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Lochinvar’s low NOx replacement water heaters

To help contractors and end users meet air quality targets, Lochinvar has developed a low NOx emission version of its Charger direct gas-fired commercial water heaters.

Charger Low NOx water heater.

Charger fast recovery water heaters have been on the UK market for more than 40 years, as a result of this longevity there is now a growing market for replacements.

Incorporating its low NOx burners into the new Charger units has the added benefit of helping the market meet new maximum NOx limits, imposed on direct gas-fired water heaters last year by the revised ErP regulations.

The Charger Low NOx range consists of three models, with storage capacities ranging from 294 to 328 litres and hot water recovery rates from 850 to 1600 litres/hour. NOx emissions are between 33mg/kWh and 45mg/kWh depending on model – comfortably below the maximum stipulated by the new regulations.

The largest model – at almost 90kW output – will deliver 1,600 litres of hot water per hour at a temperature rise of 50 degrees Celsius. This is one of the highest output water heaters of its type available in the UK.

Each of the three models comes with the option of low-level draught diverters to ease the installation process.

Charger water heaters are built using an enamel-lined steel storage vessel, enabling them to operate at pressures of up to eight bar. Each vessel includes sacrificial magnesium anodes to provide cathodic protection and the burner sits at the base of the unit.

The use of baffled flue ways improves heat transfer and provides fast hot water recovery. A multifunctional control valve incorporates flame failure safety, operating thermostat and high limit thermostat.

Lochinvar sales director, Liam Elmore, said: “Providing low NOx versions of some of our most popular water heaters is essential to give contractors and end users choice and flexibility. When it comes to replacing ageing units, we will always encourage users to switch to higher efficiency condensing water heaters, but often this will not be an option.

“For example, replacing the flue system can be complicated, disruptive and expensive depending on the type or layout of the building. Therefore, often the most convenient and cost-effective way to replace an old non-condensing water heater is with a similar product and, by offering low NOx versions, we can ensure customers also comply with ErP legislation and the UK’s wider ambition to improve air quality.”

8 November 2019

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