User Data Privacy Protection Notice

We at Keller Lufttechnik GmbH + Co. KG are very pleased with your interest regarding our company. The protection of your personal data is of vital importance to our management.

This data privacy notice is to inform you of the types, scope and purpose of personal information that is collected, used and processed by us.

We adopted a number of technological and organizational measures to ensure the maximum protection of personal data that is processed via this internet page. We use an SSL / TSL coding for safety reasons and to protect private content during the processing of inquiries submitted by you via the contact application form. You will recognize the transmission coding when the address in your browser changes from “http: to https:” with a lock symbol in your browser line. When the SSL/TSL coding is activated, the information that you are sending to us cannot be accessed by a third party. Nevertheless, internet-based data transmissions might still contain security gaps. Absolute protection of personal data cannot be guaranteed.  This is why you may feel free to provide your personal information to us by using an alternate means such as a phone call.


According to data protection law, the responsible party is:

Keller Lufttechnik GmbH + Co. KG
Neue Weilheimer Straße 30
73230 Kirchheim unter Teck

Fon: +49 7021 574 0

The data protection officer is:
Matthias Haußer
Keller Lufttechnik GmbH + Co. KG
Neue Weilheimer Straße 30
73230 Kirchheim unter Teck

Fon: +49 7021 574 0

Individuals having any concerns may contact our data protection officer at any time regarding all questions and suggestions relating to data protection.

We collect and automatically store information in our server log files that your browser is automatically sending us. These are:

  • Browser type and version
  • Operating system in use
  • The internet page from which you access our internet page  (known as Referring URL)
  • Each page viewed 
  • Host name of your computer
  • Date and time of server request
  • Your IP address
  • Your internet service provider (ISP)
  • Other similar data and information that will be used for emergency notification in the event of a breach of our information technology systems.  

When gathering this general data and information, we do not form opinions regarding you. Rather, this information is important to us in order to:

  • provide accurate content in our internet pages,
  • optimize the content of our internet pages and advertising,
  • ensure the durable functionality of our information technology systems and the strategy of our web pages, and
  • furnish vital information to enforcement agencies in the event of a cyberattack.

The basis for data processing is the German Regulation: Art. 6, Par. 1, lit. b DSGVO, which permits the processing of data required for the necessary steps in order processing or contract fulfillment.

Your IP address will be automatically deleted after one week. 

Our web page gives you an opportunity to subscribe to our newsletter free of charge. During registration for the newsletter, your input data (name, e-mail address) is transmitted to us.

Our periodic newsletter informs subscribers, customers and business partners about our various offers. The newsletter is sent to you only if you (1) have a valid e-mail address, and if (2) you have requested it. For legal purposes, a confirmation e-mail with a double Opt-In process is sent to the e-mail address you provide us when requesting our newsletter. This confirmation e-mail is to verify ownership of the e-mail address authorizing receipt of our newsletter. 

When you subscribe to our newsletter, we further store your IP address, with the date and time of registration. Collection of this data is necessary for transparency reasons in the event of a potential fraudulent misuse of the e-mail address at a later time. This is for our own legal protection.
Personal data collected within the framework of registration for the newsletter is used only for sending the newsletter. Collection of any other personal data during registration is used to prevent the fraudulent use of this service or your e-mail address.

Additionally, subscribers may be informed via e-mail during the newsletter subscription or the registration for it, when there are updates to newsletter offers or to provide advance notice of upcoming engineering changes. Any personal data collected within the framework of our newsletter service is processed according to instructions by GTC Gutacker TeleCommunication GmbH, Zimmermannstr. 15, 70182 Stuttgart. Personal data collected from the newsletter service is not shared with third parties.

You may cancel your subscription to our newsletter at any time. Your approval to store your personal data that you provided us for subscription purposes can be revoked by you at any time.  Each newsletter provides a link for cancellation. In addition, it is possible to terminate your subscription to our newsletter directly by using our internet pages, or you may feel free to inform us by any other means.

The legal basis for the processing of data following subscription to a newsletter is the German Regulation: Art. 6, Par.1, lit. a DSGVO.

