HomeFor BusinessKnowledge base News About us Working at Energiewacht My EWG Home Online House Scan Products Actions Customer service Comfortable and energy efficient living energy watch arranges everything from A to Z Top up and vent the boiler Top up and vent your central heating boiler Watch our instructional videos below on how to top up and vent your heating. Please note : in the video below, the central heating boiler has an analog pressure gauge. The plug must be removed from the socket during refilling. If your central heating boiler has a digital pressure gauge that indicates how much you need to top up, turn the boiler off with the on/off button and simply leave the plug of the appliance in the socket while topping up. topping up the boiler vent the boiler 8.3 / 108983 reviews energy watch Home About us My EWG Working at Energiewacht For Business Products Central heating boilers Maintenance Solar panels solar water heaters Insulation Ventilation Air conditioning Other products Customer service reschedule an appointment Sign up as a customer Appointment with advisor Report changes Topping up and venting Report a fault Frequently Asked Questions Contact © Copyright Energy Watch site mapPrivacyCookies We are Energy Watch Energiewacht Groep, Energiewacht and Geas Energiewacht will continue together as one company under one name. read more Close We use cookies to provide you with the best possible service. Yes, I accept cookies We distinguish between necessary, relevant and external cookies. Our necessary cookies ensure that the websites work properly and we use them for analytical purposes. The relevant and third-party cookies help us make our websites, apps, emails and online advertisements more relevant to you. In addition, external cookies ensure that you can share pages via social media and that you see relevant advertisements on other websites. By clicking 'Yes, I accept cookies', you indicate that you agree to the use of cookies and the collection of information on the E.ON group websites . Knowing more? Our privacy statement tells you more about our privacy policy. In settings you can read more about cookies and adjust your cookie preferences.