Open AccessExperimental measurements of CO2 concentrations in sleeping rooms
Author(s) -
D. A. Adîncu,
Aristotel Popescu,
M. Atanasiu
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/997/1/012137
Subject(s) - bedroom , environmental science , indoor air quality , microclimate , hvac , ventilation (architecture) , relative humidity , carbon dioxide , natural ventilation , thermal comfort , air conditioning , air quality index , energy recovery ventilation , humidity , environmental engineering , architectural engineering , waste management , meteorology , engineering , civil engineering , ecology , mechanical engineering , geography , biology
People spend nearly one-third of their life on sleeping. Several factors can affect bedroom air quality and comfort of sleep, such as temperature, relative humidity and air quality. The most common indicator of indoor air quality is the concentration of carbon dioxide, its presence in indoor environment being strictly related to respiration and human metabolism. Since 2002, when the European Parliament and Council approved the directive on energy performance of buildings, EU member countries launched various programs for refurbishment of buildings and HVAC (Heating, Ventilation and Air Conditioning) systems, in order to reduce the energy consumption. Unfortunately, the renovation operations, such as replacing old windows with new tight ones or thermal insulation of the facades, lead to tightly sealed interior spaces. Insufficient infiltration of fresh air and limited natural ventilation result into increased pollutant concentration and deterioration of the indoor microclimate. Permissible concentration of carbon dioxide in the closed spaces according to World Health Organization is 1000 ppm. When the level exceeds this threshold, occupants may complain of headaches, drowsiness, lack of concentration and fatigue. The present study shows the measurements of carbon dioxide concentrations conducted in several sleeping rooms located in refurbished buildings, with or without mechanical ventilation system for fresh air supply, as well as suggested measures.