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New Potterton Commercial combi-boiler in care home heating system refurb

25 July 2013

Baxi Commercial Division has supplied a new Potterton Commercial iHE stainless steel, commercial condensing combination boiler for installation in a heating system refurbishment at Coppice Lea Care Home in Merstham, Surrey

Operated by Caring Homes, Coppice Lea is an elegant Victorian house, sympathetically converted to provide the highest standards of residential and nursing care for up to 50 elderly residents.

A major factor in residents’ comfort is the provision of a warm and comfortable environment with constant availability of sufficient quantities of domestic hot water and it is, therefore, particularly important to provide heating facilities in the most energy efficient and cost effective manner.

With these criteria in mind, it was decided to upgrade the heating system at Coppice Lea Care Home with the Potterton Commercial iHE model from Baxi Commercial Division. This is the only boiler of its type on the UK market and it has been described by a member of Caring Homes’ Facilities Management staff as “more efficient and economical than any other product currently available”.

The boiler was installed by Servio, maintenance contractors of Basingstoke in Hampshire and was described by a spokesman as “state of the art equipment which was very easy to install”. The iHE 150 was installed in a plant room located on the ground floor, adjacent to the kitchen, so the unit’s low noise feature was a particular benefit in this instance. Installed in an unvented system, the boiler was fitted with a horizontal flue.

The model supplied has a capacity of 150kW with a net efficiency of 105.3% at 50oC flow and 30oC return. The integral hot water tank has a capacity of 300 litres and a recovery rate of 2,240 litres per hour through a temperature rise of 50oC. The new heating system serves the care home’s 24 bedrooms as well as communal areas, kitchen and office accommodation, with a total of 36 radiators and 30 DHW outlets.

The new iHE commercial high efficiency condensing combination boiler, which was highly commended in the Commercial HVAC Product of the Year category of the H&V News Awards 2013, produces space heating and hot water from a cascade of heat engines and a tank, enclosed within a single casing. The iHE products incorporate the latest technology, components and are built to the highest industry standards.

Features of this product range include stainless steel heat exchanger and storage vessel construction, low NOx (Class 5), low noise of 49 dB(A), high efficiency, high DHW recovery rates and built-in redundancy. The boilers also incorporate thermoplastic low loss headers, a highly insulated storage vessel, advanced controls and factory fitted relief valves. The appliances are room sealed for use with either vertical or horizontal flue systems and carry a two year warranty.

Compact and lightweight in design, the iHE has a small footprint, making it easy to handle and to locate. The iHE’s fully modulating premix burner modules are each controlled by the very latest cascading intelligent controls with a turn-down ratio of 15:1. The control platform is able to provide outdoor weather compensation, built-in frost protection, hot water priority and anti-legionella function for the stored DHW.

The domestic hot water is supplied via a high performance stainless steel plate heat exchanger providing a high recovery rate of 1,520 or 2,240 litres per hour through a temperature rise of 50ºC with a maximum water temperature of 65°C. For added redundancy, the DHW plate heat exchanger is served by two DHW transfer pumps. The integrated storage vessel has factory fitted temperature and pressure relief valves rated at 7bar/95°C. As in this case, the iHE can be supplied with full 28mm 3.5 bar unvented kit as an optional extra and the concentric flue system can be supplied as either a vertical or horizontal kit, along with any necessary optional additional flue components.

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