Viessmann demonstrates efficiency boosting systems at PHEX

Viessmann is presenting its domestic boiler and renewable ranges at all six PHEX plumbing and heating exhibitions this year (Wembley, April 30; Doncaster, May 8; Silverstone, May 21; Bristol, June 18; Manchester, October 16/17; Chelsea, November 13/14). In addition to a series of graphic displays, a fully piped up demonstration will showcase the leading heating manufacturer’s proprietary four-pipe system. A Vitodens 100-W gas condensing boiler will be connected to a radiator and Vitocell 200-V cylinder to indicate how the four pipe system uses separate heating and DHW flow and returns to