TEA (Thermal Environments App)

Modules for the calculation of microclimatic indices: “moderate”, “hot” and “cold” environments

The GIDAS-TEA program calculates the microclimatic indices (hot and cold stress and thermal comfort) most used and recognized by international standards. The program is divided into three modules:

Module for moderate environments (thermal comfort) Calculation of thermal comfort indices to evaluate the distance between the current situation and the theoretically optimal one:

  • PMV Expected average rating (ISO7730)
  • PPD% dissatisfied (ISO7730)
  • DR% dissatisfied with air currents (ISO7730)
  • TO Operating temperature
  • Module for cold environments (thermal-cold stress) Calculation of cold thermal stress indices, useful where there is a significant intervention of the body’s thermoregulation system in order to limit the potential excessive decrease in body temperature:
  • IREQ Thermal insulation required (ISO11079)
  • IclReq Thermal insulation required by clothing (ISO11079)
  • Dlim Maximum duration of exposure and Drec recovery time (ISO11079)
    TWC WindChill temperature
  • Module for hot environments (thermal-hot stress) Calculation of hot thermal stress indices, useful where there may be a risk of heat stroke and dehydration due to high temperatures:
  • WBGT Internal / External (ISO7243: 2018)
  • PHS Predictable thermal stress (ISO7933: 2004)

In case you need to calculate the three types of indices, you can opt for the complete software (BSZ318).

TEA (Thermal Environments Application)


  • Database of environments, subjects and analyzes performed;
  • Measurement tables and graphs;
  • Configurable analysis report;
  • Simulation and calculator functions;
  • Lite functionality included for fast single-point analysis.

Module for data logger configuration and data download

GIDAS-TEA includes a module that sends the most appropriate configuration to the data logger according to the probes availability to carry out microclimat surveys. It also includes a specific module for data download without the use of 3DOM.

Managing surveys, stations and measured items

  • Data logger devices can record measurements as surveys. each survey is identifiied by a number and its data/time of start/end of the merasurements. GIDAS-TEA records survey and allows separate microclimate analysis
  • Setup and storing of the position where surveys have been carried out, including description as site, building, environment, measurement position
  • Subjects setup: clothing (Clo), metabolic rate (Met) and Efficiency (%). These information are obtained from recorded tables from relevant ISO standards.

Survey analysis per position

Once a position is configured, it is possible to match the relevant surveys and carry out the microclimate indices analysis for each related subject. GIDAS-TEA tracks all the results obtained in the same position over the time. This is useful to monitor dynamic changes over the time, depending by the microclimate conditions and the different analyzed subjects.

Report of data

  • It can formulate charts and tables using environmental measurements and indices calculated for each subject in each position
  • It automatically produces a final report with information about position of measurement, free texts, tables and charts. This report can be saved as docx or open office xml (ECMA-376).

PHS index (Hor environments module)

The PHS index (predicted heat Strain) described in the ISO7933:2004 standard, allows to verify the working and resting environments and supply working and resting cycles to the worker to avoid heat stress situations according to the limits.


  • Simulation feature: it is possible to replace one more measures environmental quantities (e.g. air temperature) with a fixed value and allows to estimate the microclimate indices. This also helps to choose which sensor/measure to be used for a specific calculation, in case of equal quantities coming from different sensors (common situation in multi-measurement nteworks).
  • Calclulator: it is possible to set specific estimated values for all the input values of the microclimate calculations, and to provide results of indices in those dynamic conditions. It is possible to change aech specific value to check how the index values could change in different conditions. Results can be exported as ASCII or Excel files.


Module to carry out calculation of microclimate indices over a single survey and single subject, without the setup of the position where it was carried out.

  • Data download from the connected data logger
  • Data displays in easy and fast way
  • Direct calculation of microclimate indices: selection of the survey, setup of the subject parameters and correspondent result achievement

TEA (Thermal Environments Application)

Available Models


Module for cold environments

Thermal stress – cold
Useful when the body's thermoregulation system intervenes to reduce the potential excessive drop in body temperature. It calculates the following thermal stress indices:
  • IREQ Insulation Required (ISO11079)
  • IcIREQ Clothing Insulation required (ISO11079)
  • DLim Duration Limited Exposure and DRec Recovery Time (ISO11079)
  • TWC Wind Chill Temperature

Module for moderate environments

Thermal comfort
It calculates thermal comfort indices to assess the gap between the most comfortable situation and the real thermal conditions:
  • PMV Predicted Mean Vote (ISO7730)
  • PPD Predicted Percentage of Dissatisfied (ISO7730)
  • DR Draught Rating % (ISO7730)
  • OT Operating Temperature

Module for hot environments

Thermal stress – hot
Useful for hot thermal stress conditons that may imply health risks as heat strokes. It calculates the following thermal stress indices:
  • inside/outside WBGT wet Bulbe Globe Temperature (ISO7243:2017)
  • PHS Predicted Heat Strain (ISO7933:2005).
The PHS index described by the ISO 7933: 2004 standard makes it possible to analyze work and rest environments and provide indications relating to the work-rest cycles that the subject must follow in order to prevent situations of heat stress according to the limits considered.
documents LSI Lastem

TEA (Thermal Environments Application)