A rapid review of the impact of increasing airtightness on indoor air quality

Potential Pollutants and Indoor Air Quality Variables Association towards Implementation of the Breathing Architecture Concept: A Review

“…However, another study shows contrary result that lower airtight of indoors resulting in higher CO2 concentration, which also had indicate had a connection with the installment of mechanical ventilation [47]. Additionally, the [47]'s study emerge that several research discussing about the airtightness of the building show negative association with the CO2 levels, while the rest show there is no clear relationship. Nevertheless, there are possibility in higher exposure of particles generated indoors [48].…”

“…The temperature might had a relationship with solar irradiation since low solar irradiation decrease CO2 levels [46]. However, another study shows contrary result that lower airtight of indoors resulting in higher CO2 concentration, which also had indicate had a connection with the installment of mechanical ventilation [47]. Additionally, the [47]'s study emerge that several research discussing about the airtightness of the building show negative association with the CO2 levels, while the rest show there is no clear relationship.…”

“…Correlation with COx Sources Wind speed Negative [45], [38], [39], [49], [43], [40], [37], [47], [41], [44], [46], and [42] Spaces The outdoor PM level influences indoor PM concentration, which will be advantageous if the outdoor level is lower than the indoor and will be detrimental if the outdoor level is higher than indoor [42]. This detrimental effect happen in other studies showing that longer opening times worsened indoor air by increasing PM levels, this due to high concentration of outdoor PM levels [39] [48].…”

Analysis on the thermal performance of low-temperature radiant floor coupled with intermittent stratum ventilation (LTR-ISV) for space heating

“…In regions with high concentrations of outdoor pollutants, the negative indoor pressure caused by the difference between indoor and outdoor air temperatures in winter can easily allow outdoor pollutants to enter the indoor environment. In recent years, for the concern of enhancing the energy efficiency of buildings, thermal insulation and air tightness of the envelope is getting better and better [24] , which makes it difficult for outdoor pollutants to enter, but also impossible for indoor-generated pollutants to be expelled [25] . To enhance indoor air quality, radiant floor heating with fresh air supply has attracted considerable interest of researchers and has already been applied in practice [26] , which is achieved by installing an additional mechanical ventilation system to send fresh air into the room, the volume of which is determined by the number of indoor occupants.…”

Rebuttal to the Correspondence on Home is Where the Pipeline Ends: Characterization of Volatile Organic Compounds Present in Natural Gas at the Point of the Residential End User

“…Our research shows exposure to carcinogens in our living spaces from gas-fired residential appliances is of increasing concern, adding to well-established risks from exposure to NOx and CO, along with explosion risks. These risks can be further compounded by underlying social and economic vulnerability, as well as building conditions and ventilation rates that have generally decreased in newly constructed homes for energy conservation purposes . Such factors vary greatly across the United States and may substantially deviate from “typical conditions.” While we agree with Long and DesAutels’ comments that further research is valuable, we believe that a greater understanding of the behavioral, socioeconomic, and building factors contributing to higher exposure levels is urgently needed.…”