Carbon dioxide permeability of building materials and their impact on bedroom ventilation need

Niemelä, Timo; Vinha, Juha; Lindberg, Ralf; Ruuska, Tiina

doi:10.1016/j.jobe.2017.05.009

Cited by 10 publications

(5 citation statements)

References 13 publications

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“…CO2 does not cause harmful health effects when in concentrations above 550 ppm, but if it is in levels above 800 ppm, CO2 can show a lack of fresh air and poor air mixing of air in the building user area It can see a relationship between variables in table 5. is one of the many impurities in the indoor air. It is a normal constituent of exhaled breath and the most significant contaminant produced by the human body [14]. Carbon dioxide (CO 2 ) concentration on three laboratories was lower than 500 ppm.…”

Section: Resultsmentioning

confidence: 99%

The Indoor Air Quality in Laboratory Buildings. A Case Study in Integrated Laboratory of UIN Sunan Ampel Surabaya

Nilandita

Munfarida

Ratodi

et al. 2019

KSS

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Indoor Air Quality (IAQ) is one of the critical issues in sustainable development related to human health as the primary goal. Sustainable development should address potential human exposure to pollutants and health impacts. The laboratory, as educational support in the university, has specific contaminants, but studies on IAQ and thermal comfort in the laboratory have not been studied. IAQ and thermal comfort in a laboratory are essential as they can affect the work and health of the researchers and staffs. The purpose of this study is to analyze indoor air quality in an integrated laboratory of UIN Sunan Ampel Surabaya. This research is a cross-sectional study. Data analysis was done by a quantitative descriptive method. The air quality parameters in the laboratory were temperature, relative humidity, and carbon dioxide (CO2) concentration. All settings compared to the air quality standard. The analysis on carbon dioxide (CO2) concentration, relative humidity (%RH), temperature (∘C) has shown that the indoor air does not exceed the standard according to ASHRAE standard and Health Ministry Regulation with the maximum concentration was 444,3 ppm. The fan installation and increased air filter to controlled humidity are the option to improve the indoor air quality.

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Section: Resultsmentioning

confidence: 99%

The Indoor Air Quality in Laboratory Buildings. A Case Study in Integrated Laboratory of UIN Sunan Ampel Surabaya

Nilandita

Munfarida

Ratodi

et al. 2019

KSS

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“…Hygroscopic and Permeable Building Envelopes (HPBE) can contribute to improve the IEQ in buildings by reducing indoor humidity fluctuations (Yang et al 2014). Besides, the vapour permeability of building materials was found to correlate closely to their carbon dioxide permeability and simulations showed that bedrooms made of building materials with higher water vapour permeabilities experience reduced concentrations of CO 2 (Niemelä et al 2017).…”

Section: Scientific Backgroundmentioning

confidence: 99%

"Hygrothermal Performance of a Hygroscopic and Permeable Wall Assembly: Impact of a Vented Wall Cavity"

Bastien¹,

Winther-Gaasvig²

2018

Healthy, Intelligent and Resilient Buildings and Urban Environments

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Building envelopes that are hygroscopic and permeable to water vapour can contribute to improve the Indoor Environmental Quality (IEQ) in buildings by reducing indoor humidity fluctuations and the concentration of some contaminants like CO 2. However, risks of interstitial condensation and mold growth need to be assessed to ensure the durability of such building envelopes. The objective of this paper is to perform hygrothermal simulations of a case study house designed with a Hygroscopic and Permeable Building Envelope (HPBE) and to assess the impact of having a vented cavity compared to a face-sealed wall. This contribution presents hygrothermal simulations of a wall assembly performed with WUFI Plus and WUFI Pro. The mold index is calculated from the simulation results and the hygrothermal performance of the vented and unvented wall is compared. The resilience of the construction is assessed by introducing leaks within the envelope. Simulation results indicate a satisfactory performance of this wall assembly regardless of the presence of a vented wall cavity. The wall design with a vented cavity seems more resilient when subjected to large leakages, although the wood fibreboard surface seems more vulnerable to mold growth when unprotected by a plaster. Additional simulations and field data are needed for assessing the benefits of having a vented cavity for HPBE.

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“…Indeed, when omitting a vapor barrier, not only water vapor but also other gases are able to diffuse through the building envelope, resulting in lower indoor concentrations for some substances. For buildings that operate with high ventilation rates, any potential IAQ improvement from building materials will be small (Niemela¨et al, 2017), but for the many buildings that lack sufficient ventilation flow rates (Beko¨et al, 2010), a significant IAQ improvement is possible.…”

Section: Introductionmentioning

confidence: 99%

Hygrothermal performance of natural building materials: Simulations and field monitoring of a case study home made of wood fiber insulation and clay

Bastien,

Winther-Gaasvig,

Zhang Andersson

et al. 2023

Journal of Building Physics

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This contribution presents temperature and relative humidity data monitored over nearly two years for a case study building made of natural building materials. The case study building is a single-family house located in Denmark made of wood fiber insulation, wood fiber boards and indoor clay plaster without any membranes. Three different types of cladding systems have been tested: 1) mineral plaster rendering; 2) wood cladding applied directly over wood fiberboards; 3) wood cladding with a ventilated cavity. Monitored data is provided and compared with simulations performed with a commercial hygrothermal software. The moisture content and mold growth index are calculated from monitored data. The data indicates that the hygrothermal performance of the roof is excellent (RH < 70%); the hygrothermal performance of the walls with the three different cladding systems is good; one out of two sensor groups in the floor exhibits a moisture content up to 18% at the cold side of the insulation during summer and fall. Securing sufficient and evenly distributed crawlspace ventilation is recommended for eliminating concerns of eventual mold growth. Measurements show that materials employed in this house respond quickly to moisture changes, more quickly that simulated data. This work highlights the need for validating and adjusting WUFI simulation results with measured data to provide reliable results for building envelopes composed of highly hygroscopic plant-based materials. For these assemblies in these conditions, including a vapor retarder is not needed for achieving a satisfactory hygrothermal behavior.

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Carbon dioxide permeability of building materials and their impact on bedroom ventilation need

Cited by 10 publications

References 13 publications

The Indoor Air Quality in Laboratory Buildings. A Case Study in Integrated Laboratory of UIN Sunan Ampel Surabaya

The Indoor Air Quality in Laboratory Buildings. A Case Study in Integrated Laboratory of UIN Sunan Ampel Surabaya

"Hygrothermal Performance of a Hygroscopic and Permeable Wall Assembly: Impact of a Vented Wall Cavity"

Hygrothermal performance of natural building materials: Simulations and field monitoring of a case study home made of wood fiber insulation and clay

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