Imprint and Data Privacy

Responsible for the content on according to the German Press and Media Services ActDr.-Ing. Manuel Gräber
TLK Energy GmbH, Heinrichsallee 41, 52062 Aachen, Deutschland/Germany
Phone. +49 241 41250645 / E-Mail. info@tlk-energy.deContentTLK Energy does not guarantee the correctness, completeness or quality of the information provided. TLK Energy cannot take responsibility regarding damage caused by the use of any information provided, including any kind of information which is incomplete or incorrect. Liability claims will therefore be rejected. All offers are not-binding and without obligation. Parts of the pages or the complete publication including all offers and information might be extended, changed or partly or completely deleted by TLK Energy without notice.
Referrals and linksTLK Energy is not responsible for any contents linked or referred to from his pages - unless the author has full knowledge of illegal contents and would be able to prevent the visitors of his site from viewing those pages. If any damage occurs by the use of information presented there, only the author of the respective pages might be liable, not the one who has linked to these pages. Furthermore the author is not liable for any postings or messages published by users of discussion boards, guestbooks or mailinglists provided on his page.
CopyrightTLK Energy intends not to use any copyrighted material for the publication or, if not possible, to indicate the copyright of the respective object. The copyright for any material created by the author is reserved. Any duplication or use of objects such as diagrams, sounds or texts in other electronic or printed publications is not permitted without the author's agreement.
PrivacyThe operators of these pages take the protection of your personal data very seriously. We treat your personal data confidentially and according to the legal data protection regulations as well as this data protection explanation.

Visiting and viewing our website is generally possible without providing personal data. We would like to point out that data transmission on the Internet (e.g. communication via e-mail) can be subject to security gaps. A complete protection of the data against access by third parties is not possible.
CookiesSome of the Internet pages use so-called cookies. Cookies do not damage your computer and do not contain viruses. Cookies serve to make our offer more user-friendly, more effective and safer. Cookies are small text files that are stored on your computer by your browser.

Most of the cookies we use are so-called 'session cookies'. They are automatically deleted at the end of your visit. Other cookies remain stored on your terminal until you delete them. These cookies enable us to recognize your browser during your next visit.

You can set your browser so that you are informed about the setting of cookies and only allow cookies in individual cases, accept cookies for certain cases or generally exclude them and activate the automatic deletion of cookies when closing the browser. If cookies are deactivated, the functionality of this website may be restricted.NewsletterContent:
With our newsletter we keep you up to date on current developments at TLK Energy, such as software products, new blog entries, upcoming events and projects. The focus is on the topics of simulation and optimization of thermal and energy systems.

Legal basis:
Newsletters are sent out on the basis of the consent of the recipients (Art. 6 Para. 1 S. 1 lit. a. DSGVO) or, if consent is not required, on the basis of our legitimate interests in direct marketing (Art. 6 Para. 1 S. 1 lit. f. DSGVO), if and to the extent that this is permitted by law, e.g. in the case of advertising to existing customers.

To subscribe to our newsletter, it is generally sufficient to provide your e-mail address. You can also enter your name so that we can address you personally in our newsletter. Through the registration system with an additional confirmation message containing a link to the final registration (double opt-in), we ensure that the newsletter is desired by you.

You can cancel the receipt of our newsletter at any time or object to your consent to the storage of your data. You will find a link for cancellation at the end of each newsletter. Alternatively, you can unsubscribe from the newsletter via other contact options (e.g. by e-mail).

Scope of data processing:
The registration for the newsletter is logged in order to be able to prove the registration process in accordance with the legal requirements. This includes the storage of the registration and confirmation time as well as the IP address. Changes to your data stored by the delivery service provider are also logged. Our newsletter contains so-called tracking pixels, which enable us to recognize whether and when the newsletter was opened and which links in the newsletter were clicked on. This analysis data is stored by the dispatch service provider and made available to us.

Deletion and restriction of data processing:
The data will be deleted as soon as they are no longer required for the purpose of their collection. Your data will therefore be stored for as long as you have subscribed to our newsletter. We may store the unsubscribed e-mail addresses on the basis of our legitimate interest before we delete them in order to be able to prove a previously given consent. The processing of this data is limited to the purpose of a possible defense against claims. An individual request for deletion is possible at any time, provided that the former existence of a consent is confirmed at the same time. In case of obligations to permanently observe contradictions, we reserve the right to store the e-mail address in a so called "blacklist" for this purpose alone.

