Andrews Water Heaters revamps its Size-it tool

Andrews Water Heaters, DHW

Andrews Water Heaters has updated and improved its long-established Size-it sizing tool for water heaters. It is now quicker, personalised and accessible online from any device to help specifiers select the most appropriate water heater from Andrews for a project

The software is free to download and use and enables users to manage a portfolio of projects and size water heaters to the type of property and hot-water requirements. Size-it also provides up-to-date guidance on legislation, and all information can be downloaded as a summary or detailed report.

Size-it calculations are based on the guidance for hot-water requirements in CIBSE’s Guide G and Andrews’ 40 years of experience in generating hot water.

Users can save project templates for future jobs, share sizing and earn a Part L 2% heat-efficiency credit.

Related links:
Related articles:



modbs tv logo

Rinnai UK launches applied products division

Rinnai is launching a new division - Rinnai Applied - which will be dedicated to the design, supply and service of larger HVAC units and systems that will meet the specific heating, ventilation, air conditioning and hot water demands of commercial and industrial premises.

Engineering services alliance welcomes government consultation on retentions and late payments

Actuate UK, the engineering services alliance, has welcomed the new government consultation on reforming cash retentions and taking legislative measures against late payments to small businesses, as part of the new Small Business Plan unveiled on 31st July 2025.