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www.heatingandventilating.net


Installer friendly and efficient


Modern heating systems must not only comply with increasingly strict legislation, but also provide minimal running costs for the end-user. Efficiency is no longer a ‘nice to have’, it is critical for businesses to remain compliant and cut down on energy costs. Steven Evans, sales director at Potterton Commercial, discusses how installer-friendly heating products are responding to these changing needs


couple of years. Since September 2015, if a non- condensing commercial boiler under 400kW needs to be replaced, a high-efficiency condensing boiler needs to be installed. Further regulations came into force in September which state that all gas-fired appliances must have NOx emissions under 56mg/kWh. As a result, older units are gradually being phased out and manufacturers are being forced to innovate with new products that meet the new requirements.


R In-built efficiency


Potterton Commercial’s Sirius three range offers ultra-low NOx emissions of 24.7mg/kW, thanks to the Sermeta bluejet burners, and a seasonal efficiency of more than 96%. What’s more, the product is listed on the Energy


Technology List (ETL) as approved for the Enhanced Capital Allowance (ECA) tax scheme, meaning companies can write off the cost of the new plant or machinery against the business’s taxable profits in the financial year the purchase was made. A key indicator of efficiency and low running costs


is the product’s modulation ratio – the difference between the maximum and minimum output of a boiler. A wide boiler modulation ratio reduces constant on/off cycling, improving efficiency and extending the life of a boiler. With this in mind, the Sirius three range offers a market-leading modulation ratio of up to 9:1. For the 50kW model, output can be as little as 6kW when demand is not present. This feature is of particular benefit for premises that have fluctuating heating demands, a trend that is on the increase due to flexible working trends.


Easy upgrades


The new Sirius three range is also designed to be compact, with the 130 and 150kW models available in the same footprint as the 90 and 110 products. This gives engineers the choice of more power


 October 2018


without additional bulk. The 130kW boiler is currently unique to Potterton Commercial and was developed following industry feedback which identified it as the ideal output for a wide variety of commercial projects. Continuing the trend of quick and easy


installation, Sirius three boilers are also lightweight making them easier to move and install in the desired location. What’s more, the larger floor standing models have casters, so they can be easily manoeuvred, and they are slim enough to fit through service doors and lifts – making them easy to position in the basement or even on higher floors of a building. The entire range comes with advanced Siemens


controls with a full-knob Human Machine Interface (HMI) making for more straightforward programming and commissioning.


Consider a cascade


Alternative approaches to boiler system design, such as cascades, should also be considered to provide even greater efficiency and long-term cost savings. Cascades offer greater efficiency than singular boilers as they have a high turndown rate, with a substantial difference between the highest and lowest output available.


ecent legislation for space heaters in commercial premises has drastically changed the market for boilers in the last


Potterton Commercial’s Sirius three range offers ultra-low NOx emissions of 24.7mg/kW, thanks to the Sermeta bluejet burners, and a seasonal efficiency of more than 96%. The product is listed on the Energy Technology List (ETL) as approved for the Enhanced Capital Allowance (ECA) tax scheme, meaning companies can write off the cost of the new plant or machinery against the business’s taxable profits in the financial year the purchase was made


For example, six 90kW Sirius three boilers on a


cascade set-up have a maximum output of 540kW, but an individual boiler can also modulate down to 10kW to save energy when demand is not present. In fact, Sirius three can offer cascade solutions up to 1MW. Multiple, linked boilers can respond more


effectively to varying heat loads, making a cascade the perfect solution for buildings with changeable demand schedules. Furthermore, more than one boiler in a system adds a layer of redundancy as in the unlikely event that one breaks down, the system will continue to operate, albeit at reduced levels.


Delivering results


Manufacturers like Potterton Commercial are under constant pressure to innovate in order to meet the needs of installers and end users alike. With efficiency, compliance and space-saving three key requirements, the Sirius three range fills an important gap in the market. Products which offer different power outputs with the same size footprint are easier to site and are more responsive to fluctuating demand. This ensures that customers get maximum performance and efficiency – a versatile heating system that delivers flexible, controllable power.


www.heatingandventilating.net


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