The Peace Lily: One Houseplant for Fresher Indoor Air

We spend almost all our lives indoors, surrounded by carpets, paint, furniture and electronic equipment that quietly release gases. This is where an often-overlooked ally comes in: the houseplant. Chosen carefully and positioned well, it can reduce unpleasant smells, absorb pollutants and even slightly lessen the impact of radiation from devices.

Why indoor air can be problematic in many homes

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

• Formaldehyde from chipboard, textiles and paint finishes
• Benzene from tobacco smoke and adhesives
• Ammonia from harsh cleaning products
• Volatile solvents from marker pens and paints

Such substances may trigger headaches, irritated eyes, coughing and tiredness. Dry air caused by central heating and air conditioning can make these effects worse.

“Houseplants do more than improve the look of a room: they act like small biological filters, drawing pollutants from indoor air day after day.”

The one plant that can do almost everything: the peace lily

If you want just one plant at home that addresses as many issues as possible, many indoor-environment experts turn to a classic: the peace lily (Spathiphyllum). It appears in almost every study of air-purifying plant 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 takes in a range of pollutants from paints, varnishes and furniture through its leaves.
• It releases considerable moisture into the air through its leaf surface.
• It copes well with low-light conditions, making it suitable for corners beside a sofa or desk.
• Its dense, glossy leaves provide an effective “filter surface”.

Over time, it reduces odours from cigarette smoke, stale air and mildly musty rooms by absorbing the associated substances and processing them through its metabolism. Combined with regular ventilation, this creates a noticeably fresher-feeling room.

The ideal place for a peace lily in your home

To achieve the greatest effect on odours and radiation, choose its position deliberately. Three areas are especially useful:

• 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 passage: where smells from the kitchen, bathroom and living room meet.

“The peace lily is ideally positioned one to two metres from the television or PC, away from direct heat from a radiator, in bright light but not strong sunshine.”

This allows the plant to soften both emissions from furniture and electronics and part of the electrical and magnetic exposure generated by devices. It does not completely shield these fields, but it can serve as a natural “barrier” between people and technology, which many users find subjectively more comfortable.

Other plants that reduce odours and pollutants

Anyone looking to enhance the effect can combine the peace lily with other species that are suited to particular substances.

For smoke, carpet adhesive and solvents

Robust classics are well suited to rooms where people used to smoke or where fitted carpets are present:

• English ivy: absorbs substances from tobacco smoke and adhesives.
• Snake plant (Sansevieria): hardy and low-water, it filters benzene and other gases.
• Dragon tree (Dracaena): takes in solvents released by paints and felt-tip pens.

Place these plants where smoke or fragrance compounds tend to gather: near the sofa, close to windows that were previously 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. Helpful options include:

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

If a room has been recently redecorated or contains a new cupboard, place one of these plants close to the new piece of furniture. Together with frequent rapid ventilation, this can help indoor air quality return to normal more quickly.

Radiation and office exposure: what plants can really do

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

• They trap fine dust and particles that collect around printers and electronic devices.
• They raise humidity levels, easing strain on the mucous membranes.
• They reduce stress and support concentration, as several occupational psychology studies have shown.

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

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

Plants with an especially broad range of benefits

Some species are genuine all-rounders that fit into almost any setting:

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

Distributing several of these all-rounders throughout different rooms improves indoor air more evenly, from the kitchen to the bedroom.

How to care for air-purifying plants properly

For plants to deliver their benefits, they need to stay healthy. Three factors matter most:

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

If leaves start to yellow or hang limply, use less water and check the location. Cold draughts and spots 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 spaces, such as those with mould or intense smoke contamination, plants alone are not enough.

Even so, many residents notice a clear difference: less dry eye discomfort, fewer headaches and a more pleasant atmosphere. In daily life, a 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 can be noticeable.

If you are unsure, begin with this one plant in the living room. Set it in a bright corner slightly away from the television and observe the next few weeks: less musty odour, air that feels a little softer, and a small but perceptible step towards a healthier home.