● Product news · 30 June 2026

INDALO becomes i4o.

A rebuilt, improved simulation engine, the same rigour — a new name and four months of evolutions that tighten the product around two promises: the indoor air quality of your buildings, anticipated in design, then certified against the frameworks.

In June 2026, INDALO changed its name to become i4o. Under the hood, nothing was lost: the rebuilt and improved calculation engine, the materials and outdoor air databases remain the foundation. What changes is the tooling around it — designed to make IAQ simulation a seamless service for engineering firms, from the model all the way to the certification report.

“From the model to the label, in a single tool.”

Indoor air, certified

Four frameworks at the core of the product.

Simulation no longer stops at computing concentrations: it now leads directly to a compliance assessment, with a deliverable your certification body can use.

HQE Sustainable Building

Complete IAQ assessment exported as a Word report, factoring in ventilation and radon risk, ANSES 2024 VGAI thresholds, with reworked figures and summary.

BREEAM International NC

Dedicated report with Hea 02 weightings, explanatory tooltips and rating scales, from Pass to Outstanding.

LEED v5 BD+C

Assessment aligned with ASHRAE 62.1-2022 (EQp2, EQc1, EQc5) and gap analysis to target Certified through Platinum.

INTAIRIEUR®

A fourth framework added in June 2026: A+/EMICODE material labelling, outdoor pollution (ODA) and radon factored in, over the real occupancy period.

Data, made accessible

Your data, and the real site's.

A customisable material library.

Add your own materials and emission databases; they are labelled and identified in your projects, alongside the Pandora library.

Real outdoor conditions, available.

Outdoor air pollution corrected for land cover, worldwide weather history and radon risk determined from the address (Europe, United States, France) — fed directly into the calculation.

Simplified variants.

Compare ventilation and filtration scenarios in a few clicks, without rebuilding the model, to make decisions before the works phase.

Indoor air, anticipated

i4o Studio — your model becomes a simulation.

IFC & gbXML import.

Automatic space detection — rooms, areas, volumes, walls — and occupancy retrieved directly from the gbXML file.

2D views and ventilation editing.

Navigate level by level, select multiple spaces, adjust terminals, air passages and air handling units without leaving the Studio.

Saved projects.

Pick up your work where you left off, across multiple models and collaboratively.

Built into your engineering tools.

The i4o modules on Pleiades (Izuba Énergies) and Virtual Environment (IES) have also been relaunched, to run IAQ simulation from the environment you already use.

And also

A new interface.

Visual redesign

Sidebar navigation, more readable pages, harmonised charts.

Dark mode

Available everywhere, charts and heatmaps included.

Four languages

French, English, German and Spanish, with a built-in switcher.

Free trial

Anticipate indoor air. Certify your buildings.

A few minutes are enough to launch a first simulation on one of your projects — no credit card required.

Start a free trial