PSS Homepage Domestic Heating Commercial Heating Heating Controls Hot Water Cylinders Oil Tanks Radiators Solar Heating Underfloor Heating Water Heating General Plumbing Bathrooms Commercial Chinaware Macerators Shower Products Taps Towel Warmers Renewable Energy Commercial Catering Pay securely online using Protx. Products  |   Hot Water  |   Hot Water Heating Water Heating Vented or Unvented ? VENTED otherwise known as Point of Use, have an open outlet and rely on the opening of a tap on the inlet side to displace the hot water in the heater with incoming cold. The open outlet ensures that any excess pressure is vented.You must use special Vented Hot taps with this range. UNVENTED do not need special taps but have to expand either in the pipework or through an expansion vessel.There is are certain min/max criteria to meet i-e mains pressure,min length of pipework for expansion. Unvented is the more common choice for water heaters.   Domestic Water Heaters   Vented Water Heating   Unvented Water Heating   Thermal Storage Water Heaters   Combination Units   Hand Hygeine   Hydroboil Advanced  Bob says...

site design by athenecreations.co.uk