Keeping heating under control
29/09/2013
Gas Boiler & Controls

By identifying applications where new gas boilers and controls are needed, heating installers can offer customers significant energy and financial savings. Because everyone has different requirements, it is important to recommend and fit boilers with the most appropriate controls for each individual heating system.

To obtain the best results when installing the latest condensing boilers, modulating room sensors are essential. While the majority of older buildings will already have the basic on/off switching technology that came with the original boiler, this can cause fluctuations in efficiency and room temperatures. Upgrading to a boiler with modulating controls allows water temperatures to be adjusted to within 0.1°C of the set level, ironing out any peaks and troughs, while improving energy efficiency.

Another control device that can improve efficiency is an outdoor sensor. Whereas internal modulating sensors adjust the boiler output depending on the conditions inside, outdoor sensors supply an extra line of data, enabling more accurate system adjustments. So, if the temperature outside suddenly drops (e.g. during a cold snap in winter) the boiler can respond and adjust the system’s flow temperature accordingly.

Furthermore, some of the more sophisticated boilers on the market (such as Ariston’s own CLAS HE evo) are able to be electronically controlled to favour either outdoor or room sensors, depending upon a building’s fabric and thermal efficiencies. This means that if, for example, a property had good levels of air tightness, there would be a bias from the boiler towards data from the internal sensor, whereas a less well insulated building would utilise the outdoor sensor’s data.

Installers should be recommending more than simply standard boiler replacements, and reviewing the existing control strategy should be par for the course. Only then can end users optimise efficiency and reduce utility bills.

Highlights