Early-stage concentrations of formaldehydes and TVOCs in a new low-energy building
Paper in proceedings, 2020

This paper deals with temporary discomfort caused by characteristic odours from new objects and materials in office buildings. Earlier investigations have shown that increased ventilation rates in residential buildings decrease the indoor concentrations of non-occupant-related indoor air pollutants such as aldehydes and total volatile organic compounds (TVOCs). To study how this basic principle for the control of indoor air pollutants complies with a demand-controlled ventilation, which is an important energy efficiency measure in modern office buildings, the authors have designed and conducted a serial of field tests. Concentrations of aldehydes and TVOCs have been measured in two newly built and identical meeting rooms under different ventilation strategies. By overruling the existing demand control ventilation and increasing gradually but differently the air change rates in the rooms over a course of five weeks, the concentration of formaldehyde and TVOCs decreased for about 75 % from the initial values of ca. 45 μg/m3 and ca. 400 μg/m3 respectively. Impact of door openings on instantaneous indoor air quality has been studied in parallel by combining CO2 measurements and numerical simulations. Good agreement was found between the simulated and measured CO2 concentrations and thereby the door opening model was verified.

Author

Angela Sasic Kalagasidis

Chalmers, Architecture and Civil Engineering, Building Technology

Fredrik Domhagen

Chalmers, Architecture and Civil Engineering, Building Technology

Sarka Langer

IVL Swedish Environmental Research Institute

E3S Web of Conferences

25550403 (ISSN) 22671242 (eISSN)

Vol. 172 06007

12th Nordic Symposium on Building Physics, NSB 2020
Tallinn, Estonia,

Subject Categories

Vehicle Engineering

Other Civil Engineering

Building Technologies

DOI

10.1051/e3sconf/202017206007

More information

Latest update

8/17/2020