This one hour online session is based upon a case study of an MVHR installation in a Bristol retrofit. The installation represents best practice, but addresses some of the challenges and how they were overcome.

Some seven years on from the installation, owner and building researcher Ian Mawditt shares his views on the different aspects of the installation, through to operation and maintenance, including:

• Planning for a ventilation installation
• Best practice routing and installation of ducting
• Insulation of ducting in different environments
• Commissioning – setting up for correct operation
• Operation – frequently asked questions, covering: controls, noise, dust, filters, etc.

Although the talk centres on an MVHR case study, many of the principles covered apply equally to other ventilation strategies. During the session, Ian will draw from wider experiences from his professional practice, including:

• Relevant research on indoor air quality and ventilation performance (natural and continuous mechanical)
• Experience from commissioning ventilation installations – avoiding the trip-ups

About the Speaker: Ian Mawditt

Ian is a building researcher, specialising in the field of building performance in relation to occupant comfort and indoor air quality. Since 2008, He has been a senior member of the technical team supporting the governments of England and Wales in developing amendments to their respective Building Regulations. Ian is technical lead for Part F (ventilation) and technical author for Part L for dwellings in relation to airtightness, standards for thermal elements, and improving levels of compliance.

Ian is routinely involved in building research programmes, many of which are delivered for national government (BEIS and MHCLG), and for organisations such as AECOM, Energy Saving Trust, the Sustainable and Traditional Buildings Alliance, NHBC Foundation, and the former Zero Carbon Hub. In previous roles, he was appointed by Innovate UK as an expert evaluator under the £8M Building Performance Evaluation programme and provided technical guidance for the £17M Retrofit for the Future programme. Ian is co-chair of the technical working group for ventilation and indoor air quality at the UK Centre for Moisture in Buildings, and is a member of the Retrofit Standards Task Group.