Citywest homes retrofit uses Baxi Ecogen for reduced carbon emissions


City west homesNumber 88 was upgraded under the Technology Strategy Board initiated Retrofit for the future programme, by Westminster arms length management organisation (ALMO) City West Homes. The mid-terraced, two-bedroom solid-walled house, which was built in around 1880 was awarded £150,000 to fund a retrofit to deliver an 80 per cent reduction in carbon emissions using a range of technologies. The retrofit was designed by ECD Architects, and works were carried out by United House.

A Baxi Ecogen micro-combined heat and power (CHP) unit was installed. When heating or hot water is being produced, the unit will generate 1kW of electricity per hour, sufficient to run the television, washing machine, low energy lighting and mechanical ventilation with heat recovery (MVHR).

"Baxi is continually committed towards the reduction of carbon emission in the home. Being a part of retrofit projects is a great step towards a greener future and Baxi values investment into these initiatives." says Simon Osborne, Specification Channel Manager at Baxi.

Space and water heating are controlled by a WattBox, which automatically adjusts heat and water timing and temperature to suit occupants, while minimising energy consumption. It does this by monitoring occupant behaviour patterns and temperature preferences. LED lighting has been installed throughout, while white goods in the kitchen are A++ rated. Low volatile organic compound (VOC) paint has been used throughout the house and the kitchen floor has been fitted with marmoleum (a linseed oil based flooring).

Like all Retrofit for the future projects,88 Lothrop Street is being monitored in use for two years, to allow the effectiveness of the interventions to be assessed for future projects.

Because of the location, conventional roof-mounted renewable installations were not permitted. The architect instead proposed to install a 'solar slate' product that would mimic traditional roofing, on the 18m2 south facing roof pitch. The planning authority was not happy with the appearance of the solar slates, because the products had a crisp aluminium edge rather than a hand-riven slate one and were fixed using hooks rather than nails. This led to the adoption of CHP as an alternative.

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