Welcome

LESOSAI: 30 years !!

At a glance

Lesosai 7.4 is software for the certification and thermal balance calculation of buildings from 1984 containing one or more heated or cooled zones. It is designed primarily for building engineers, HVAC engineers and architects.

The software can be used in the following languages: French, German, Italian and English. It can use many calculation methods, which can be selected one after another. (see "Countries and Standards" below).

New features

  • Lesosai 7.4 import gbXML file format that is generate by Autodesk Revit, Sketchup (with Plugin) and Archicad (with Plugin). Work with the BIM logic (Building information modeling)
  • Lesosai 7.4 allows to do the MINERGIE-ECO® 2011 - 2012 label.
  • Lesosai 7.4 includes a wizard that allows you to quickly model a building, ideal for pre-projects and renovation diagnostics. It is now easier and faster !
  • Lesosai 7.4 includes the module Polysun Inside®, for the simulation, caluclation and dimensioning of solar thermal systems. Lesosai with the modul hourly calculations & SIA380/4 or with module RT2005/RT2012 France also contain simple routines for the calculation of photovoltaic systems.
  • Lesosai 7.4 contains enhanced models of thermal bridges from the SFOE (Swiss Federal Office of Energy) catalogue.
  • Lesosai 7.4 reduces the time taken to create projects: significant financial gains.

» Full list of new features

Complete software

Lesosai 7.4 allows the calculation of environmental impacts of the energy consumption, taking into account the energy used in the building, but also the building's construction materials (Life Cycle Impacts Analysis / Environmental Assessment). This calculation is based on a building life cycle approach, and uses the list of impacts maintained by KBOB (extracted from the EcoInvent database), and the methodology conforming to Swiss Draft Standard SIA2032 (Life Cycle Impacts Analysis complete with ECO+® module).

To calculate the heat transfer coefficient (U-value) we have integrated the software USai, which allows the creation of constructions and materials while controlling condensation. It also allows you to synchronise the database with those of the many materials producers who participate in the materialsdb.org project.

To simulate buildings anywhere in the world, Lesosai includes the meteorological data generator, Meteonorm®.

Lesosai can also calculate required heating power, follwing EN 12831 and SIA 384.201by zone or by room. The hourly calculations following EN ISO 13790 are validated with the help of tests follwing EN 15265. Lesosai offers the possibility of calculating the thermal inertia of the buidling by introducing layers of walls (calculation possible under the standard SIA382/1).

» Full list of features

Cutting edge software

The developers of Lesosai continually monitor new regulations and standards, and are constantly incorporating new features. The Lesosai user-experience is constantly being optimized to be as quick and easy as possible. The software was developed with support from several institutions and businesses, notably the Solar Energy and Building Physics Laboratory (LESO-PB) of Ecole polytechnique fédérale de Lausanne (EPFL).

» Institutions and Businesses credited

 

News
  • Lesosai 7.4: build 836 (14/04/2014)
    SIA380/1, Minergie
    * ajouté rapport résumé (1 page)
    Simulation horaire:
    * ajouté rapport de check
    * amélioré ventilation naturelle par fenêtre.
    * amélioré écrans résultats (ex: nb d'heures d'utilisation des stores)
    * ajouté exportation des résultats HVAC
    * amélioré le rapport
    Globaux
    * résolu problème d'impression apparus dans quelques Windows 7 depuis l'update 832
  • Cours Lesosai au Tessin 5-12-19.5.2014 (12/04/2014)
    Il 5, 12 e 19 maggio 2014 organizziamo in collaborazione con la Supsi i corsi Lesosai in Ticino.
    Per ulteriori informazioni:
    Iscrizione
  • Lesosai 7.4: build 834 (01/04/2014)
    * Résolu problème de chargement des météos dans certains PC Windows 7
    * Réactivé touche calculs mensuels
  • Lesosai 7.4: build 833 (25/03/2014)
    Polysun Inside:
    * corrigé erreur lors de création d'un local
  • Lesosai 7.4: build 832 (24/03/2014)
    Globaux:
    * Nouvelle base de données des vitrages
    * Corrigé bugs lors de la sauvegarde (gestion cloud des fichiers)
    * Nouvelle gestion de la newsletter
    * Corrigé quelques problèmes de séparateur "," dans quelques rapports
    * Ajouté une nouvelle partie informative des fabricants

