Specifications of Lesosai

Main Specifications

  • Certification and hourly, monthly and annual calculation of heat balances in buildings containing one or more heated or air-conditioned areas.
  • Software languages: French, German, English and Italian
  • Modular software
  • Official weather data in Switzerland, France, Luxembourg, Italy, Germany and Romania
  • MaterialsDB databases from the producers of materials and constructions (www.materialsdb.org project)
  • Lesosai is the only software certified: SIA380/1 (Cantons), RT2012 (CSTB), LCA and natural lighting (Minergie Eco), SIA380/4 lighting (Minergie), SIA382/2-SIA2044, EN 15255, EN 15265, EN ISO 13791 (Lucerne University of Applied Sciences and Arts), ...

Basic version

  • Uses the EN 13790 monthly calculation method
  • Allows easy verification of building performance by the Swiss standard SIA 380/1 (2007, 2009 and 2016) and export to Minergie®, Minergie-P®, EN101b, CECB® Plus
  • import gbXML file format that is generate by AutoCAD Revit, Sketchup (with Plugin) and Archicad (with Plugin)
  • Allows easy verification of building performance under the Luxembourg Directive
  • Calculation of thermal transmittance (U-value) of inhomogeneous walls formed of layers, according to EN 6946, Dynamic U-values, and condensation (USai. See www.eco-sai.com)
  • Contains a database that is updated by the materials producers themselves (www.materialsdb.org)
  • Basic version of the calculation of environmental impacts over the life cycle of the building
  • Meteonorm® monthly enables the use of meteorological data from anywhere in the world
  • Allows easy verification of building performance under Italian directives DLGs 192, DLGs 311, and the calculation of Cd.
  • Calculation of shading on window
  • Estimate of boiler power according to European standard EN12831 and SIA384.201 by zone (calculated monthly)
  • Forms E1, E2, C, G for Switzerland
  • Integration of the catalogue of thermal bridges from the SFOE (not used for RT2005 France)
  • New Swiss official weather stations (SIA2028). Essential for heat balances certified to the standard SIA380/1 2009

Module Rooms - sizing hot/cold - comfort – electr.

  • Calculate cooling requirements according to EN ISO 13790 simple method, validated by the tests of EN 15265
  • The calculation of standard SIA 382/2 - 2044 allows: useful energy requirement and operative temperature, as well as final energy for the air conditioning requested by Minergie® and forms EN-5 and GE-4
  • Allows easy verification of performance according to standard SIA380 /4 - SIA387/4for lighting
  • Allows easy verification of performance according to standard SIA380/4 for ventilation
  • Allows easy verification of performance according to standard SIA385/2 for hot water
  • Allows easy verification of performance according to standard SIA382/1
  • Energy certificate following SIA2031 technical specifications
  • Certification Minergie-ECO® 2011 - 2012 - 2016, Minergie-A®
  • Hourly Meteonorm allows you to obtain the latest meteorological data for anywhere in the world
  • Estimate of boiler power according to European standard EN12831 and SIA384.201
  • Hourly distribution
  • Calculate the EN ISO 13791

RT2005 Module (France)

  • Allows easy verification of the performance of new buildings according to the French RT2005 directive
  • Uses the calculation engine TH-C-E version 1.1.3
  • Allows easy verification of the performance of restoration buildings according to the French RT2005 Rénovation directive
  • Uses the calculation engine TH-C-E ex (2008)
  • Calculates Ubât, Ubâtréf, Cep, Cepréf, C, Créf, Tic, Ticréf
  • Provides a BBC report in standardised XML format
  • Produces a file showing standardized thermal characteristics and standardized presentation of the synthesised thermal study
  • Calculation of variations
  • The calculation of the performance of existing buildings

RT2012 Module (France)

  • Allows easy verification of the performance of new buildings according to the French RT2012 directive
  • Uses the calculation engine Th-BCE version 7.5
  • Provides a BBC report in standardised XML format
  • Produces a file showing standardized thermal characteristics and standardized presentation of the synthesised thermal study
  • Calculation of variations

ECO+® Module - Lifecycle analysis of buildings

  • Calculation of environmental impacts over the lifecycle of the buildings, experts screens
  • The reports (including Minergie-ECO, DGNB) are more detailed. The results of gray energy are calculated for each layer

Polysun Inside® Module

  • Can simulate, calculate and design solar thermal systems

Competitive Edge

  • Designed by people involved with developing standards and guidelines
  • Benefits from the experience gained from 6 versions of Lesosai (since 1984)
  • Developed entirely by computer professionals
  • Enjoy direct contact with decision makers
  • Provides information on the precision of the result
  • Benefits from high-quality after-sales service

System requirements

  • Personal Computer (PC) with Operating System: Windows 7 or later, or an Apple Macintosh with an emulator (See FAQ)
  • 800MB of free hard disk space