Ventilation standards to support public health

Questions to the Mayor of London – answered on 24th May 2022.

Alert me about debates like this

Photo of Caroline Russell Caroline Russell Green

In your Accelerated Green net zero carbon pathway, there is a focus on improving the energy efficiency of homes and other buildings. London’s buildings suffer from poor indoor air quality, condensation, damp, and ventilation standards that do not adequately reduce the risks of airborne diseases such as coronavirus. What ventilation standards and approaches will you promote to ensure that these issues are fixed by any investments in improving the energy efficiency of London’s buildings?

Photo of Sadiq Khan Sadiq Khan Mayor of London

Correct ventilation is a vital part of making energy efficiency improvements to a home. In my ‘Warmer Homes’ retrofit programme, a whole house assessment is carried out, which has to include consideration of ventilation. The British Standards Institute introduced  PAS 2035 in 2021, which are the overarching standards to be met for retrofitting buildings. Through the GLA’s contractors the PAS 2035 regulations, and relevant ventilation standards, are adhered to in all our retrofit programmes.  We do not conduct installations of energy efficiency measures that do not meet ventilation standards.

The London Plan outlines ventilation requirements for designing future developments and my Retrofit Accelerator Homes and Workplaces programmes also actively promotes high quality retrofitting. This avoids overheating and unintended consequences, such as a reliance on mechanical cooling or poor indoor air quality. Many projects funded by these programmes include retrofit of the air handling systems, which helps reduce energy demand and improved ventilation in the buildings.