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 The 2007 edition of Rytons Product Guide is out now, containing 46 new products, including ventilators for heatproducing appliances and a range of acoustic background ventilators. The pocket-size guide opens out like a map, enabling you to compare complete product ranges.