The Dutch safety research council has launched an investigation into carbon monoxide poisoning due to poorly installed or maintained central heating boilers, following reports that there are far more cases than thought.
A report by television programme Dit is de Dag Onderzoek found that central heating engineers make many mistakes installing central heating systems. Every year over 100 people are affected by carbon monoxide leaks and around 10 people die.
Although carbon monoxide used to be considered an issue with old fashioned water heaters, it is also a problem for more modern central heating systems, the researchers said.
Last year 83 people were taken to hospital with carbon monoxide poisoning due to a poorly installed central heating boiler, compared with 30 people who became ill because of an old-fashioned water heater.
In 2001, 1.7 million households had a simple gas water heater but that has now fallen to 550,000.
Since 2007, anyone has been able to set themselves up as a central heating engineer and there are no formal demands in terms of expertise and experience.
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