Design HVAC systems right the first time

Hysopt helps HVAC engineers simulate, validate and optimise complex hydronic systems before they are built — reducing design risk, oversizing and performance issues.

See how Hysopt works on real HVAC design challenges.

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

Trusted by HVAC engineering teams and consultants worldwide

Proven impact on HVAC system performance

Use simulation to compare concepts, validate performance and avoid costly design mistakes before implementation.

40%
yearly energy savings
50%
less engineering time
25%
higher bid‑win rate on HVAC tenders
60%
lower failure & call‑back costs

Built for engineers working on HVAC systems

Engineering Consultants

Design and validate HVAC concepts with greater confidence.

Design & Build Contractors

Reduce technical risk before installation starts.

Decarbonisation Teams

Compare options and prove performance before decisions are made.

Try Hysopt on a real HVAC system

Explore an interactive model and see how our platform identifies performance issues, compares design options and optimises system behaviour.
Used by pro engineers on 500+ projects worldwide
Or try it now on one of your own projects.
Introducing AI inside Hysopt

DeltaT is your gateway to AI-powered HVAC engineering

An intelligent sidekick built directly into Hysopt, giving you instant answers, expert guidance, and real HVAC knowledge—right where you work.

No more breaking your flow to search documentation or chase answers. DeltaT brings years of engineering know-how and real project experience into your workflow, so you can move faster and make decisions with confidence.

Resolve warnings. Navigate workflows. Understand system behaviour—without leaving the platform.

Launching May 13.

See Hysopt in 170 seconds

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

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

Select components and automate commissioning with the Hysopt Calculator, streamlining tasks like pipe sizing, valve selection, and BOM export.

Synchronise HVAC calculations with BIM models via the Hysopt BIM Syncer, reducing rework and improving coordination.

By shifting from component-level design to system-wide simulation and validation, Hysopt helps you predict, compare, and prove performance—before installation.

How Hysopt helps you design better HVAC systems

Build a physics-based model

Create a digital representation of your HVAC system, including components, controls and hydronic behaviour.

Design & Build Contractors

Test how the system performs under different conditions before committing to a design.

Decarbonisation Teams

Compare alternatives, reduce oversizing and improve energy performance.

Autodesk AECO Strategic Partner

Hysopt brings BIM and physics-based HVAC simulation closer together,
so teams can right-size plant, cut energy & CO₂, and reduce rework from P&ID to BIM.

E-book

Explore HVAC insights and benchmarks

Discover the 6 key HVAC trends for 2026 in this e-book packed with data-driven insights and actions to help you stay ahead in the changing market.

Download your copy today and see what no HVAC engineer can afford to ignore in 2026.

the state of hvac 2026 hysopt ebook

What HVAC professionals say about Hysopt

Tekst

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Position, Company name
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“I see Hysopt as my Swiss army knife. It allows me to gain insight into the dynamic behaviour of a system very quickly and early in a project.

Gert Moonen
Commissioner Sustainable Energy at Becks

"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

"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

Ready to design HVAC systems with more confidence?

See how Hysopt helps engineers simulate, validate and optimise HVAC systems before implementation.