The data is deleted once it is no longer necessary for achieving the intended purpose of its collection. Your e-mail address is stored as long as your subscription to the newsletter remains active.

Pursuant to legal requirements, our internet page includes information that allows rapid electronic connection to our company and direct communication with us by e-mail. If you contact us by e-mail or via our coded contact form, the personal data transmitted by you is automatically stored. Such voluntary personal data is stored solely for the purposes of processing your inquiry or for contacting you. No personal data is shared with third parties.

The legal basis for the processing of newsletter subscription data is the German Regulation: Art. 6, Par. 1, lit. f, or possibly lit. b DSGVO.

The data you have entered into our contact form will remain with us until you request us to delete it or until the purpose for the data has expired, (e.g., after the processing of your inquiry or sales contract is complete). Legal regulations such as mandatory retention periods remain unaffected.

We collect and process personal data from applicants for the sole purpose of processing the application. Processing can also occur electronically, especially when application documents  are transmitted via e-mail or via the form provided on our web page.

If we agree to an employment contract with an applicant, the transmitted data is stored for the purpose of processing the employment as specified by legal regulations. If there is no employment contract, the application documents will be deleted automatically 2 months after notification of rejection, provided said deletion is not counter to any other legally justifiable interests of our company. A legally justifiable interest in this context would be, for example, for providing proof of compliance with the General Equality Act (AGG). In this case, the application documents are stored for 6 months.

The legal basis for processing of application information is German Regulation: Art. 88 DSGVO in connection with § 26 BDSG.

Our internet page utilizes Google Analytics (with anonymous function). Google Analytics is a web analysis service of Google Inc., 1600 Amphitheatre Pkwy, Mountain View, CA 94043-1351, USA.

Google Analytics operates with text files that are stored in your unit (known as cookies). Data is collected about what internet page provided access to our internet page (known as referrer), which subpages were viewed, and how frequently and for how long our internet pages were viewed.

This data is automatically transmitted with each connection to a Google server in the USA and stored there. No data regarding you will be combined with other data already stored at Google.  However, Google may potentially share this collected personal data with third parties.Google uses this information on our behalf to provide us with an analysis of website usage, website activities, and other services. This helps us to optimize our website.

We use the masking function „anonymize IP“. Prior to transmitting your IP address to the Google servers in the USA, it will be abridged inside the EU. A transfer of the original IP address rarely occurs, and it is then abbreviated on servers in the USA.

Note on the processing of your data collected on this website in the USA by Google, Facebook, LinkedIn, YouTube: By agreeing to the use of these cookies, you also consent to your data being processed in the USA (Art. 49 Paragraph 1 Clause 1 lit. a GDPR). The US is assessed by the European Court of Justice as a country with an inadequate level of data protection according to EU standards. In particular, there is a risk that your data may be processed by US authorities for control and monitoring purposes, possibly even without the possibility of redress.

You can prevent this process by taking the following measures:

  • Prevent the use of cookies by our internet page at any time by using a special setting on your internet browser, and thus the long-term prevention of cookies.
  • An already placed cookie can be deleted by Google Analytics via the internet browser or other software
  • Adapt your cookie settings on this site
CookieConsentSaves your consent to using cookies.1 yearHTMLKeller Lufttechnik
_gaUsed to distinguish users.2 yearsHTMLGoogle
_gatUsed to throttle request rate.1 dayHTMLGoogle
_gidUsed to distinguish users.1 dayHTMLGoogle
_ga_*Persists session state.2 yearHTMLGoogle
_gac_*Contains campaign related information for the user. If you have linked your Google Analytics and Google Ads accounts, Google Ads website conversion tags will read this cookie unless you opt-out.3 monthsHTMLGoogle

Additional information and current data protection regulations at Google can be viewed at: and under Google Analytics is explained in detail at:

We have a legitimate interest in the use of Google Analytics which is in predominant use. There is minimal access via the anonymous page design and less interference into the right to personal privacy (see Art. 6, Par. 1, lit. f DSGVO).

