The Whole
House Plan

The Whole House Retrofit Plan

A Whole House Retrofit Plan (WHRP) is produced by a Retrofit Coordinator.  It sets out the scope for improving the energy efficiency and reducing emissions of any home that is proposed for retrofit. The WHRP identifies the retrofit measures most suitable for the home and the occupants’ needs.  It also sets out an appropriate order for the installation of measures.

At its most basic, a WHRP is a comprehensive plan for home improvements. It is devised with the aim of ensuring that the home operates in the most energy-efficient manner possible, with all aspects of the building complementing each other. The WHRP focuses on improving the energy performance of the fabric of a home first including the walls, roof, floors, windows, doors and extends to strategies for effective ventilation and efficient heating.

Possible retrofit measures set out in the WHRP may include, but are not limited to:

  • Insulation
  • Airtightness
  • Ventilation
  • Heating and cooling systems
  • Renewable technologies
  • Water heating systems
  • Efficient lighting
  • Energy monitoring systems
  • Using locally generated power that uses zero-carbon technologies

By considering the whole home, these improvement measures will start a journey to a healthier and more comfortable home to live in.

Obtaining a WHRP is the recommended starting point for all retrofit projects, not only for customers pursuing SuperHomes certification. If retrofit work is carried out correctly, the end result should be a home that’s in excellent condition and incorporates cutting-edge 21st Century technology in order to be as close to carbon-neutral as possible. Following a WHRP also enables key issues such as air quality, damp management and ventilation to be managed appropriately.

WHRP were created to follow the provisions of the Government sponsored PAS 2035 ‘Retrofitting dwellings for improved energy efficiency’. They are also known as a ‘medium-term improvement plan’ for implementation over a period of 20 or 30 years where retrofit improvements are to be carried out in stages. PAS 2035 requires that all retrofit projects undergo a risk assessment, which in turn influences the development of the WHRP, and includes a check to ensure that the measures recommended are compatible with each other and suitable for the home under assessment.

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