Project Overview

Existing heating boilers at Bradeley Village retirement community in Stoke-on-Trent were reaching the end of their serviceable life. Staffordshire Housing Association sought a replacement solution that would reduce exposure to increasing gas costs and take advantage of support for low carbon heating via the renewable heat incentive (RHI). Due to the daytime electrical base load, the site was also recognised as ideal for roof mounted PV supported by Feed in Tariff (FIT) incentives.


Bradeley village is a sheltered housing village with 238 apartments and communal facilities including gen-eral store, coffee shop, gym, hair salon, laundry and extensive indoor communal areas. Briar in-vestigated the feasibility then designed and project managed procurement & installation of a roof mounted PV array and replacement of existing gas boilers with a biomass & efficient gas boiler solution.

Project Main Features: Heating

Five twenty year old 54kW gas boilers located in two plant rooms were replaced with a single 195kW wood pellet biomass boiler (lead) and two 85kW fully modulating gas boilers (lag role), associated plant room equipment was modernised and a 30m3 pellet silo was housed in a purpose built brick extension.


  • Plant consolidated into one energy centre
  • Heating system refurbished
  • Roughly equivalent running costs & £23k/yr RHI income mean investment pay back in 12 years
  • Carbon dioxide emissions reduced by 43 tonnes per annum.

Project Main Features: PV

Two hundred 250Wp mono-crystalline PV panels were installed on the south facing pitched roof providing a 50kWp array. The bulk of low carbon electric-ity generated will be consumed within the site therefore maximising the benefit of avoided grid electricity purchase along with receipt of FIT.


  • Savings and FIT income of £9,700 per year
  • Low carbon electricity generated saves 22 tonnes of CO2 a year
  • Investment paid back in under 8 years
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