The Effects of Lowering Temperature Setpoints on Perceived Thermal Comfort – An experimental study in office buildings

This study investigates the impact of lowering temperature setpoints on occupants' thermal comfort in office buildings, prompted by government initiatives in Europe, including the Netherlands, to reduce energy consumption. The research methodology involved a case study conducted in three office buildings in The Netherlands. Data on occupants' perception, motivation, clothing thermal insulation, activity level, discomfort, and thermal control options were collected through interviews conducted for thermal comfort surveys and building surveys. Statistical analysis revealed the importance of providing diverse control options to accommodate individual preferences, specially under temperatures outside the comfort zone. Occupants with more control options reported higher satisfaction. Variations in thermal sensation and comfort were observed among gender, age, and BMI groups, with females experiencing more discomfort and cold sensations at lower temperatures. The study emphasizes the need to consider individual differences in thermal comfort and the importance of adequate thermal control in office design and energy-saving measures. The findings contribute to the development of effective strategies for lowering temperature setpoints while maintaining occupant comfort and satisfaction.