Respond to these showcases www. ajplus. co. uk/ajdirect Readers may obtain information about these products by filling in the enquiry numbers on an AJ enquiry card. Advertisers wishing to promote their products on these pages should contact Chris Bond on 020 75056816 Addvent has just celebrated its 10th anniversary. A decade on and it has become an established leader in electrical venitilation products, offering one of the most comprehensive ranges on the market. The company provides a selection of over 150 domestic, commercial and industrial products.