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Major changes to energy legislaon come into force later this year, aiming to improve the eciency of water heaters – among other products – that use energy or impact energy consumpon. Dan Marndale, Sales Director at Andrews Water Heaters, explains why consultants and contractors must be prepared for this latest ra of regulatory change.

consumption around the world, the Ecodesign of Energy-related Products (ErP) Directive aims to help eliminate the least efficient products from the market. New regulations have gradually come into force over the last few years, which have given organisations time to put in place measures to ensure compliance. However, with a shifting regulatory landscape, it can be challenging for energy professionals to keep up. The Ecodesign of Energy-related Products (ErP) Directive is a EU Directive, implemented by the UK Government in September 2015 to cover all new domestic and commercial heating and hot water products that are equal to or less than 400kW.


The Directive sees stringent efficiency ratings now applied to these products, divided into three tiers and staggered over a four-year period. Tier one came into force in September 2015 and stipulated the maximum storage volume for water heaters, the minimum volume of mixed water at 40°C, and the maximum sounds level for heat pump water heaters.

Tier two became law two years later in September 2017. These regulations focused on water heating efficiency levels and standing loss limits

BOILERS & HOT WATER BSEE Getting up to speed with ErP regulations

ith demand for more efficient products driven by the need to reduce energy and resource

for hot water storage tanks and solar water heaters.

Complementing the Ecodesign Directive is the Energy Labelling Directive. This demands that water heating products with capacities up to and including 70kW are labelled to show their power consumption in a way that makes it possible to compare their efficiency with other models. Energy labelling was first introduced with a scale of A to G for water heaters. In 2017, the Energy Labelling Directive was updated to introduce an A+ energy efficiency class and the G rating was removed. The colour scale remained the same, with dark green representing the highest energy efficiency class and red the lowest. For buildings services professionals and engineers, more effective labelling means that it is easier than ever to make informed purchasing decisions and specify the most energy efficient products.

The third tier of the ErP regulations is due to come into force on 26th September. These will include mandatory limits on NOx emissions for gas, LPG and oil-fired water heaters. For gas/LPG fired products the maximum NOx emissions will be 56mg/kWh and for oil-fired products 120mg/kWh. NOx emissions from non-domestic buildings are a major contributor to poor air quality and the mandatory levels coincide with the growing

scrutiny of NOx following worldwide recognition of the health dangers posed by air pollution.

With the average lifespan of a water heater between 8-12 years, it is important for building managers to think carefully now about replacing kit that’s around eight years old or more, in readiness for the September 2018 deadline. The more stringent NOx emissions and efficiency regulations will be a prompt for many to upgrade to better models of water heater in order to ensure compliance.

The new regulations are also pushing manufacturers to deliver more efficient water-heating solutions. Andrews Water Heaters is continuously looking to identify ways to make products more efficient, and this has resulted in future- proofed low NOx heating solutions that meet the new ErP requirements. We have also focused on

compliance, testing our water heaters to the latest standards to ensure we meet legal requirements. Investment in quality testing equipment means we can get the most accurate results for every product. These efforts ensure we are always prepared for future changes to legislation and can supply contractors with the right products to remain compliant.

The result is that transparency over the efficiency of heating products has put managers in control to make the most informed decisions possible. ‘ With the

average lifespan of a water heater between 812 years, it is important for building managers to think carefully now about replacing kit that’s around eight years old or more, in readiness for the September 2018 deadline.


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