Andrews Water Heaters revamps leading sizing tool for caravan and campsites

Andrews Water Heaters has launched a new and improved version of its original sizing tool for water heater specification: Size-it. Quicker, personalised and now accessible online on any device, specifiers working on caravan and campsite projects can instantly get a recommendation on the most suitable water heaters with just a few clicks.    


Users simply enter the number of pitches and length of the peak usage period online. The tool’s ‘quick calculator’ then gives initial product recommendations based on the information entered. For more detailed sizing, users can then create an account or log in for free and input further information such as the temperature of hot water needed, the number of fills required and duration of use for each type of appliance on the site. 


Available for free via the Andrews Water Heaters website and, the new tool also allows users to manage a portfolio of projects and tailor the sizing to their exact property type and hot water requirements. Size-it also provides up-to-date legislative guidance and all information given can be easily downloaded as a summary or detailed report.

size it

Size-it calculations are based on the hot-water requirements guidance in CIBSE’s Guide G Public health and plumbing engineering and Andrews Water Heaters’ 40 years’ experience in hot water generation.


Chris Meir, sales director at Andrews Water Heaters, said: “Size-it was the first sizing tool of its kind for the UK water heating industry, and remained the market leader. Following recent insight into the needs of our customers, we’ve made the UK’s number one sizing tool even better.


“Size-it is now more user-friendly and informative than ever before and can be accessed online on any device. Users can save project templates for future jobs, share sizing and can earn a 2% heat efficiency credit* just by using the tool.


“Ultimately, we’ve made it as easy as possible for busy professionals to get the information they need in order to match the right product to the right job.”


Introduced in 1996, Andrews Water Heaters’ CD sizing tool was the first of its kind for the water heating industry. The launch of the new Size-it is the latest milestone in the company’s successful history and coincides with its 40th anniversary celebrations.


For more information and to try out the new Size-it please visit:


* When assessing the expected performance of water heaters for compliance with Building Regulations Approved Document L an additional 2% heat efficiency credit is given for the use of manufacturers’ water-heater sizing guides.


May 9, 2017

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