Posted By CFT These may help: http://www.hse.gov.uk/pubns/indg349.pdf http://www.refcom.org.uk...refrigerants_safely.html http://www.opsi.gov.uk/S...6/uksiem_20061510_en.pdf There are others; I would imagine you will have to comply with the F-Gas regulations due out if memory serves me July (ish) 2007, commenced 2006, can't see any reason why you would not come under them, I have not spent a lot of time looking; the regulation aims to contain, prevent and thereby reduce emissions of the fluorinated greenhouse gases (F-gases) covered by the Kyoto Protocol.I can't be specific on transport based mountable systems although I suspect you will come under the control of refrigerant leakage and associated handling. Sorry, can't offer much more as fixed is what I mainly deal with. CFT