Scientists have said there is no evidence to suggest a link between the use of wi-fi and damage to health.
BBC programme Panorama found that radiation levels from wi-fi in one school was up to three times the level of mobile phone mast radiation.
The readings were 600 times below the government's safety limits but there is ongoing debate about wi-fi use.
Sir William Stewart, chairman of the Health Protection Agency, has said there needs to be a review of wi-fi.
He told Panorama that there was evidence that low-level radiation - from devices like mobile phones and wi-fi - did cause adverse health effects.
But some experts in the scientific community have disagreed with [his] assessment.
"Wi-fi seems unlikely to pose any risk to health," said Professor Lawrie Challis, of Nottingham University.
Prof Challis, chairman of the Mobile Telecommunications and Health Research (MTHR) programme management committee, said: "Wi-fi exposures are usually very small - the transmitters are low power and some distance from the body.
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Medical physics expert Professor Malcolm Sperrin told BBC News that the fact wi-fi radiation in a particular school was three times higher than a mobile phone mast was irrelevant, unless there was any evidence of a link to health effects.
"Wi-fi is a technique using very low intensity radio waves. Whilst similar in wavelength to domestic microwave radiation, the intensity of wi-fi radiation is 100,000 times less than that of a domestic microwave oven.
"Furthermore, tissue can only be effectively heated by a wavelength that is closely matched to the absorption, and there are strict guidelines for ensuring such absorption peaks are avoided."
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The Health Protection Agency has said that sitting in a wi-fi hotspot for a year results in receiving the same dose of radio waves as making a 20-minute mobile phone call.
"Some people suspect a non-thermal interaction but there is no evidence to suggest that this exists and indeed it is unlikely," said Prof Sperrin.
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