The AECB CarbonLite retrofit online training course

carbonlite retrofit training logo

This cutting edge advanced retrofit training course is the culmination of five years of investment by the AECB:

  • Develop your understanding of heat and moisture in buildings.
  • Understand the issues that can arise from the repair, insulation, draught proofing and ventilation of existing buildings (relevant to a wide range of construction types, based mainly on UK examples of different ages)
  •  Learn about ways to avoid or manage unintended consequences.
  • Find out about investment appraisal methods for retrofit.

AECB members – book now to get immediate access to course


AECB Members: £410+VAT
If you are not an AECB member, please join here prior to booking the course.  Passivhaus Trust members qualify for a 20% refund of AECB membership fee.  Please email here to claim your refund after joining.

 “I wish this course had been available at the start of my career  Daren, Architectural Technologist

A superb course” Lois, Environmental scientist and currently retrofitting own home

The knowledge gained from this course and how it will assist me in my work is well worth the time and very reasonable cost at the outset” Richard, Passivhaus Designer

The course has exceeded my expectations” Jon, Property Manager

The AECB CarbonLite retrofit online course is open for new bookings. Students who book onto the course will immediately gain access to the course materials. Most students will aim to complete the course in twelve months but the course is flexible for those who need longer. Module start dates shown below are guidelines only.  The dates in bold are fixed.

Modules 1 and 2 start 1st January 2018 or sooner

Module 3 start by 1st Feb 2018, homework due 26th February, webinar 5th March with Bill Butcher

Module 4 start by 6th March 2018, homework due 23rd April, webinar 30th April with Eric Parks

Modules 5 and 6 start by 1st May 2018, homework due 9th July, webinar 16th July with Andy Simmonds and Tim Martel

Module 7 start by 17th July 2018, homework due 17th September, webinar 24th September with Alan Clarke

Module 8 start by 25th September, no homework, webinar 5th November with Tim Martel

 Student studying onlineWho is this course for?

The CarbonLite Retrofit Training Course is an online course, aimed at construction professionals and those whose role involves decision making around retrofit.  The course brings together a wealth of knowledge on low energy building retrofit  and methodology. To get the most out of taking the full course you will already have good professional knowledge within the construction sector.  You will have a serious interest in how to do advanced energy efficient retrofit and be wanting to deepen your understanding of building physics and the risks associated with measures, to enable you to make informed decisions.

Homeowners with a desire to drive their own retrofit projects will also find this course useful. While only the more technically minded will be interested in all the detail, there is much useful knowledge even for those who are less technical.

Earn 35 Passivhaus Institut (PHI) credit points on successful completion of course

The Passivhaus Institute have agreed that delegates passing the course will be allocated 35 credit points on receiving their certificate. This will be useful to Passivhaus designers/consultants looking to renew and in terms of cost, it is very competitively priced option compared to other Passivhaus CPD events.

  • Find out why architects and Passivhaus designers are recommending this course.

  • Meet students on the current course who share their positive experiences

    Two current students advise why they enrolled and why they recommend the course


    Course Approach

    • Read and follow modules at your leisure, to fit around work and other commitments
    • There is an online test at the end of most lessons to check your learning
    • Communicate with fellow students and the module tutor to discuss learning or to post questions arising from the material on the dedicated on-line forum.
    • For each of the core modules there will be a homework task based on real projects.  This will be reviewed via an on-line tutorial where tutors and students can discuss these projects.
    • Currently being finalised – the right to self-certify projects under the CarbonLite Retrofit Self-Certification system

    Course Content

    • The direct and indirect benefits of robust retrofit
    • Climate zones, local micro-climates and impact of changing weather patterns
    • Understanding existing building structures and materials
    • Energy and buildings
    • Moisture and buildings
    • Building services, including ventilation and heat
    • Financial appraisal – is retrofit a good investment?
    • Case studies

    Course Tutors


    Andy Simmonds has been working on this material for the last three years and brings together his experience as a low energy building designer with research into moisture and energy issues. Andy’s own house was the first certified (and monitored) domestic EnerPHit retrofit in the UK.
    Eric Parks is an experienced Passivhaus architect and building physics trainer on the CarbonLite Certified Passivhaus Designer course, he has co-written a number of the sections of this material.
    Bill Butcher is an experienced Passivhaus builder, with years of low energy building retrofit experience. Bill is a trainer on the Construction Module of the Carbonlite Certified Passivhaus Designer course and a Certified Passivhaus Consultant and Tradesperson.
    Dr Tina Holt trained as an earth scientist with particular focus on the causes and impacts of climate change. She has worked in education, IT and editing technical information for a broader audience. In 2011-12 she retrofitted her own home close to the EnerPHit standard and consults on domestic energy efficiency.
    Alan Clarke is one of the UK’s most knowledgeable energy consultants and building services engineers, specialising in Passivhaus design, building on long experience of low energy and ecological construction.  His Passivhaus projects include individual and group housing, schools, community centres and offices.  In addition to design work he is involved in detailed monitoring of several of these projects which are now completed and occupied, learning invaluable lessons about the real life performance of low energy buildings.
    Tim Martel is a freelance Chartered Architectural Technologist and Passivhaus Designer with a background in calculations through commercial R&D.  He uses BIM with Simmonds.Mills Architects and others in new build and retrofit projects and is at the forefront of the AECB’s retrofit research in moisture monitoring/hygrothermal behaviour and economics. Tim reads widely to expand knowledge of these areas.  He uses computer programming in AECB spreadsheets to overcome the calculational challenges in moisture monitoring and economics for the Carbonlite Retrofit course.

    Course requirements

    • You will need to be an AECB member so please join here prior to booking the course.  
    • The next course will officially start in January 2018, hower, if you book now, you will have full access to the materials immediately.  It is staged to allow for prior commitments for holidays and work.
    • All material is presented on-line so a reasonable internet connection is required.
    • Links to additional reading
    • Access to a speaker and microphone in order to join webinars.

    Preview a lesson here

    Meet and find out how to contact graduates who have now successfully completed the course.

    If you have any questions about the course please email here.

    AECB members – book now to get immediate access to course

    AECB Members £410+VAT 

    If you are not an AECB member, please join here prior to booking the course. Passivhaus Trust members qualify for a 20% refund of AECB membership fee.  Please email here to claim your refund after joining.

    Note for non-members – Join us as a company and all employees are covered by membership.




    Retrofit Coordination and Risk Management Course

    We are pleased to endorse The Retrofit Academy CIC’s course on reducing and managing risk in domestic retrofit. The courses are available to arrange in house for your organisation. Please visit or more information.

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