Calculation Services

Thermal Performance Calculations

The insulated INDU LIGHT ELS systems impress with outstanding U-values and ensure maximum energy savings through effective thermal insulation. Even small improvements make a big difference. Rule of thumb: For every 0.1 W/m²K improvement in the U-value, you save about one liter of heating oil per square meter of continuous rooflight—year after year.

Do the math yourself: Select the desired glazing type, enter your current heating oil or gas price, and immediately see your individual annual heating cost savings.

Go to the energy savings calculator

Daylight Calculations

Daylight achieves a much higher illuminance than artificial light. The bright zenithal light provided by skylights requires about five times less glazing area than horizontal daylight from windows to achieve the same illuminance.

INDU LIGHT develops daylighting concepts that take specific requirements and regulations into account. In accordance with the DIN 5034 series of standards, “Daylight in Interior Spaces,” we determine your daylight requirements for the entire building. To do this, INDU LIGHT uses a specially developed lighting calculation tool as well as the FastCalc program—the daylight program of the Fachverband Tageslicht und Rauchschutz e.V. (FVLR).

Custom Ventilation Designs & Calculations

Whether it’s a bakery, industrial facility, or warehouse—the requirements for optimal ventilation vary significantly depending on the building’s use. Our specially trained experts provide comprehensive consultation, explain applicable regulations, and prepare precise ventilation calculations for your building.
We rely on three proven approaches for designing custom ventilation systems:

• Based on fast air exchange rates – for targeted control of fresh air and exhaust air
• According to Workplace Directive ASR A3.6 (Part 5) – to ensure compliance with labor law requirements
• Based on heat loads – for efficient regulation of room temperatures and energy consumption

Smoke and Heat Exhaust System Calculations

INDU LIGHT designs, supplies, and installs custom-sized smoke and heat exhaust systems (SHE), precisely tailored to the requirements of your building. During the planning phase, we take into account all relevant design standards and guidelines—including DIN 18232, VdS 2098, industrial building codes, and TRVB S 125 (Austria). Fire safety requirements for roof penetrations and fire spread protection in accordance with DIN 18234 are, of course, also incorporated into our project planning.

We provide comprehensive support in the design of your smoke and heat exhaust ventilation system and handle all calculations—precisely, in compliance with standards, and free of charge. Upon request, we also determine the required daylight ratio in accordance with DIN 5034 Part 6 and prepare a smoke and heat exhaust calculation in accordance with DIN 18232 Part 2 or VdS 2098.

Structural Calculations & Approvals

Our continuous rooflights come standard with structural calculations for wind suction loads up to 0.80 kN/m² and snow loads up to 3.50 kN/m². All NRVD systems (natural smoke and heat exhaust devices) are tested for a snow load of 500 N/m² and a wind load of 1,500 N/m².

Higher load ratings are available upon request—we would be happy to advise you on individual structural requirements and custom solutions.

Sound Insulation Calculations

The ELS system from INDU Light boasts a certified soundproofing value of up to 33 dB, thereby meeting the strict requirements of the Federal Immission Control Act (BImSchG) and the Technical Guidelines on Noise Protection (TA Lärm). These guidelines establish binding limits to protect the public from the effects of noise.

We would be happy to provide you with information on additional sound insulation options and customized solutions for your continuous rooflight.