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increasingly high efficiency and ultra-low NOx criteria. As a result, condensing boilers are a straightforward, reliable, tried-and-trusted heating solution for compliance with all legislative and environmental regulations.

Take the new mandatory Ecodesign NOx requirements for space heaters up to and including 400kW that will come into effect this month under the Energy-related Products Directive. A maximum NOx emission level of 56mg/kWh has been set for gas and liquefied petroleum gas (LPG) boilers and 120mg/kWh for oil-fired boilers on new build and refurbishment projects. With NOx emissions at or below 40mg/kWh, advanced condensing boilers easily comply with ErP 2018 as well as the more stringent requirements set by the London Plan in high pollution areas. At the same time, they achieve the highest Class 6 rating of the European Standard EN 15502 Pt 1 2015.

Cleaner heat

Air pollution has risen sharply up the environmental agenda in recent years due to concerns over its impact on public health. NOx, one of the groups of greenhouse gases that have fallen under particular scrutiny, is typically emitted by buildings and their heating. Cleaner heat means cleaner air. Not only do old non-condensing boilers waste energy, they emit high levels of NOx – between 150 and 260mg/kWh1

according to recent analysis.

Condensing boilers perform significantly better, so a boiler upgrade would make a considerable contribution to the drive for improved air quality. By taking action in this way to reduce NOx emissions, businesses and organisations can minimise their environmental impact, enhancing their reputation and helping protect the planet.

Eciency savings

More efficient heating also generates a more comfortable building environment. The more


reliable, easy-to-control heating service provided by condensing boilers can help improve the wellbeing of the building’s occupants and, ultimately, their productivity.

A study by the World Green Building Council found that people's performance could fall on average by 6% if a room is too hot and 4% if too cold.

To address this, forward-thinking manufacturers have introduced condensing boilers with intuitive, easily-set time and temperature controls supplied as standard that put control into the hands of the maintenance team. Optional controls for zoning and easy connection to the building management system further maximise building comfort levels and system efficiency.

Designing for the future

Energy efficiency must be an integral part of current and future plans for heat in buildings – and cost-effective, high-efficiency condensing boilers have a vital role to play. Investing in this affordable technology is a practical means of achieving considerable energy, carbon and NOx savings and creating a cleaner future. Where London leads, the rest of the country tends to follow. The transformational impact that commercial condensing boilers can have on a building’s energy performance and air quality has led the Mayor of London to introduce a cleaner heat cashback scheme to encourage boiler replacement. Small to medium sized enterprises in London relying on coal or biomass boilers of any age or gas or LPG boilers that are a minimum of 10 years old and a total minimum output of 70kW can apply for a contribution of 30 (or 35% in Air Quality Focus Area) towards the cost of new high efficiency, low NOx boilers.

As manufacturers, we applaud this move to support simple, low-cost options that will incentivise a transition to cleaner heating, and with our expertise can advise on how best to

uRemeha’s advanced Remeha Quinta Ace 160 replacement condensing boilers have been installed at Keele University's David Weatherall Building.

benefit from the plan. But even without funding, condensing boilers continue to offer a cost-effective investment into long-term energy, emissions and efficiency savings.

A small piece of the heating puzzle, perhaps. But by providing a practical, affordable solution to cleaner heating, this flexible, reliable and highly-efficient technology supports the drive for reduced energy usage, paving the way to a lower carbon future. 1

Aether and Amec (2015) Reducing harmful emissions from buildings: Updating LAEI domestic building emissions. Unpublished report provided by the GLA

The exact

savings from retrofing

condensing boilers will depend on the nature of the building and the exisng boilers. But some of our customers have seen gas consumpon fall by up to 48% aer retrofing condensing boilers, while others have benefited from an annual carbon reducon equivalent to 217 tonnes.



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