Building Automation with HVAC Library for CODESYS©

Comfortable and Hardware-independent programming

We develop modules for the Codesys development environment.

Advantages of HVAC by Pfänder

Comfortable programming of Heating Ventilation and Air Conditioning systems
Ready-to-use FBs and visualization macros with HTML5
Hardware-independent (PLCs/IOs)
Training and technical support
Fast and efficient

Products offered by HVAC

HVAC Building & Process Automation SL

90,00 €

Automation with CODESYS®  3.5

HVAC (Heating Ventilation and Air-Conditioning) HLK ("Heizung Lüftung Klima" - German Description) Function blocks and HTML5 visualization.
Automate and visualize your entire building technology professionally and hardware-independently: air-handling units, heat production, heating circuit distribution, individual room control, room automation, light and shade control. 

Without license purchase (download only) the HVAC Building and Automation Library SL works for 30 minutes without functional limitations (demo). To purchase a license, you must register at the CODESYS®  Store.


The product HVAC Building & Process Automation SL contains function blocks and HTML5 macros for the complete heating, ventilation and air conditioning section, but also for room automation and other industrial plant technology. There is an advantage especially in the comfortable programming and the  hardware independence[nbsp]of controls and EA groups. Extensions such as MySQL Library, I/O drivers and many more enable the user to cover the requirements in a modular way. The product portfolio is constantly being expanded with new functions, products and communication connections for common bus systems. Extensive training, support and individual services for software development complete the offer.

Benefit from 30 years of experience in building automation: Practical development of this library is our claim.

Decide for yourself on which controller you want to run your application - simple, inexpensive automation tasks on a Raspberry Pi with full functionality or professional, fail-safe automation tasks on other controllers - industrial PC or a controller from around 350 manufacturers which are listed in the CODESYS device directory

Detailed Wiki here




Training „CODESYS and HVAC Basics“


Take advantage of our free basic training! We will show you in a websession how you can program with CODESYS and our HVAC library. Together we thus create small programs and HTML 5 visualisations.At the end, we will parameterise controllers at the in-house complete air conditioning RLT facility and make changes! Use the expertise of our programmers to answer your questions - we look forward to seeing you. For you, participation is completely free!

Products we are working on

AlarmMessage Tool Library SL

Easily create alarm policies, recipient lists and much more within the visualization. Monitoring of the policies and automatic e-mail transmission with predefined alarms in CODESYS. The library also includes a Visu macro!

For further information please contact us!

Submit request

HVAC Macro Library SL

HVAC macros for use with the HVAC library.

For further information please contact us!

Submit request

HVAC Features Library SL

Extension of the HVAC library with help modules for various conversions as well as simple SEND and RECEIVE modules for communication between CODESYS controllers.

For further information please contact us!

Submit request

EnOcean Library SL

Simple programming of EnOcean subscribers; requires a supported EnOcean gateway.

For further information please contact us!

Submit request

KNX Library SL

Transmission and reception of group addresses in an existing KNX network in combination with a supported KNX TCP gateway.

For further information please contact us!

Submit request

M-Bus Library SL

Supports the function of querying M-Bus subscribers directly from CODESYS. Requires a supported M-Bus Gateway.

For further information please contact us!

Submit request

MP Bus Library SL

Communication with MP Bus devices of the company Belimo directly from CODESYS. Requires a supported MP Bus Gateway.

For further information please contact us!

Submit request


Technical Training

We offer individual technical-trainings for your team at your office or at our facilities.
Courses are held in small groups, and the content of the courses are deepened with examples.

Some contents are; Working with the CODESYS Development environment, How to use the HVAC-Library or training and support in individual macro and library creation.

We also support you with on-site appointments.

Contact us!


To get easily started, we also offer you an documentation section and a Youtube Channel. There are some Step-to-Step Guides to get started with.

The offer is constantly being extended!





Consulting / Support

We are committed to software products with detailed documentation and support. Therefore, in addition to the documentation of the individual components in the CODESYS library, we have also created an online wiki and YouTube videos. This provision is constantly expanding!

Start with personal consulting instead of the „Trial and error“ method! We offer you a remote consulting solution to start your project efficient. Questions can be directly answered by reviewing the project source code from your desktop. You only get charged for the time we need for solving the problem or answering your questions.

Simply buy a support ticket via the PayPal button and get in touch with our developers. It is envisaged that the joint processing of a ticket will basically require a time frame of 1 hour. We are also happy to make you an offer - you can then easily pay against invoice.


Buy support ticket:

Custom Solutions

Solutions perfectly tailored to your needs


Do you have special requirements or individual needs? But you don’t have enough resources or a deficit in knowledge to handle it? Then we’re the partner you’re looking for! Our experienced software developers will support you in realising your project. 

Obtain a quote

You have questions?

We will gladly answer them.

oder Tel. 07958 - 9800-0