Articles

Illuminance measurements for indoor workplaces

Professional illuminance measurements help determine whether lighting conditions meet the requirements applicable to a particular space and visual task. The assessment should be based on defined criteria rather than visual impression alone. Why is...

The g-value of windows: total solar energy transmittance

The total solar energy transmittance of glazing, commonly called the g-value, is an important parameter in energy-efficient building design. It indicates the proportion of incident solar energy that enters the interior through the glazing, both di...

TVOC measurements: how aerosols affect indoor air readings

Indoor air quality affects the comfort of people using a room and can be relevant to health assessments. One group of parameters used to investigate indoor air is volatile organic compounds (VOCs). A sensor may report a combined indicator as TVOC ...

How to bleed a radiator: signs, steps and safety checks

Air trapped in a radiator can reduce water circulation and cause uneven heating. Bleeding a radiator is often a straightforward maintenance task, but the correct procedure depends on the heating system and radiator type. If you are unsure, if the ...

Reactive power compensation: measurements, charges and system selection

Businesses with significant electrical loads often review reactive energy when looking for avoidable network charges and inefficient use of connection capacity. Reactive power is an essential part of many alternating-current systems, but excessive...

ZIELONY DOM certification: what it is and how the process works

Sustainability criteria play an increasingly visible role in residential property development. Investors and developers assess not only design and functionality but also energy use, resource management, the quality of the indoor environment and th...

Location of leaks using an ultrasonic (acoustic) camera

Diagnostics in industry and construction has advanced tools and methods that allow rapid and precise detection of various types of defects. One of the innovative tools used in this field is the ultrasonic (acoustic) camera. These devices make it...

Green Building Standard (GBS): scope, criteria and certification process

Green Building Standard (GBS) is a Polish building-certification system organised by the Polish National Association for Supporting Sustainable Building (OSWBZ). Its published framework focuses on the quality of the indoor environment, user comfor...

HQE certification: framework, commitments and process

HQE is a family of certification frameworks originating in France and applied to buildings, districts and infrastructure. Depending on the certification product, it can cover new construction, renovation and assets in operation. The current HQE r...

Thermal imaging in buildings, industry and medicine: uses and limitations

Thermal imaging is used in building diagnostics, industrial maintenance and a number of specialist fields. A thermal camera records infrared radiation emitted by a surface and converts it into a thermogram: an image showing the apparent temperatur...