Best DesignBuilder Alternative for HVAC System Software
DesignBuilder vs Hysopt
DesignBuilder is great for static building energy modelling, but real HVAC system performance needs more. Hysopt turns load calculations into dynamic system simulation — with hydraulic design, balancing, and control optimisation in one easy workflow. Switch to Hysopt to cut waste, verify performance, and deliver systems that work as designed.
What’s the Difference between DesignBuilder and Hysopt?
DesignBuilder is trusted for architectural modelling, static loads and regulatory checks. It’s excellent for demonstrating design intent and hitting sustainability targets on paper.
But here’s the gap:
It doesn’t design or verify the actual HVAC system.
Hysopt closes this gap by adding dynamic system-level insights. It shows you how the system works in real conditions, finds hidden inefficiencies, validates control strategies, and ensures the performance you promised is the performance you deliver.
- Included for sizing
- Core feature
- Fully integrated
- Not available
- End-to-end
- Not included
- Built-in
- Not available
- Included
- Not included
- System schematics, sizing, savings
- Static building performance
Why HVAC Engineers Add Hysopt
1. Go Beyond Loads
DesignBuilder is perfect for proving compliance and building envelope performance — but Hysopt shows exactly how your HVAC system will perform once it’s built and running.
2. Find & Fix Inefficiencies Early
Hysopt identifies oversizing, balancing problems and control gaps that static models miss — cutting wasted energy and hidden costs.
3. Deliver Proven Savings
With Hysopt’s dynamic simulation and CO₂ impact reports, you can show clients exactly how much they save — turning design intent into measurable results.
Who Switches from DesignBuilder to Hysopt
MEP Engineers & Consultants
Start with static loads — finish with dynamic system design.
Commissioning & Operations Teams
Reduce handover issues by designing systems that balance and control correctly from day one.
Asset Managers & Facility Owners
Verify that your system delivers real energy and carbon savings.
Switch from DesignBuilder to Hysopt — Smoothly
Hysopt works with your DesignBuilder insights — not against them.
• Use your load results as inputs
• Build dynamic simulations from real data
• Guided onboarding with HVAC engineers
• Templates and automation make model building fast
- Dynamic system behaviour
- Static loads only
- Testable logic
- Not included
- Verified
- Manual estimates only
- Proven data
- General building outputs
Frequently asked questions
Does Hysopt replace DesignBuilder?
Can I use my DesignBuilder data in Hysopt?
Is Hysopt hard to learn?
Does Hysopt improve energy performance?
Ready to see the Difference?
Make the switch from DesignBuilder to Hysopt today — and deliver HVAC systems that work exactly as promised.
Still comparing?
Discover the Hysopt software
Discover our innovative simulation and calculation software, completely tailored to HVAC engineers.
Join the ranks of leading professionals already using Hysopt to deliver remarkable results.