Dutch authorities on Saturday recalled 186,400 VeldAir M4 air purifiers after tests found that their filter frames can warp during prolonged use, letting smoke-laden air pass around the filter. The warning comes as fires across the Netherlands, Belgium and western Germany send smoke towards the densely populated Benelux corridor.
The units were sold from February 2024 and promoted for protection against wildfire smoke. About 142,000 went to Dutch buyers, including 43 municipal clean-air rooms set up in libraries and sports halls. The national product-safety inspectorate said users should switch the machines off and check the serial number against its recall notice.
Smoke season outpaces forecasts
Satellite analysis by the North Sea Atmospheric Institute counted 84,000 hectares burned in the lowland fire belt since July, more than twice the 20-year average for the period. Researchers estimate that about a quarter of the area was peat or heath, where fires can smoulder below ground and resume after surface flames disappear.
The institute’s latest model gives a 40% chance that Rotterdam, Amsterdam, Antwerp and nearby towns will record at least eight days with fine-particle pollution above 25 micrograms per cubic metre before 15 October. Its upper-range scenario puts pollution above that level on 16 days and projects another 60,000 hectares could burn if rain misses the region. The World Health Organization’s recommended 24-hour limit is 15 micrograms.
“The central forecast is not an evacuation scenario, but the upper range is serious enough that cities should prepare for repeated indoor-air warnings,” said Lantar Maryati, an atmospheric scientist at the institute. She said winds could carry smoke from fires hundreds of kilometres away, making local fire counts a poor guide to city air quality.
Recall complicates shelter plans
The recalled purifier’s plastic frame can deform after about 90 minutes on its highest setting, according to tests commissioned by the inspectorate. In those conditions, the filter captured as little as 18% of test particles, far below the 99% advertised for the unit. The inspectorate said the defect did not mean every machine would fail, but advised consumers not to rely on it during smoke alerts.
Rotterdam emergency coordinator Gavin G. Hunt said the city had no evidence of an immediate threat to life and was not preparing to move residents. “People should keep windows closed when smoke is thick, follow the air-quality alerts and avoid strenuous outdoor activity,” he said. Maryati cautioned that closed windows alone may not keep fine particles out of older buildings.
City officials are considering opening additional public rooms with verified filtration, suspending outdoor sport and closing wooded parks when smoke levels rise. The recalled machines were installed in several rooms in the Kadezicht Quarter, a former dockside district renewed with housing and public facilities. The city said those rooms would not be advertised as clean-air shelters until replacement equipment was tested.
Siga Margarita, who bought a VeldAir unit for her flat in Dordrecht, said she had used it during two smoky evenings this month. “The display showed clean air, so I thought we were covered,” she said. The company has offered refunds or replacement filters, but the inspectorate says a filter change will not fix the frame fault.
The Dutch government’s emergency team is due to review the forecast on Monday, with neighbouring authorities invited to share smoke measurements and equipment stocks. The institute says a shift in wind or a sustained period of rain could quickly lower the risk. Without either, it expects recurring pollution alerts into October, even if the fires remain far from the largest cities.
