Langley Grange

Updated: 11 July 2024

Location: Scissett

Developer: Redrow

Number of units: 1 house


Aim(s) of Project: Wondrwall Product Trial: Assess technical implications on design and installation. Gather customer feedback on perception of technologies used.

Construction method: Masonry

Energy Compliance method: SAP 2012

Overheating compliance method: N/A (Pre Part O)


Construction start:  December 2019

Construction finish: September 2021

Overview of Project and Specification

The project was designed to better understand the feasibility of adopting technology to:

  • Deliver Redrow’s drive towards fossil fuel free homes,
  • Provide a better product and more efficiency home for our customers,
  • Align with future carbon reduction requirements in building regulations,
  • Support Redrow’s target to be net-zero carbon.


A trial was undertaken to test the claimed benefits of the Wondrwall Infrared heating system with solar panels. The system provided a gas-free heating and energy system which used IR panel heating supported by PV, battery storage and AI home automation under real life conditions. The trail also aimed to assess the customer experience and to better understand the potential adoption of the technology in future Redrow house designs. 

More information


See Redrow's Case Study Report


For more information contact Rose Sandell



Key learnings


  • The project demonstrated that the technology provided through the Wondrwall system achieved reductions in energy consumption along with subsequence reductions in carbon emissions and running costs. Customer experience was good.
  • The running cost benefits were driven by the PV installation and storage of off-peak electricity in the battery storage. These costs efficiencies resulted in the full Wondrwall system delivering a payback within 6 to 7 years.
  • The project identified that the SAP calculations (at time of the trial) did not allow for the home automation benefits and occupancy and zonal heating.

Performance evaluation


  • The Wondrwall home used net 4921 kWh of energy in total, compared to the control home, which used 9933 kWh of energy. Net energy consumption for the year was 50% lower for the Wonderwall house. CO2 emissions were reduced from 1870kgCO2 to 602kgCO2, a reduction of 68%. The energy costs were reduced by 55%, from £1893 to £851.
  • The Wondrwall home generated solar electricity from the 10 panel PV array, generating 3.4kWp. This generated 2861 kWh of electricity, which contributed £838 of the cost savings, along with generating 998kWh that was exported to the grid, generating a small revenue of £43 over the 12 months period. Additionally, 392 kWh of off-peak electricity was purchased for battery storage and use during peak hours. This generated a saving of £864 compared to purchasing the electricity at full peak costs.
  • The customers have been “astounded” by how low their bills have been in the summer months (they had not yet experienced a winter).
  • They say the house’s intelligent living system is unintrusive and that once they adjusted to the changes it’s been like living in any other homes. “We’ve had a few teething problems, like some ‘white noise’ from the light switches and sometimes the automatic light sensors can be too sensitive or not sensitive enough.” 


The numbers