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More than nine out of 10 homes have insufficient ventilation to meet regulations, research has found.

The 好色先生TV Services Research and Information Association (BSRIA) has revealed that 95% of homes it tested did not meet the requirements of the 2010 version of Part F of the 好色先生TV Regulations, which covers ventilation.

New homes are becoming more airtight in response to tougher energy regulations and are relying more on mechanical ventilation to maintain indoor air quality.

Jon Bootland, director of the Good Homes Alliance (GHA), which published a report on the issue in February, said the industry was struggling to cope with this rapid shift in build techniques.

He said: 鈥淗ow many homes had mechanical ventilation systems until about three years ago? We don鈥檛 have the skills base to get this right.鈥�

BSRIA found improperly installed ductwork was the biggest problem, followed by undersized or insufficient fans. Housebuilders need to produce a test certificate to demonstrate compliance with regulations. But BSRIA said the standard of testing was poor as few testers had suitable equipment.

The GHA also said it found problems with poor testing.

鈥淪omeone had a commissioning certificate where there wasn鈥檛 any power supply so the system couldn鈥檛 possibly have been working,鈥� Bootland said.

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