Formaldehyde at Home: Where It Hides, What It Does to Your Health and How to Eliminate It

What formaldehyde is and why it is dangerous

Formaldehyde (HCHO) is a volatile organic compound (VOC), colourless and with a pungent odour at high concentrations. It is classified by the International Agency for Research on Cancer (IARC) as a Group 1 carcinogen, that is, a substance for which there is sufficient evidence of carcinogenicity in humans.

Despite its dangers, formaldehyde is present in almost every modern home. It does not come from outside: we produce it ourselves, with the materials we choose to furnish, build and clean our homes.

The problem is that at low concentrations it is odourless and invisible. We do not see it, we do not smell it, but we breathe it in continuously, especially in poorly ventilated spaces.

What does formaldehyde smell like?

At high concentrations it has a pungent, irritating odour, similar to what you notice walking into a furniture showroom or a newly furnished room. At low concentrations, however, it is odourless: and that is exactly what makes it insidious, because you keep breathing it in without realising.

Where formaldehyde is found at home

The sources of formaldehyde in the home are many and often unsuspected:

Health effects: what formaldehyde causes

The effects depend on the concentration and the duration of exposure.

Short-term effects (acute exposure)

• Irritation of the eyes, nose and throat
• Watering eyes and a burning sensation
• Coughing, wheezing
• Headache and nausea
• Skin irritation and contact dermatitis

Long-term effects (chronic exposure)

• Chemical sensitisation: in some people, prolonged exposure may be associated with a growing sensitivity to formaldehyde and other VOCs, an aspect also discussed in relation to Multiple Chemical Sensitivity (MCS)
• Chronic respiratory conditions: asthma, chronic bronchitis, COPD
• Nasopharyngeal cancer and leukaemia: IARC classified formaldehyde as a Group 1 carcinogen on the basis of evidence of nasopharyngeal cancer in occupationally exposed workers

The most vulnerable groups are children (who breathe more air relative to body weight), the elderly, people with asthma or allergies and those with MCS.

How to reduce formaldehyde at home: practical measures

Eliminating it completely is impossible, but there are concrete measures to reduce its concentration:

• Choose E0 or E1 certified furniture: European regulations classify wood panels by their formaldehyde emissions. E0 products have very low emissions.
• Ventilate often: ventilation is the most immediate way to dilute formaldehyde. Open the windows for at least 15-20 minutes a day, especially in rooms with new furniture.
• Avoid heat exposure: heat accelerates release from materials. Avoid overheating rooms with new furniture.
• Choose formaldehyde-free cleaning products: read the labels and avoid formaldehyde releasers (DMDM hydantoin, quaternium-15, imidazolidinyl urea).
• Active air purification: the most effective measure to continuously reduce concentrations in the air.

Why you need activated carbon and zeolite (and why not all of them work)

Formaldehyde is a gaseous molecule. This means that a HEPA filter, however effective on particles, cannot capture it: formaldehyde passes through the HEPA without being intercepted.

To capture it you need activated carbon, which works by adsorption: the gaseous molecules bind to the porous surface of the carbon and are removed from the air. But the quantity makes all the difference:

• A filter with a few hundred grams of carbon, as in many common purifiers, saturates much sooner when there is a continuous formaldehyde source
• A filter with kilograms of activated carbon, such as the up to 6.8 kg in standard Austin Air models, offers a much higher adsorption capacity and a much longer life

The type of carbon and the way air passes through it matter too. In Austin Air purifiers the activated carbon is coconut shell carbon, rich in micropores, well suited to trapping VOCs at the low concentrations typical of indoor air. Thanks to the 360° intake, air passes slowly through the layer of carbon surrounding the HEPA, with a longer contact time that favours adsorption.

Moreover, for formaldehyde ordinary activated carbon has limited efficiency. That is why Austin Air also uses potassium iodide-impregnated carbon, which according to the manufacturer is more effective on formaldehyde and other harsh chemical gases.

The solution: Austin Air HealthMate Plus® and Immunity Machine®

Austin Air offers two models particularly suited to those with high needs for reducing VOCs and formaldehyde:

Austin Air HealthMate Plus®: for VOCs and formaldehyde

The HealthMate Plus® contains up to 6.8 kg of a blend of activated carbons and zeolite, including impregnated carbon formulated to capture polar VOCs such as formaldehyde more efficiently than standard carbon. Austin Air indicates it as the best choice for chemical gases, formaldehyde included: it is the model for those living with new furniture, laminate flooring, recent paint or household chemicals.

Austin Air Immunity Machine®: maximum performance

The Immunity Machine® contains the same potassium iodide-impregnated carbon as the Plus, which Austin Air recommends for VOCs and formaldehyde, and adds mineral-based filtration, a mineral with a proprietary impregnation and the HEGA cloth: it is the choice for those who want the most complete protection. Its 8-phase filtration adsorbs odors, VOCs, formaldehyde, ammonia, nitrogen dioxide and other gases, and is completed by the HEGA filter (High Efficiency Gas Adsorption), a military-grade carbon cloth developed by the British Armed Forces in the 1970s as protection against chemical agents and gases.

Features common to both models

• Medical-grade HEPA, 5.6 m², for the particulate associated with VOCs
• High-temperature powder-coated steel housing and unpainted motor
• Few plastic parts (fan blade, casters and control knob), to minimise materials that can release substances
• 3-year warranty for consumers on mechanical and electrical components, managed in Italy by High-Tech Market
• Individually tested in Italy before delivery

Conclusion: the air at home is not as harmless as it seems

Formaldehyde is one of those pollutants we do not see or smell, but that we breathe every day in our homes. The sources are everywhere, from furniture to paint, from cleaning products to textiles. And its health effects, under chronic exposure, are documented and serious.

The good news is that concrete solutions exist. Ventilation helps, choosing materials helps, and active air purification with a system high in activated carbon makes it possible to continuously reduce formaldehyde concentrations in the spaces where we live, even when the sources cannot be eliminated.

Discover the Austin Air HealthMate Plus® and the Immunity Machine® on high-techmarket.it, authorized Austin Air importer for Italy.