IES HVAC Design Navigator

Load Calculations, HVAC Sizing and Reporting in About 1 hour

From Geometry to Sized Systems in 8 Guided Steps

The Navigator guides Mechanical Engineers through 8 focused steps - from geometry through room, zone and system loads to equipment sizing and reporting. It's built for how engineers actually work: up-to-date ASHRAE-based defaults, climate-filtered constructions, decoupled design preferences, and phase 1 of a new Zone Manager that improves the manual zoning grind. All without losing the 3D model, Heat Balance Method and dynamic calculations IES VE already delivers.

Guided Workflow

8 steps that cover only what you need - geometry to sized equipment.

Decoupled Sizing & Simulation

Set HVAC design defaults without breaking performance models.

Climate-filtered Constructions

Only relevant compliance constructions for your project.

Up-to-Date ASHRAE Standards

Consolidated 90.1, 62.1, 55 constructions and templates database.

From fully formed geometry to sized equipment in about an hour

Each step is designed to give you a simpler, guided route through IES VE taking you across these key jobs without losing the rigor the platform delivers. Before you start ASHRAE climate zones and min/max values are auto assigned based on site location, while a Climate Assessment Report transforms weather data into interactive visuals including ASHRAE Design Day data charts. Geometry creation is supported via quick start modelling or model import routes, helping you quickly get started with your HVAC Design workflow.

Is Your HVAC Workflow Ready for Modern Design Demands?

Modern HVAC design demands more. Our free interactive assessment benchmarks your workflow against today's requirements, giving you a personalised Maturity Score, practical recommendations, and a complimentary e-book on evaluating HVAC software.

Take the Free Assessment

HVAC Design Navigator Frequently Asked Questions

Isn't IES VE just an energy modelling tool?

No, IES VE is also a comprehensive HVAC design platform. It delivers 3D geometry, the ASHRAE Heat Balance Method, and dynamic HVAC loads, sizing and design today. The new Navigator delivers that same depth as a dedicated loads-and-sizing workflow, taking an Mechanical Engineer to sized equipment in about an hour after geometry is set up.
Why would our Mechanical Engineers switch from their existing HVAC sizing tools?

The Navigator keeps loads, sizing, energy and compliance in one defensible model - no re-modelling across tools. Your team gets the tabular, guided, defaults-driven workflow they're used to, plus 30+ years of ASHRAE-validated calculations and a single source of truth instead of fragmented spreadsheets.
How do we get our Revit models in without rebuilding?

IES Sync for Revit, an IES-native route built on a shared data intelligence layer, launches mid-September. It offers a direct connection from Revit to IES with a native transfer - no rebuild, no file formats.
How much time does zoning actually save?

Zone Manager Phase 1 auto-creates zones for unassigned rooms with a single click, purges empty zones that cause Apache errors, and visualises zones on the 3D model. That removes significant manual grind per project. Full tabular editing comes in Phase 2 - the Excel-style interface Mechanical Engineers expect.
We looked at IES VE a few years back. What's changed?

A lot. VE 2026 delivers a faster loads and sizing workflow, decoupled design preferences so you don't break energy models when you set sizing defaults, easier zoning with Zone Manager, climate-filtered constructions, and up-to-date ASHRAE constructions and templates.

Get in Touch

Want to see how the IES HVAC Design Navigator can speed up your load calculations and sizing? Contact us to book a demo or to discuss your workflow.

Capella Building, 7th Floor, 60 York Street, Glasgow, G2 8JX, UK

Tel: +44 (0) 141 945 8500 Email: enquiries@iesve.com