Peace Lily: The One Houseplant for Cleaner Indoor Air

We spend almost our entire lives indoors, where carpets, paints, furniture and electronics quietly release gases. This is precisely where an often underestimated ally comes in: the houseplant. Chosen well and positioned intelligently, it can reduce unpleasant odours, absorb pollutants and even slightly soften exposure to radiation from devices.

Why the air in many homes can be problematic

Living rooms, offices and bedrooms contain invisible substances released by building materials, varnishes, adhesives, cleaning products and smoke. These include:

• Formaldehyde from chipboard, textiles and paintwork
• Benzene from tobacco smoke and adhesives
• Ammonia from harsh cleaning products
• Volatile solvents from markers and paints

These substances may cause headaches, irritated eyes, a cough reflex and tiredness. Dry air caused by central heating and air conditioning can make the issue worse.

“Houseplants do more than improve the appearance of a room; they act like small biological filters that draw pollutants from indoor air day after day.”

The one plant that can do almost everything

If you want to bring home just one plant that tackles as many issues as possible at once, many indoor-environment experts turn to a classic: the peace lily (Spathiphyllum). This plant appears in almost every study of air-purifying species.

What makes the peace lily so special

The peace lily combines several qualities that make it particularly appealing for a living room or home office:

• It absorbs various pollutants from paints, varnishes and furniture through its leaves.
• It releases a great deal of moisture into the air via its leaf surface.
• It copes with low light levels, making it ideal for corners beside the sofa or desk.
• Its dense, glossy leaves provide an effective “filter surface”.

It gradually reduces odours from cigarette smoke, stale air and slightly musty rooms by taking in the associated substances and processing them through its metabolism. Combined with regular ventilation, this creates a noticeably fresher feel indoors.

The ideal place for a peace lily at home

To achieve the greatest effect on odours and radiation, a carefully selected position is worthwhile. Three areas are particularly suitable:

• Living room focal point: beside the sofa or television, where people spend most of their time.
• Home-office area: between the desk and screen, or slightly to one side of the monitor.
• Hallway or passageway: where odours from the kitchen, bathroom and living room meet.

“The peace lily is best placed one to two metres from the television or PC, away from radiators, in bright but not intense sunlight.”

In this way, the plant can soften both emissions from furniture and electronics and some of the electrical and magnetic exposure created by devices. It does not shield these fields completely, but acts as a natural “barrier” between people and technology, which many users subjectively find more pleasant.

Other plants that reduce odours and pollutants

Anyone wishing to strengthen this effect can pair the peace lily with other species that are suited to particular substances.

Against smoke, carpet adhesive and solvents

For rooms where smoking previously took place or which have fitted carpets, these hardy classics are suitable:

• Ivy: absorbs substances from tobacco smoke and adhesives.
• Snake plant (Sansevieria): tolerant and low-maintenance, requiring little water while filtering benzene and other gases.
• Dragon tree (Dracaena): takes up solvents from paints and felt-tip pens.

They are best positioned where smoke or scents tend to gather: near the sofa, close to windows that were formerly used for airing the room, or in corners with little air movement.

Reducing formaldehyde from furniture and textiles

New kitchens, cupboards and carpets can release small quantities of formaldehyde for months. The following plants can help:

• Kentia palm: its large leaf surface makes it ideal for a living room or bedroom.
• Weeping fig (Ficus benjamina): a compact tree for bright corners in the living room.

If a room has just been redecorated or contains a new cupboard, place one of these plants close to the new item of furniture. Together with frequent burst ventilation, indoor air quality returns to normal more quickly.

Radiation and office exposure: what plants can really do

Computers, routers and screens produce electrical and magnetic fields. Houseplants cannot physically “switch off” these fields, but they can noticeably change the working environment:

• They capture fine dust and particles that collect around printers and electronic equipment.
• They improve humidity levels, easing discomfort in the mucous membranes.
• They lower stress levels and support concentration, as shown by several occupational psychology studies.

“A small cactus right beside the monitor and a larger leafy plant behind you create a noticeably more pleasant indoor climate in a home office.”

A combination is especially worthwhile in an office: place a cactus or succulent directly on the desk, then position a larger philodendron or devil’s ivy (Pothos) slightly further away to absorb solvents from markers, toner and varnishes.

Plants with an especially broad range of benefits

Some species are genuine all-rounders that fit almost anywhere:

• Umbrella plant (Schefflera): filters a range of pollutants and is easy to care for.
• Peace lily: absorbs gases, raises humidity and reduces odour issues.

Distributing several of these all-round plants across different rooms improves indoor air consistently, from the kitchen to the bedroom.

How to care for air-purifying plants properly

For plants to deliver their benefits, they must remain healthy. Three factors matter most:

• Keep leaves clean: regularly wipe dust away with a slightly damp cloth; otherwise, the pores become blocked.
• Water correctly: it is better to water slightly too little than to leave plants permanently wet, as waterlogging quickly leads to root rot.
• Consider the light: provide bright conditions without direct midday sun, especially for peace lilies and ficus plants.

If leaves begin to turn yellow or droop softly, reduce the amount of water and check the location. Cold draughts and positions close to radiators are unsuitable.

What plants can - and cannot - do

Houseplants are not a replacement for an air purifier or ventilation; they complement both. They reduce exposure, capture some odours and pollutants, and improve the perceived air quality. In heavily affected rooms, such as those with mould or intense smoke exposure, they are not enough on their own.

Even so, many residents notice a clear difference: less dry eye discomfort, fewer headaches and a more pleasant atmosphere. In everyday life, the combination of one large peace lily in the living room, one or two smaller plants in the work area, and a green accent in the hallway is particularly noticeable.

If you are unsure, start with this one plant in the living room: place it in a bright corner slightly away from the television, then observe the following weeks. Less musty odour, slightly softer air and a small yet perceptible step towards a healthier home.