On our webpages, we use Google Maps to provide you with local contact information, such as “contact person Germany”. Google Maps is a service of Google Inc., Amphitheatre Parkway, Mountain View, CA 94043, USA.

When using Google Maps it is necessary to store your IP address. This information is, as a rule, transmitted to a Google server in the USA and stored there. We do not have any power over this data transfer.

The use of Google Maps is in the interest of an attractive presentation of our online offers and for ease of locating sites mentioned on our web pages. This constitutes a legitimate interest within the context of Art. 6, Abs. 1 lit. f DSGVO.

Note on the processing of your data collected on this website in the USA by Google, Facebook, LinkedIn, YouTube: 
By agreeing to the use of these cookies, you also consent to your data being processed in the USA (Art. 49 Paragraph 1 Clause 1 lit. a GDPR). The US is assessed by the European Court of Justice as a country with an inadequate level of data protection according to EU standards. In particular, there is a risk that your data may be processed by US authorities for control and monitoring purposes, possibly even without the possibility of redress.

For more information on the handling of user data, please see the data protection statement from Google at:

Please see for our own facebook fanpage (“Fanpage”) by which you can contact us and leave comments as well. Personal data such as your name is used to reply to your inquiry or comments.

When you visit us by the fanpage, Facebook Ireland Ltd., 4 Grand Canal Square, Grand Canal Harbour, Dublin 2, Irland („Facebook“) uses your IP address or the page from which you have activated the fanpage (so-called referrer-URL). This also happens if you do not have an own facebook account and just read our fanpage. Details of personal data that are processed by facebookk are mentioned on facebook’s  data guideline under . According to a judgment of the European Court of Justice from June 05, 2018 (reference C-210/16) there is a common responsibility between fanpage providers like us and facebook for so-called insights data. Insights data are collected personal data relating to a visit or interaction of persons on / by a fanpage and its content.

To meet the common responsibility according to the jurisdiction of the European Court of Justice there is a special agreement between facebook and us. For details please see
The vested right for you according to the data protection law can be claimed according to Art. 26 Abs. 3 DS-GVO (facebook or us). Details about your rights are mentioned under “your rights”.

You have the right:

  • to demand information about any personal data processed by us, in accordance with  Art. 15, DSGVO.  In particular, you can request information about the purpose of the use of your personal data, types of recipients to whom your data was disclosed, the planned retention period, the right to correct, delete, or restrict access to your data , the right to request the source of your data if it was not collected by us, and demand the specifics of any automated decision- making functions such as customer profiling,  as well as any other material information;
  • to request the immediate correction of any erroneous personal data stored by us, in accordance with Art. 16 DSGVO;
  • to demand, according to Art. 17 DSGVO, the deletion of personal data stored by us, unless it is required by us for the purposes of exercising the right of freedom of expression or information, to fulfill any legal obligations that may be in the public interest, or for the assertion, execution or in defense of any legal claims;
  • to restrict the processing of your data according to Art. 18 DSGVO – if the accuracy of the data is denied by you, if the processing was illegal but you refuse its deletion because you need it in order to assert, execute or defend your legal rights, or if you have filed an objection according to Art. 21 DSGVO;
  • to request your personal data that you have provided to us, in a structured, common and machine-readable format,  according to Art. 20 DSGVO,  or to request transmission to another responsible party;
  • to revoke a previously submitted approval at any time, according to Art. 7 Abs. 3 DSGVO. This means that we must discontinue processing data which is based upon a previous approval, and
  • according to Art. 77 DSGVO – you have the right to lodge a complaint with a supervisory authority. As a rule, you may contact the supervisory authorities for your place of residence, for your workplace, or for our headquarters site.

If your personal data is processed on the basis of a legitimate interest according to Art. 6 Abs. 1 S. 1 lit. f DSGVO, you retain the right – according to Art. 21 DSGVO – to enter an objection against the processing of your personal data, provided there are valid reasons relating to a special situation, or if you object to any form of direct mail advertisement. In the latter case, you have a general right to enter an objection which is executed by us without you having to divulge your particular situation.

If you wish to exercise your right to lodge a complaint, please send an e-mail to