    Partie USai:
    * Ajouté adaptation valeur U pour les toitures inversées. L’option est disponible uniquement sur la couche isolation d’une toiture.
    * L’orientation du graphique s'adapte en fonction du type d’élément: parois, plancher/plafond
    * Ajouté déphasage 0 à 24h
    * Ajouté la possibilité d’afficher les épaisseurs réelles ou les épaisseurs d’air équivalentes dans le graphique d’humidité

    Rapport Ecobilan/Minergie-ECO
    * Choix de l’indicateur : ajout du CED pour le label SGNI
    * Choix de l’unité : /m2an, /an ou total pour le label DGNB
    * Ajout de la possibilité de fixer la durée de vie du bâtiment à 50 ans pour le label SGNI

    RT2012
    * Corrigé l’ouverture du rapport standardisé dans word
    * Ajouté et amélioré les rapports
    * Corrigé l’inversion des noms des zones 2 et 3 des ballons de stockage

    Luxembourg
    * Ajouté la possibilité de changer la date du label
    * Ajouté la possibilité de lancer le rapport de check avant le calcul

    SIA380/4 ventilation
    * Amélioré exportation

    Calcul horaire/SIA2044
    * amélioré les tests
    * amélioré les bulles d'aides
    * nouveau EN-5
    * corrigé rapport EN-5 dans cas multi-installations de froid dans différents HVAC

    SIA380/1
    * Ajouté la possibilité de lancer le rapport de check avant le calcul

    CECB
    * adapté les exportation au nouveau format

    Ajouté des nouveaux raccourcis:
    * Fermer toutes les fenêtres: Shift+Ctrl+W
    * Edition des types de vitrage...: Shift+Ctrl+G
    * Edition des types de matériaux...: Shift+Ctrl+M
    * Edition des constructions...: Shift+Ctrl+C
    * Sauver sous...: Shift+Ctrl+S
    * Calculs: Ctrl+R
    * Formulaire: Ctrl+P
    * News: Shift+Ctrl+N
    * Rapport de check: Ctrl+K
    * Rapport de cycle de vie: Ctrl+L
    * Deutsch: Shift+Ctrl+D
    * Français: Shift+Ctrl+F
    * English: Shift+Ctrl+E
    * Italiano: Shift+Ctrl+I
  • Nouvelle base de donnée des matériaux (17/03/2014)
    Isover SA

» All News

NEW: Lesosai 7.4 !

Lesosai 7.4
Free Download !

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Lesosai 7.4: » Specifications | » New Features

Why buy Lesosai if I am…
Countries and Standards

Lesosai 7.4 can perform calcluations under the following standards and performance tests :

Swizterland:

  • SIA380/1 2007 and 2009
  • MINERGIE-ECO® Certification
  • Adaptation for pre-completing the Minergie® file, version 10a, 11a and 12
  • Exporting ECCB®
  • SIA380/4 Lighting
  • SIA2044 Useful energy requirement and operative temperature
  • SIA380/4 Ventilation
  • Summer overheating
  • SIA384.201 heating power
  • SIA 2031 Primary energy, CO2, air-conditioning (using values from SIA 380/4 and SIA 2024)
  • SIA 2032 Grey energy
  • SIA 2023 window natural ventilation
  • SIA 2028 Official Swiss meteorological stations

Luxembourg:

  • Calculation of Qh
  • Primary energy and CO2 calculation
  • Energy Passport

France:

  • RT2012
  • RT2005 motor TH-C-E
    (sheet for use)
  • Ubât, Ubâtréf, Cep, Cepréf, C, Créf, Tic, Ticréf, BBC
  • Standardized reports and XML files
  • Calculations of changes

Italy:

  • DLGs 192, DLGs 311 and calculation of Cd following law 10 (2008-2010 values)

And the global calculations methodologies:

Other software and sites
  • USai: Calculation of the U-value follwoing EN ISO 6946 and SIA180, of U-dynamic, and condensation.

     
  • ECAT: Adapation of Lesosai for the United Kingdom.