Saturday hours by appointment! A new boiler will increase efficiency, reliability and performance it will also reduce carbon emissions and help cut your fuel bills. Thank you for using wpj heating, we wish you a great day! Telephone: | . Citric acid is often using for canning as well as bath bombs, so it’s fair to say its usages are rather varied! Regulation of water temperature - heating air circuit. Why choose a worcester accredited installer? Year.