Audit of low-tec ventilation systems in office buildings
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Author (Corporation)
Publication date
11.2025
Typ of student thesis
Course of study
Type
01A - Journal article
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Editor (Corporation)
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Parent work
Journal of Physics: Conference Series
Special issue
DOI of the original publication
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Series
Series number
Volume
Issue / Number
3140
Pages / Duration
092010
Patent number
Publisher / Publishing institution
IOP Publishing
Place of publication / Event location
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Abstract
This study examined ten office buildings with simplified ventilation systems. The methodology comprised a user survey, the calculation of embodied energy in terms of greenhouse gas (GHG) emissions and measurements in four of the buildings. The survey shows that in winter 35 % of the participants are satisfied with the ventilation system, 45 % are moderately satisfied (N = 553). In summer the satisfaction rate is slightly lower with 25 % satisfied and 33 % moderately satisfied (N = 458). The measurements however show that the indoor air quality regarding CO2 (IDA (CO2) in all four buildings is better in summer (all buildings are class I), than in winter (all buildings: class II). Regarding indoor environment quality and temperature (IEQ (RT)) in winter all buildings are classified cathegory II, in summer the buildings vary between class I and III, with most of them in class II. GHG calculations show that by reducing HVAC it is possible to save up to 70 % of the embodied GHG emissions used for HVAC. By reducing ventilation alone, over 50 % of the embodied GHG emissions for HVAC can be saved.
Keywords
Ventilation, Low-tech, Measurement, Survey
Subject (DDC)
Event
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ISBN
ISSN
1742-6596
1742-6588
1742-6588
Language
English
Created during FHNW affiliation
Yes
Strategic action fields FHNW
Future Health
Publication status
Published
Review
Peer review of the complete publication
Open access category
Gold
License
Citation
Hoffmann, C., Hauri, C., & Primas, A. (2025). Audit of low-tec ventilation systems in office buildings. Journal of Physics: Conference Series, 3140, 92010. https://doi.org/10.1088/1742-6596/3140/9/092010