Examination of Occupant Arrangement in an Office Floor based on Nonuniformity of CO2 Concentration Using Computational Fluid Dynamics (CFD) Simulation

Heating, ventilating, and air conditioning (HVAC) systems attempt to achieve a uniform indoor environment. However, this can be challenging, because the placement and control of HVAC systems and sensors are affected by many unpredictable factors. The efficacious exploitation of this nonuniformity can lead to an improvement of indoor environment around occupants. Of the many indoor environment variables, we focused on the CO2 concentration associated with ventilation.

Thermal Comfort and Indoor Environment with Wearing a Mask

The purpose of this study is to clarify the respiratory characteristics and productivity with wearing a mask, and to propose the indoor control strategy to maintain the thermal comfort. With the worldwide spread of biological hazards including COVID-19, it has become common to wear a mask as a countermeasure against infection in public places. Because of this influence, it is necessary to take measures against health hazards caused by wearing a mask (increased respiratory load and oxygen poverty due to wearing a mask for a long time, heat stroke in summer).

Comparison Between Key Species Simulated Using the Simplified Indoor Air Chemistry Simulator (SIACS) and Previously Published Values from Reference Models Nicole

People spend approximately 90% of their time within indoor environments, and consequently, characterizing the chemistry of indoor air is valuable from a human health perspective. A simple-to-run indoor air chemistry model is needed as an initial screening tool for public health applications. The Simplified Indoor Air Chemistry Simulator (SIACS), which is currently in development by EPA, incorporates 78 chemical species with 211 chemical reactions and aims to fit this need.

Study on the Indoor Environment and the Health of Elderly in China

In this study, questionnaire survey and field measurement were conducted for the houses with the elderly in urban and rural areas across 6 regions of China, during heating period. As the results, the prevalence of hypertension was found around 40% in both urban and rural areas. In the northern regions, the room temperature in urban residences was stable at around 20°C, and in rural areas this temperature rarely reached 20°C but it fluctuated greatly.

INDOOR ENVIRONMENTS Episode 15 streams on April 4, 2023 [11:00 AM-12:00 PM ET (UTC-5)]

This is a new monthly 60-minute program from ISIAQ/IEQ-GA that is being produced by Healthy Indoors®/IAQNET LLC.
The show is co-hosted by Healthy Indoors’ Founder & Publisher, Bob Krell, and current IEQ-GA President, Donald Weekes. They have real-world experience in a variety of subjects pertaining to the indoor environment, and they are adept at stewarding the conversation to make it both informative and enjoyable.

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INDOOR ENVIRONMENTS Episode 15 streams on January 31, 2023 [01:00-02:00 PM ET]

Indoor Environments: Global Research to Action is a video show & podcast that explores how research can be translated to practice on a variety of topics related to our built indoor environments. The International Society of Indoor Air Quality and Climate (ISIAQ) and the Indoor Environmental Quality Global Alliance (IEQ-GA) have partnered to create this unique show.

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INDOOR ENVIRONMENTS Episode 6 streams on January 21, 2022 [11:00 AM – 12:00 PM EDT]

Indoor Environments is a video show & podcast dedicated to featuring important research that can enhance how we manage our built indoor spaces, hosted by Bob Krell and Donald Weekes. The International Society of Indoor Air Quality and Climate (ISIAQ) and the Indoor Environmental Quality Global Alliance (IEQ-GA) have partnered to create this unique show.

Season-1/Episode-6: An Indoor Air Quality Paradigm Shift – Why, What, and How? will feature Marwa Zaatari and William Bahnfleth.

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INDOOR ENVIRONMENTS Episode 5 streams on November 19, 2021 [11:00 AM – 12:00 PM EDT]

Indoor Environments is a video show & podcast dedicated to featuring important research that can enhance how we manage our built indoor spaces, hosted by Bob Krell and Donald Weekes. The International Society of Indoor Air Quality and Climate (ISIAQ) and the Indoor Environmental Quality Global Alliance (IEQ-GA) have partnered to create this unique show.

Season-1/Episode-5, with Karen Dannemiller and Brandon Boor, will discuss indoor exposure to chemicals and microbes via dust and resuspension.

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INDOOR ENVIRONMENTS Episode 4 streams on October 15, 2021 – 11:00 AM – 12:00 PM EDT

Indoor Environments is a video show & podcast dedicated to featuring important research that can enhance how we manage our built indoor spaces, hosted by Bob Krell and Donald Weekes. The International Society of Indoor Air Quality and Climate (ISIAQ) and the Indoor Environmental Quality Global Alliance (IEQ-GA) have partnered to create this unique show.

Season-1/Episode-4, with Cheri Marcham, will discuss the ACGIH Bioaerosols Book, 2nd Edition, and the ACGIH Bioaerosols Committee’s Activities.

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INDOOR ENVIRONMENTS Episode 3 streams on August 27, 2021 – 11:00 AM – 12:00 PM EDT

Indoor Environments is a video show & podcast dedicated to featuring important research that can enhance how we manage our built indoor spaces, hosted by Bob Krell and Donald Weekes. The International Society of Indoor Air Quality and Climate (ISIAQ) and the Indoor Environmental Quality Global Alliance (IEQ-GA) have partnered to create this unique show.

Season-1/Episode-3, with Charles Weschler and Glenn Morrison, looks at how occupants themselves affect our indoor environments.

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