not simply a room filled with plant chemicals.
It also contains:
- natural light;
- vegetation;
- visual complexity;
- natural sounds;
- fresh air;
- movement;
- temperature variation;
- and opportunities to disconnect from urban environments.
Therefore, we should be careful not to attribute the entire psychological experience of nature to one chemical compound.
The Olfactory Connection
Smell has a particularly interesting relationship with memory and emotion.
Olfactory processing is closely connected with brain regions involved in emotion and memory. This helps explain why a familiar smell can sometimes evoke a vivid personal memory or change how we perceive a particular environment.
The smell of rain.
Freshly cut grass.
A particular type of wood.
A favorite herb.
A childhood home.
A forest.
The connection between smell, memory, and emotion is therefore scientifically interesting without requiring us to describe aromas as an automatic neurological treatment.
Olfactory Associations: When a Scent Becomes Associated With a Place
There is also a psychological dimension to the way we experience familiar scents.
Imagine that you repeatedly encounter the same pleasant aroma while reading, relaxing, or spending quiet time at home.
Over time, that smell may become associated with the context in which it repeatedly occurs.
Later, encountering the same aroma may remind you of that environment.
This is better understood as associative learning and memory than as an automatic "switch" that tells the nervous system to eliminate anxiety.
The distinction is important.
A pleasant scent may contribute to a person's perception of comfort, but individual responses vary considerably.
One person's relaxing aroma may be another person's unpleasant smell.
This is why sensory design should emphasize personal preference and environmental suitability.
Plants and Indoor Air Quality: A Necessary Distinction
Indoor plants can be beautiful and can contribute to the visual and experiential qualities of a home.
They may also participate in certain biological interactions with indoor air.
Laboratory studies have demonstrated that plants can remove some volatile compounds under controlled conditions. However, translating those results to ordinary homes is much more complicated.
The U.S. Environmental Protection Agency states that there is currently no evidence that a reasonable number of houseplants remove significant quantities of pollutants in homes and offices. Therefore, plants should not be treated as a substitute for proper ventilation or other strategies for maintaining indoor air quality.
This leads to an important architectural principle:
Plants are not a substitute for adequate ventilation.
If indoor air quality is poor, the priority should be to identify and reduce pollution sources and provide appropriate ventilation or filtration.
Plants can still have an important role in biophilic design and sensory experience.
Their value simply should not be overstated as an air-cleaning technology.
Designing an Inhalable Home
If the goal is to create a more pleasant sensory environment, the safest approach is not to attempt to transform your home into a laboratory of concentrated plant chemicals.
Instead, think about the entire environmental system.
1. Introduce Living Plants
Plants can add visual complexity, natural forms, texture, and subtle natural aromas.
Consider species appropriate for your climate, available daylight, and indoor conditions.
The objective is not to create a specific chemical concentration.
It is to introduce living elements into the environment in a way that supports the overall sensory quality of the space.
2. Prioritize Ventilation
Fresh outdoor air is one of the fundamental components of good indoor air quality.
Regular ventilation can help reduce concentrations of pollutants generated indoors, depending on outdoor conditions and the building's ventilation system.
If your home has persistent odors, excessive humidity, smoke, or other indoor-air problems, address the source rather than attempting to cover it with fragrance.
Masking an odor is not the same as removing its source.
The EPA identifies source control and adequate ventilation as fundamental strategies for improving indoor air quality, with filtration serving as an additional measure when appropriate.
3. Be Thoughtful About Fragrance
If you enjoy natural scents, you can incorporate them as part of the sensory identity of a room.
However, stronger is not necessarily better.
A pleasant environment does not require an intense fragrance.
Individual sensitivity varies, and some people may experience discomfort from certain fragrances or airborne substances.
The goal should therefore be:
subtle sensory enrichment rather than chemical saturation.
The Sensory Architecture of Air
Architecture is often described through visible elements.
Walls.
Windows.
Floors.
Ceilings.
Furniture.
But the experience of a building is multisensory.
We hear the room.
We feel its temperature.
We notice its humidity.
We see its daylight.
And we breathe its air.
This means that indoor environmental design should consider not only visual aesthetics but also the sensory conditions created by ventilation, materials, odors, humidity, temperature, and biological elements.
The concept of an inhalable home is therefore less about filling a room with plant chemicals and more about recognizing that air itself is part of architectural experience.
