Combi boilers are normally fitted with a vessel of between 6 and 8 litres. This internal vessel may not be sufficient on larger heating systems. You can use this app to calculate the total water contents of the system and it will tell you the vessel size required.
You will no longer have to use any inaccurate methods that calculate the water content from the boiler size. Use the app to find the water content of each radiator in turn for the entire house. Then enter the estimated length of 15mm, 22mm, 28mm and 35mm pipes, add any additional water contents such as for the boiler (2-4 litres normally) and a towel rail and then press the 'Calculate' button.
The app will show you the total water contents for the entire system and the vessel size required. If this size exceeds the vessel fitted to the boiler, an additional vessel will be required. Simple!
Email or Export:
Once you have your results you can email them directly from within the app or export them to another app that supports text files, such as Dropbox, Google Drive or Evernote.
The app also comes with a built-in guide containing 5 pages:
• How expansion vessels work
• What goes wrong
• Common symptoms
• Vessel pressure guidance
• Repressurising instructions
You are allowed to use this product only within the laws of your country/region. SharewareOnSale and its staff are not responsible for any illegal activity. We did not develop this product; if you have an issue with this product, contact the developer. This product is offered "as is" without express or implied or any other type of warranty. The description of this product on this page is not a recommendation, endorsement, or review; it is a marketing description, written by the developer. The quality and performance of this product is without guarantee. Download or use at your own risk. If you don't feel comfortable with this product, then don't download it.