A breath of fresh air for hospital patients

St Mary's Hospital


St Mary’s Hospital creates a healthy indoor environment for patients

Activ'Air® ceiling and plasterboard products cut formaldehyde by more than 40%, reducing health risks at the hospital.

Mark Walsh, project manager at Balfour Beatty, said: “We were asked to create a healthy environment at St Mary’s Hospital to improve patient wellbeing, and British Gypsum’s Activ'Air seemed perfect for the job. We were able to offer an innovative solution for Northamptonshire Healthcare NHS Foundation Trust (NHFT) to address the issue of indoor air quality and the results speak for themselves – the innovation has reduced the concentration of formaldehyde in the atmosphere, improving the environment for patients and staff at the hospital.

In addition to the end-user benefits, the Activ'Air technology works through a paint finish, the products are easy to install, and they offer the same fire, acoustic and durability performance as the standard ceiling and plasterboard ranges – important factors that we have to consider when selecting new solutions.

Neil Austin, project manager at NHFT, said: “NHFT always looks for opportunities to improve the environment for patients, visitors and the staff. The trial of Activ'Air products in existing buildings and use in the new unit further confirms our commitment to look at all aspects of care for our stakeholders.

GypWall CLASSIC, GypWall ROBUST, GypWall QUIET and GypWall QUIET SF systems were used to meet the projects acoustic and duty requirements in accordance with BES5234 Part2 1992.

Find out more about Activ'Air technology

  • Client: Northamptonshire Healthcare NHS Foundation Trust
  • Main Contractor: Balfour Beatty


Formaldehyde reduction is based on experimental data following IS016000-23 standards from 0.4m² to 1.4m² installed/m³ room.

Lifetime has been confirmed experimentally and analytically on a commercial board sample in the frame of a collaborative work with independent certified body ULE and Pr J. Zhang , University of Syracuse, expert in Environmental Chemistry and Engineering, Mechanical ventilation and Indoor air quality.

    St Mary's Hospital

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