This development will create 137 new homes, including 53% affordable housing, on the long-term vacant site. The development will deliver attractive new public realm improvements, including planting, street furniture, and a private courtyard for residents. The building will consist of a part eight and part 18 storey building which draws inspiration from local post war architecture, including the iconic No. 1 Croydon building.

calfordseaden were appointed to delivery the initial scheme and were retained to deliver RIBA 4 to 6 detailed design. The scheme was submitted with a communal heat network with gas boilers and CHP. Midway through GLA energy offices the CHP be changed to a heat pump solution. calfordseaden presented a hybrid heat network design of gas boilers and air source heat pumps. The strategy was positively accepted by the GLA.

By retaining the gas boilers the client was reassured that the system could still deliver the project brief aspirations of reliable heat at affordable cost. The gas boilers reduced the proportion of heat demand required by the heat pumps and therefore fewer heat pumps were required. This meant that the site electrical capacity did not need to be significantly increased and an additional substation was not required.

At detailed design we visited existing air source heat pump installations to consider the visual and noise impact to adjacent residents. We then in collaboration with the schemes architects and acoustic engineers, designed an enclosure to house the heat pumps at ground floor level. We also engaged with the heat pump manufacturers to ascertain the best control method to optimise the heat pump efficiency. The retention of the gas boilers have allowed the heat pumps to be controlled at variable outlet temperatures, maximising COP, while ensuring the heat network flow temperature is always maintained. The result of this design is that the technologies can be used to provide the most efficiency production of heat, at lowest fuel costs to the residents