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Posts Tagged ‘indoor air quality (IAQ)’

May 21, 2021

Can only 12 parameters evaluate the IEQ in buildings?

What are IEQ and TAIL? The indoor environmental quality (IEQ) is a general indicator of the quality of conditions inside a building. IEQ can be defined and determined by various physical and psychological aspects of life indoors, such as thermal comfort, air quality, lighting quality and acoustic conditions, and others. Although there are several approaches […]...

AUTHOR: Petra Vladykova Bednarova

February 26, 2021

Relative humidity as the main signal for comfort indoors!

Requirements for relative humidity! Humidity definition dates back to the 1300s and is widely proved to be one of the important factors in buildings. Together with temperature, relative humidity is…...

AUTHOR: Petra Vladykova Bednarova

November 26, 2020

We spent 90% time indoors! Who said it?

The very much-quoted statistics: 90% time indoors! Surprisingly there were many studies performed at the 20th-century gathering human activity patterns and human exposure data. And one marginal study was published…...

AUTHOR: Petra Vladykova Bednarova

October 16, 2020

Why do we ventilate?

Have you ever wondered why do we ventilate our houses? Throughout history, humans always looked for better living conditions and healthier air. For the past several decades, indoor air quality…...

AUTHOR: Petra Vladykova Bednarova

October 25, 2019

New case study added! Vaasa Vocational Institute in Finland!

Are you interested in real proof that DCV system is working? Do you like to have scientific proof that the ventilation systems installed in real buildings are working? Do you…...

AUTHOR: Petra Vladykova Bednarova

July 24, 2018

Health and well-being in indoor environment!

Our environmental requirements: Health, well-being and indoor environment! Human physiology is not adapted to the climatic conditions in temperate and polar latitudes, although parts of these regions have been populated…...

AUTHOR: Petra Vladykova Bednarova

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February 3, 2017

Why do we warm up the house?

Heat balance and indoor air quality Heat balance means that when all the “free heat” given off by people, appliances and solar radiation is not enough to provide comfortable indoor…...

AUTHOR: Petra Vladykova Bednarova

July 21, 2016

We are able to “design tight”! We haven´t yet learned to “ventilate right”!

New homes rarely performs as well as their designers expect. Findings from Innovate UK´s four-year Building Performance Evaluation (BPE) shows that on average non-domestic buildings use 3,6 times more energy…...

AUTHOR: Petra Vladykova Bednarova

July 20, 2016

How satisfied are you with indoor air quality in your home after renovating it? How often do you air your house if you don´t have a mechanical ventilation?

Some interesting points from a work on renovation of apartment buildings and results from investigation of indoor air quality. The occupants indicated to be more satisfied with the IAQ before…...

AUTHOR: Petra Vladykova Bednarova

July 13, 2016

Airing of the apartments before and after renovation! Energy renovation without additional ventilation is not enough!

The energy use in the existing residential sector that was built in the second half of 20th century is considered a serious problem across the European Union. The current focus…...

AUTHOR: Petra Vladykova Bednarova

July 8, 2016

How often do you open your window? Do you vent enough?

I found another source that confirms my worry about occupants´ health in renovated apartments. It is nice to save energy and money when you renovate the apartment building that you…...

AUTHOR: Petra Vladykova Bednarova