Welcome

At a glance

Lesosai 7.2 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 7.2 import gbXML file format that is generate by AutoCAD Revit, Google Sketchup (with Plugin) and Archicad (with Plugin). Work with the BIM logic (Building information modeling)
  • Lesosai 7.2 allows to do the MINERGIE-ECO® 2011 label.
  • Lesosai 7.2 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 7.2 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 7.2 contains enhanced models of thermal bridges from the SFOE (Swiss Federal Office of Energy) catalogue.
  • Lesosai 7.2 reduces the time taken to create projects: significant financial gains.

» Full list of new features

Complete software

Lesosai 7.2 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
  • Update Lesosai 7.2 build 699 (16/05/2012)
    * Globaux

    rapport modèles, amélioré la partie fenêtres
    possibilité d'introduire le vitrage d'une fenêtre de façon simplifiée
    amélioré l'aide
    amélioré l'importation gbXML


    * SIA380/1 / Minergie / Régl. Luxembourgeois

    amélioré le graphique de Sankey (ponts thermiques et %)


    * Minergie P

    adapté le rapport des modèles aux exigences des certificateurs


    * Minergie ECO

    Nouveau rapport (nouveau format officiel)
    Plus d'options pour les calculs simplifiés
    possibilité d'avoir des zones de catégories différentes pour la ventilation mécanique

    * SIA2044 / EN ISO 13790

    les calculs des besoins d'énergie et de la température opérative sont maintenant possibles1
    introduction de l'affectation libre
    quelques changements dans les méteo
    il est possible de définir la partie convective des gains
    corrigé quelques bugs

    * RT2005

    amélioré rapport rénovation

    * RT2012

    changé le choix pour lancer les calculs
    activé la possibilité de définir CE1 et CE2 dans groupe
    corrigé quelques bugs secondaires

    1Les calculs horaire par pièce SIA2044/EN13790 ont été vérifiés dans plusieurs situations, mais vu le nombre de variables restez attentifs aux résultats
  • Update Module Polysun Inside 5.8 (16/05/2012)
    * Nouveau Moteur 5.8
    * Plus d'éléments (chaudières et accumulateurs)
    * PAC air-air et PAC air-eau
    * Exportations MsExcel et XML
    * Possibilité de définir l'ombrage pour les capteurs
  • Update Lesosai 7.2 build 700 (16/05/2012)
    RT2012 : calcul b dans zone non chauffée
    Minergie A: exportation dans excel
  • Lesosai et Minergie (05/05/2012)
    * SIA380/1: calcul du besoin et des valeurs limites, exportations vers le fichiers Excel
    * SIA380/4: calcul du besoin électrique pour l’éclairage et la ventilation (débits thermiquement actifs
    * SIA382/1: vérification des baies vitrées et coefficient U, calcul de la capacité thermique, taux de surface vitrés et facteur de transmission
    * SIA2044: besoin de froid et calcul de la température opérative
    * Calcul de la couverture solaire thermique avec le module Polysun Inside
    * Calcul de la puissance spécifique pour Minergie P
    Minergie-ECO: energie grise, éclairage naturelle, catalogue des questions
    * Calculateur de cadres et de fenêtres
  • Nouvelle base de donnée des matériaux (01/05/2012)
    Holzwerk Schneider u. Co
  • Nouvelle base de donnée des matériaux (26/04/2012)
    Swisspor SA

» All News

NOUVEAU: Lesosai 7.2 !

Lesosai 7.2
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Lesosai 7.2: » Specifications | » New Features

Why buy Lesosai if I am…
Countries and Standards

Lesosai 7.2 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
  • 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 2025 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.