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1 Introduction

IES-VE is capable of exporting a VE model for simulation on the Octopus Labs Indalo® indoor air quality validated calculation engine for indoor air chemistry, developed during a 3-year research project carried out by the French Agency for ecological transition.
 
Indalo® is capable of predicting the concentration of polluants in the air and the risk of viral infection in a building. It simulates the quality of the indoor air and takes into account:
·         More than 900 VOC.
·         Fine particles.
·         Ozone and nitrogen oxides.
·         Viral charge.
 
Indalo® predicts the concentration of hundreds of polluants while taking into account their emission source, aerolic transfers, photochemical interactions and surfaces/pollutant interactions.
 
Indalo® is designed for new or renovation projects and to assess indoor air quality for sustainable certification schemes such as HQE, WELL, BREEAM.
 
IES-VE parses model weather data, material selections, occupancy, HVAC system operation, air tightness and external & internal opening operation. It then uploads the data to the Indalo® calculation engine for simulation.
 
This document is a user guide for the IES-VE user that explains how to prepare a model, assign material choices to surfaces, pick simulation options, export the data to the Indalo® calculation engine and access Indalo® results.
 
This guide is aimed at users that have little to no experience using IES-VE.  Therefore, the guide will also include some basic modelling methods that form prerequisites of preparing for a Indalo® simulation.  A key part of setting up the system is the Indalo® navigator, which is a workflow tool that itemises the steps that are described below and also includes short-cut links to specific dialogs of relevance.