Accessible Text Alternative for Diagram showing Percentage of Occupied Spaces Failing TM 52 Criteria after Mitigation

Here you can find a text alternative to a diagram relating to overheating in historic buildings where summertime comfort modelling was carried out Historic England Offices at Cambridge, Swindon and York. Specifically this shows  the percentage of occupied spaces failing TM 52 criteria after mitigation measures have been applied, taking 2050 weather data as the baseline.

 

Cambridge office

The unmitigated baseline figure for this office by 2050 would be 57% failing.

  • Measure A: Reduced occupancy to 90%. Percentage failing would be 54%
  • Measure B: Solar control film applied to windows to reduce G-value (a measure of how much solar heat -infrared radiation- is allowed in through a particular part of a building) and solar gain admittance into the building. Percentage failing would be 39%
  • Measure C: Night-time ventilation of 5 air changes per hour between midnight and 7am  Percentage failing would be 46%
  • Measure D: Improved building airtightness from 0.7 to 0.55 air changes per hour of external infiltration. Percentage failing would be  57%

Swindon office

The unmitigated baseline figure for this office by 2050 would be 56% failing.

  • Measure A: Reduced occupancy to 90%. Percentage failing would be 49%.
  • Measure B: Solar control film applied to windows to reduce G-value (a measure of how much solar heat -infrared radiation- is allowed in through a particular part of a building) and solar gain admittance into the building. Percentage failing would be 33%
  • Measure C: Night-time ventilation of 5 air changes per hour between midnight and 7am  Percentage failing would be 41%
  • Measure D: Improved building airtightness from 0.7 to 0.55 air changes per hour of external infiltration. Percentage failing would be  57%

York office

The unmitigated baseline figure for this office by 2050 would be 42% failing.

  • Measure A: Reduced occupancy to 90%. Percentage failing would be 35%
  • Measure B: Solar control film applied to windows to reduce G-value (a measure of how much solar heat -infrared radiation- is allowed in through a particular part of a building) and solar gain admittance into the building. Percentage failing would be 23%
  • Measure C: Night-time ventilation of 5 air changes per hour between midnight and 7am  Percentage failing would be 19%
  • Measure D: Improved building airtightness from 0.7 to 0.55 air changes per hour of external infiltration. Percentage failing would be  44%