BS EN 50440:2015+A1:2020

What is BS EN 50440 about?  

BS EN 50440 discusses domestic electrical storage water heaters. BS EN 50440 specifies methods for measuring the performance of these electrical storage water heaters for the production of sanitary hot water for domestic use. BS EN 50440 states and defines the principal performance characteristics of electrical storage water heaters, and describes the test methods for measuring these characteristics. 

Note 1: BS EN 50440 does not apply to 

• Storage water heaters that use electricity as a secondary source of heating the water 
• Storage water heaters that do not use a tank to store hot water 
• Electric storage water heaters that do not meet the minimum (or maximum) output performance of the smallest (or biggest) load profile 

Note 2: BS EN 50440 does not specify performance or safety requirements 

Who is BS EN 50440 for? 

BS EN 50440 on the efficiency of domestic electrical storage water heaters is useful for: 

• Water Heater Manufacturers 
• Quality control personnel  

Why should you use BS EN 50440?  

High-efficiency water heaters use less energy than standard models, saving homeowners money on their bills. Actual energy savings from high-efficiency water heaters depend on family size, heater location, and size. BS EN 50193‑1 provides you with the test to assess the efficiency of these domestic electrical storage water heaters. 

BS EN 50193‑1 also provides the procedure for the test to be carried out. BS EN 50193‑1 helps you to improve the energy efficiency of your domestic electrical storage water.