AECB lifetime carbon modelling suggests that either of our two retrofit standards should deliver dramatically lower lifetime carbon emissions for homes - compared to not retrofitting. Over time we imagine two waves of retrofit happening, with some step-by-step projects progressing to full retrofit, depending on future policy and financial developments.
Summary and Webinars
Reducing the energy used to heat and power existing buildings, whilst making homes healthier and more climate-change resilient is a critical part of the UK’s necessary transformation towards a more responsible, ecologically, and socially sustainable society.
Our Retrofit Standard can be done step-by-step with a minimum first step called 'Step1' - This recognises the practical and financial challenges faced by ‘early adopter’ retrofitters in the absence of a working UK retrofit programme. They offer a pragmatic and flexible approach to retrofitting existing buildings, and the new Approved Certifier scheme streamlines and strengthens the AECB’s approach to Quality Assurance.
The energy and non-energy benefits of a deeper retrofit may justify adopting the full Retrofit standard for some projects, whereas the faster and lower capital cost Step 1 may be more appropriate for other projects. Completing a step 1 retrofit does not lock out later works to take the building to a cost-effective full Retrofit. The Step 1 retrofit standard might also be called a ‘heat pump retrofit’ standard as it has been designed for a lighter fabric retrofit, effective ventilation and an electric heat pump. The full Retrofit standard allows retention of the existing heating system if required, and is designed for a deeper fabric retrofit.
In order to maintain the integrity of the standards and ensure consistency of application, the AECB uses Approved Certifiers to confirm that projects have met the AECB CarbonLite Standards.
All our certifiers are AECB members, approved by us to carry out project certification. Certifiers undertake regular AECB CarbonLite CPD.
- The AECB Standards are based on the Passivhaus methodology, and certifiers use the Passivhaus Planning Package software (PHPP)
- The certifier may choose to appoint a separate PHPP modeller as part of their certification service, or may do this in-house
- Once modelled in PHPP, certifiers use the AECB CarbonLite LEBD Uploader software to collate project data and evidence and automatically upload the certified project to the Low Energy Buildings Database
Our other CarbonLite Standards
AECB PHribbon makes using PHPP quicker, easier and it uses the existing information beyond just energy. It enables you to build the PHPP faster and the CO2 calculations benefit designers, consultants and clients by making it an easier, quicker process.
Learn more about this exclusive AECB software