We are currently conducting a study for potential energy efficiency improvement works and are investigating alternatives to carbon filters that may have lower resistance while maintaining acceptable levels of air quality. We are questioning whether carbon filters are still recommended.
The old British Standard, BS5454:2000 stated (7.5.3) 'Where local monitoring suggests that the fresh air taken into the repository contains sulphur dioxide and/or oxides of nitrogen in excess of 10 micrograms per m3, the air should pass through an activated carbon or alumina filter to reduce these pollutants to below this concentration'. However PD5454:2012 which replaced it does not contain the same stipulation. I do not know if the new draft standard BS 4971 has anything to say on the matter, as the draft is no longer available on the BSI website. We would welcome anyone's experience or views on this please. Kind regards Jeff Dowse | Archive Conservator Surrey History Centre |130 Goldsworth Road Woking | Surrey | GU21 6ND Email: jeff.do...@surreycc.gov.uk * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * This email and any attachments with it are intended for the addressee only. It may be confidential and may be the subject of legal and/or professional privilege. If you have received this email in error please notify the sender or postmas...@surreycc.gov.uk The content may be personal or contain personal opinions and cannot be taken as an expression of the County Council's position. Surrey County Council reserves the right to monitor all incoming and outgoing mail. Whilst every care has been taken to check this e-mail for viruses, it is your responsibility to carry out any checks upon receipt. Visit the Surrey County Council website - http://www.surreycc.gov.uk * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ****** Unsubscribe by sending a message to consdistlist-le...@cool.conservation-us.org Archives through August 2016 at http://cool.conservation-us.org/byform/mailing-lists/cdl/ Archives from September 2016 onward at https://www.mail-archive.com/consdistlist@cool.conservation-us.org/