Nature Is More Than a Fragrance
One of the most important lessons from research into forest environments is that nature should not be reduced to a single variable.
A forest is a complex multisensory environment.
The visual pattern of leaves.
The sound of wind.
The smell of vegetation.
The changing quality of daylight.
The movement of the body.
The temperature.
The perception of space.
All of these factors interact.
Research examining forest bathing suggests that exposure to natural environments may be associated with changes in stress-related physiological and psychological measures. However, the relative contribution of volatile compounds, sensory stimulation, physical activity, and psychological context remains an important area of research.
This suggests an important principle for biophilic architecture:
We do not necessarily need to reproduce one chemical component of nature.
We can instead recreate some of the multisensory qualities of natural environments.
Creating a More Comfortable Sensory Environment
A healthy sensory environment does not need to smell strongly of eucalyptus, lavender, or pine.
Instead, consider:
- adequate ventilation;
- low-emission materials where practical;
- appropriate humidity control;
- natural daylight;
- living plants;
- natural materials;
- pleasant but subtle aromas;
- reduced sources of unpleasant odors;
- and personal control over the sensory environment.
These strategies address the home as a complete environmental system.
The Invisible Architecture of the Home
We normally experience architecture visually.
But some of its most important characteristics remain invisible.
Airflow.
Humidity.
Temperature.
Odors.
Volatile compounds.
Acoustic conditions.
These invisible environmental variables form part of the experience of a building.
The challenge for contemporary architecture is therefore not simply to create beautiful spaces.
It is to create environments that are sensory-aware.
The inhalable home is not a house that functions like a pharmacy.
It is a home in which the quality of the air, the presence of natural elements, and the human sense of smell are considered as legitimate parts of environmental experience.
Final Reflection
The next time you enter a forest, garden, or naturally ventilated room, pay attention to something you normally ignore:
the air.
What does it smell like?
How does the temperature feel?
Is the air still or moving?
Can you detect natural aromas?
Does the environment feel fresh?
These observations can reveal how deeply architecture and environmental conditions interact with our senses.
Science does not require us to turn every natural experience into a medical intervention.
Sometimes it simply invites us to pay closer attention.
And perhaps that is one of the most valuable principles of holistic environmental design:
A healthier relationship with our surroundings begins with noticing them.
Let's Connect!
Do certain natural scents make you feel more comfortable at home?
Do you prefer the smell of wood, herbs, flowers, rain, or simply fresh air?
And how important is natural ventilation in your own living environment?
Share your thoughts in the comments below.
Disclaimer
The information presented in this article is intended for general educational and informational purposes only.
It is not medical advice and does not establish that exposure to a particular plant, aroma, volatile compound, or indoor-air condition will produce a specific psychological or physiological effect.
Individual responses to scents and indoor environments vary considerably.
Concentrated fragrances and aromatic substances may cause irritation or discomfort in sensitive individuals.
Indoor air quality should be addressed primarily through source control, appropriate ventilation, and other evidence-based environmental measures rather than relying on plants or fragrances as substitutes for these measures.
If you have persistent respiratory symptoms, allergies, or other health concerns related to your indoor environment, consult an appropriately qualified healthcare professional.
References
- Antonelli, M., Donelli, D., Barbieri, G., Valussi, M., Maggini, V., & Firenzuoli, F. (2020). Forest Volatile Organic Compounds and Their Effects on Human Health: A State-of-the-Art Review. International Journal of Environmental Research and Public Health, 17(18), 6506. DOI
- Hansen, M. M., Jones, R., & Tocchini, K. (2017). Shinrin-Yoku (Forest Bathing) and Nature Therapy: A State-of-the-Art Review. International Journal of Environmental Research and Public Health, 14(8), 851. DOI
- Bandyopadhyay, A., Shah, S., & Roviello, G. N. (2026). Forest Bathing (Shinrin-yoku) and Preventive Medicine: Immune Modulation, Stress Regulation, Neurocognitive Resilience, and Neurological Health. Medical Sciences, 14(1), 95. DOI
- U.S. Environmental Protection Agency (EPA). Improving Indoor Air Quality. U.S. EPA. Official EPA page
- U.S. Environmental Protection Agency (EPA). The Inside Story: A Guide to Indoor Air Quality. U.S. EPA. Official EPA guide
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