Hi,
As a general rule desk top extractors will not be enough, on their own, to cope with fumes from nail products especially acrylics. It is not compulsory to "vent" out fumes and smells, in many cases this is not possible, due to planning permission etc and in most cases all you would be doing is moving the toxic fumes and smells outside to pollute the atmosphere. There are many "source capture systems" available that use activated carbon to "capture" the fumes and smells and do not require outside venting. (just google for them). It actually states in the SR13 Coshh Guidelines "replace charcoal filters when the odour control begins to fail" so these are obviously acceptable to the HSE providing they are effective. If you email me though our website I will send you the relevant documentation to show your environmental health officer and information on a New Activated Carbon Extraction Unit that we will have in the next week that will solve the problem.
Ray Vidler