Physics-Based HVAC System Design, Simulation & BIM Integration Software

The HVAC simulation and calculation software, to streamline your design process and optimise your building's heating, cooling and air handling installations. Take actionable steps towards greener zero carbon initiatives.

Screenshot of Hysopt HVAC engineering software interface displaying energy simulation, system validation, and digital twin modelling for heating and cooling systems.

Trusted by HVAC industry leaders worldwide

Meet our customers

Deliver Optimal HVAC Systems While Improving Your Margins

Hysopt HVAC Software in 170 seconds

In a market demanding decarbonisation, cost control, and design certainty, Hysopt empowers HVAC professionals to:

Simulate and validate system performance before installation with Hysopt Simulator, using dynamic HVAC digital twins to test system behaviour in real-world conditions.

Design energy-efficient systems with Hysopt Designer, combining P&ID modelling and hydraulic validation to reduce CO₂ emissions and optimise flow, temperature, and sizing from the start.

Select components and automate commissioning using Hysopt Calculator to streamline technical design tasks like pipe sizing, valve selection, partial load analysis, and BOM export.

Synchronise HVAC calculations with BIM models via Hysopt BIM Syncer, ensuring alignment between engineering intent and BIM workflows—reducing rework and improving coordination.

By shifting HVAC design from component-level thinking to system-wide simulation and validation, Hysopt helps you predict, compare, and prove performance—before a single component is installed.

Hysopt gives HVAC engineers an edge.

38%
average cut in design-review hours per project
25%
higher bid-win rate on complex HVAC tenders
45%
faster commissioning & client sign-off

By HVAC Engineers, for HVAC Engineers

No compromises on complexity

We model the most demanding HVAC systems—thermal, hydraulic, or hybrid—without overwhelming the user. Complexity is handled behind the scenes so you can focus on performance.

Completely tailored to your needs

Built by HVAC experts with experience across 450+ real-world projects. Our tools are purpose-built to support your design and commissioning workflows, every step of the way.

Covering the whole engineering chain

From initial system concept to commissioning and site handover, Hysopt supports the full lifecycle of HVAC design with simulation, calculation, and validation.

Direct access to expert HVAC knowledge

Work with engineers who’ve been in the field. Gain insights, best practices, and ongoing training directly from qualified HVAC specialists and educators.

Hear from our customers

Tekst

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"What personally convinced me was the ability to compare multiple system concepts side by side and simulate them dynamically using a Digital Twin."

Dennis Hofmann
Engineer at Schermer Installatietechniek

"Hysopt significantly streamlined our workflow, with its advanced simulation capabilities producing more reliable and detailed results, simplifying both internal processes and communication with our clients."

Moises De Alba
Principal at FirstLight Energy

"The added value of Hysopt lies in its ability to optimize all parts of the hydronic systems and provide all insights needed over the full range of operation."

Francisco Contreras
Manager at HH Angus

"With the Hysopt software, we have saved 50% on commissioning time thanks to the presets and setpoints being automatically calculated."

Maik van Tilburg
CEO at Van Tilburg Energie Design

"Thanks to Hysopt, we're now witnessing consistently high-quality designs emerging from the design team, revolutionising our approach to projects and enhancing our reputation."

Laura Bishop
Director at HI Group, GSHPA Chair

"The greatest benefit of using Hysopt is its ability to eliminate uncertainties, allowing us to efficiently and effectively identify and address all system issues."

Steve Morris
Head of Maintenance at Insite Energy

"With Hysopt, you can simply change small details in a system and have the software automatically resimulate everything, cutting down design time massively."

Charlie Pattison
Head of Engineering at Cenergist

"Using Hysopt, we can design our installations more effectively, which will lead to fewer malfunctions in the long run, reducing the need for our maintenance team to step in."

Robert Chambon
Team Lead Engineering at Van Delft Groep