Service provider:
We use the newsletter software MailChimp (Website; Privacy Policy) for the creation, dispatch, analysis and administration of the newsletter.
etrackerThe provider of this website uses the services of etracker GmbH, Hamburg, Germany ( to analyse usage data. We do not use cookies for web analysis by default. If we use analysis and optimisation cookies, we will obtain your explicit consent separately in advance. If this is the case and you agree, cookies are used to enable a statistical range analysis of this website, a measurement of the success of our online marketing measures and test procedures, e.g. to test and optimise different versions of our online offer or its components. Cookies are small text files that are stored by the Internet browser on the user's device. etracker cookies do not contain any information that could identify a user.

The data generated by etracker on behalf of the provider of this website is processed and stored by etracker solely in Germany by commission of the provider of this website and is thus subject to the strict German and European data protection laws and standards. In this regard, etracker was independently checked, certified and awarded with the ePrivacyseal data protection seal of approval.

The data processing is based on Art. 6 Section 1 lit f (legitimate interest) of the General Data Protection Regulation (GDPR). Our legitimate interest is the optimisation of our online offer and our website. As the privacy of our visitors is very important to us, the data that may possibly allow a reference to an individual person, such as IP address, registration or device IDs, will be anonymised or pseudonymised as soon as possible. etracker does not use the data for any other purpose, combine it with other data or pass it on to third parties.You can object to the outlined data processing at any time. Your objection has no disadvantageous consequences.

Further information on data protection with etracker can be found here.

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Objection to advertising emailsWe hereby object to the use of contact data published within the scope of the imprint obligation to send unsolicited advertising and information material. The operators of this website expressly reserve the right to take legal action against unsolicited mailing or e-mailing of spam and other similar advertising materials.


Fresh air with simulation

Find the perfect ventilation concept for your rooms

The air quality simulator aerosim by TLK ENERGY enables you to optimize room air quality and minimize heating costs.

The Aerosim Air Quality Simulator

Know when the air is gone

The quality of indoor air decreases rapidly after a short time, especially in crowded offices and classrooms, but also in bedrooms. Intensive window ventilation, however, means large heat loss and, especially in winter, high energy costs.

Aerosim allows you to calculate how often you should ventilate to keep the CO2 level in the room low. In doing so, you always have the heating costs in view. By comparing different ventilation concepts you will find your ideal system. You can then assess whether it is worth installing a comfortable and energy-saving ventilation system.

Your benefits

Quick and easy calculation of indoor air quality

Easy to use

Enter all necessary data into the calculator with a few simple clicks.

Quick results

Hit the ground running! aerosim only needs a few seconds to do the calculation.

Detailed diagrams

Obtain all important data from detailed diagrams.

Compare concepts

Test different ventilation options and find the right one.

Calculation of cost savings

Find out whether you can save money with a new ventilation concept.


How do you measure air quality?

An indication of good or bad air quality is the amount of CO2 in a room. It is measured in ppm ("parts per million"). According to the Federal Environment Agency of Germany, a room should be aired if the level exceeds 1,000 ppm. If 1,500 ppm are exceeded over a longer period of time, fatigue, headaches and lack of concentration increase. A high concentration of CO2 also indicates the accumulation of pollutants and pathogens in the air.

Get the result in just 4 steps

How the air quality simulator works

2. Simulate the ventilation concept

Choose how often, how long and in which way you want to ventilate the room. Available options are manual window ventilation and a controlled ventilation system. After defining the ventilation type you can simulate right away!

3. Immediately get results

In addition to an overview of the air quality, detailed diagrams of the CO2 content and the ventilation phases are available. This allows you to see immediately how the air quality changes during room use and, if necessary, to reconsider your ventilation concept.

1. Build your room

Define your room and specify the occupancy with a few input values. The visualization helps you to avoid input errors and guides you through the configuration.

4. Compare different ventilation concepts

The comparison feature allows you to directly see the advantages and disadvantages of different ventilation concepts. In addition, we provide you with an overview of the costs you may incur due to heat loss from ventilation.  

Test your ventilation concept now

The air quality simulator is free.


Modern tools for development and sales

Individual web simulators for your technical system

We plan, design and program web apps for the simulation of technical systems. With the graphical user interface, you can easily simulate ventilation systems, heat pumps, thermal storages or any other kind of technical system. The ideal solution for the use in your development and sales teams, and to promote your products.

Contact us now for a consultation. Fill out the contact form, write an email to or call us at +49 241 412 50 645.


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