Tech News

31st May 2019

Summer Release 2019

The cyclic ENVI-met summer release fixes a number of bugs and problems that occurred during the last months (see below). The most important, it introduces a new license system which allows a more flexible usage of ENVI-met licenses by providing an interactive registration and de-registration process for licenses on remote computers.

The BASIC version has been renamed to “ENVI-met LITE” and, as announced 6 months ago, now coverers a maximum model domain of 50 x 50 x 40 grids.

What’s new:

  • – Increased performance due to datatype conversion of timestamps
  • – Fixed stability issues: less errors (especially for several simulations running parallel on 1 PC) ? eliminated canvas draw errors
  • – Bugfix Pollutants: now works correctly in parallel mode
  • – Bugfix Vertical SingleWalls: They got too cold since they did not receive any shortwave radiation
  • – Changed the filename structure of output files to be ordered chronologically ?
  • – Added more location information to INX and EDX files for Nesting purposes of Winter release (UTM Zone, more accurate coordinates)
  • – Added remote license registration on multiple PCs

6th February 2019

In our newest update that is expected to be released this week, we added some major changes that will simplify your workflow with the ENVI-met Suite.

One of the major updates, which was implemented by our team, is the integration of an automated updater that will check whether your version is up to date and suggest a possible update when you start the program. That way, you will always have the most current version of our always-improving programs.

With the newest version – ENVI-met 4.4.1 – there will be no more size limitations for model area outputs in LEONARDO. Only your system setup will influence the allocated memory. In your model area, you can now use telescoping combined with splitting: The lowest grid box is split into 5 subcells to get more information about the conditions close to the surface and telescoping is used to increase your model area height while at the same time saving computational time.

When creating a new Simulation File, most parameters have suggested default values we provide for you. With changing conditions and test runs of our newest program, we decided to change some of those default values: The CO2 concentration is now set to 400 ppm, the default TKE solver is now TKE_Bruse, and the default lateral boundary condition is now Simple Forcing. This should lead to fewer instabilities and bugs that some of you have reported in the forum. You will still be able to choose the old values (e.g. CO2 of 350 ppm, open LBC (though not recommended), or TKE_Mellor&Yamada) in order to compare your new simulations with your old ones.
Besides those changes, another major difference of the new ENVI-met 4.4.1 is that the Full Forcing now expects the relative humidity instead of the absolute humidity. This should simplify your workflow as most measurement data is given in relative humidity.

In addition to these major changes, we’ve implemented some minor changes and bug fixes:
Business licenses can now again edit the CPU demand when using the Advanced Mode of the ENVIguide, the ENVIguide has now a summary page before you save your simulation file, the calculation of sun hours in high latitudes was corrected, setting a new map via .SHP File Import now works correctly in MONDE, the MONDE and SPACES Cut to Area Tools have been fixed – just to name a few.

We are very excited for you to install and test our newest update and appreciate your input and hints for bugs in the forum. Thank you for your interest in our program and your collaboration!

Your ENVI-met Team

11th December 2018

Webinar: ENVI_MET Winter Release 2018 & Grasshopper plugin for ENVI-MET
Dec 11, 2018 7:30 PM – 9:00 PM CET

ENVI_MET has much anticipated new features in their winter release including a Grasshopper and Ladybug plugin. This live webinar demonstration from the creator of ENVI_MET will showcase new capabilities.

Part I (Prof. Dr. Michael Bruse)
New Green Facade and Roof module Full Forcing, improved Boundary Conditions
MONDE, vector-based model area editor

Part II (Antonello di Nunzio)
Export outputs to NetCDF
Grasshopper and Ladybug plugin

Sign Up here

10th December 2018

Tutorial Winterrelease:

We are overwhelmed by the huge interest in our newest ENVI-met feature – the Façade and Roof Greening Module. Using the new module, the effects of wall and roof greening onto the building energy performance as well as on the outdoor microclimate can be simulated. With it, climate change mitigation strategies can be quantified and evaluated.

6th December 2018

We are excited to present today the first ENVI-MET plugin for Rhino Grasshopper

The new plugin has been developed in the Ladybug Tools by Antonello Di Nunzio and enables users to to convert Rhinoceros 3D designs to ENVI-met model areas and run ENVI-met simulations without directly opening the ENVI-met software.

This makes the usage, especially for architects who commonly utilize Rhinoceros 3D for their designs in the first place, much easier.

Many thanks to Antonello Di Nunzio for making this component collection available – all the hours of hard work have really paid off . Antonello will publish the new plugin on Ladybug Tools forum and LinkedIn in the evening.

26th November 2018

New ENVI-met V4.4 is available today

We are thrilled to announce the winter release of ENVI-met 4.4, ready to run on your desktops and servers.
This new release is a game-changer for our company, and we think you’re going to be very pleased with the innovations that will come with it.

Developing urban green spaces is one of the most important principles for adapting to the climate of the future. However, for these adaptation strategies to be effective, the consequences of different measures need to be evaluated.

In order to fulfil this need, the Winter Release 2018/2019 focuses on the implementation of Wall & Roof Greening with the new Green Façade module. This module grants the ability to simulate green wall and roof performances as a solution to sustainable urban development for the very first time.
Besides this new module in the field of green architecture, we developed the new editor MONDE and enhanced the possibility to provide user generated boundary conditions for various meteorological parameter by adding Full Forcing to our model.

Finally, there is now the option to convert ENVI-met Outputs to NetCDF and from the 6th December to use an ENVI-met plugin for Grasshopper that has been developed in the Ladybug Tools.

22nd June 2018

We are happy to announce the second part of the online course Decoding Urban Nature: Microclimate Analysis beyond Wind and Sun on Mon, 25th June, 19:30 CET. After talking about the fundamentals of microclimate and the interactions between local design and thermal comfort, the second part will show a case study and provides a hands-on the Envi-met software system.

More info + preview—>

18th June 2018

We are happy to announce a new online course with Prof. Michael Bruse, Director Innovations & Products and main designer of the ENVI_MET software.

Decoding Urban Nature: Microclimate Analysis beyond Wind and Sun

In the complex world of outdoor environments, climate parameters, vegetation, surfaces and structures constantly interact with each other. Due to the resulting interdependencies, these elements cannot be seen isolated. All interacting elements must be analysed even if only a single climatological aspect such as air temperature is required. This is possible using Envi-Met.

More info + preview—>

29th May 2018

New ENVI-met V4.3.2 is available today

We are thrilled to announce our new summer release of ENVI-met with a lot of new developments and improvements. For the first time, the new release features a 64bit version of SPACES, which enables the processing of large model areas in high resolution. In addition, miscellaneous bug fixes have been implemented. At this point we would like to thank you for your valuable contributions and your feedback to achieve this improvement!

As usual, ENVI-met users can obtain the summer release by downloading the newest version from our website.

If you’re not a satisfied user already, have a look at our homepage and try our basic version, which contains the most important tools for free. Start your first microclimate simulation right now!

9th April 2018

In a recently published peer-reviewed paper in Landscape and Urban Planning (Simon et al. 2018) of one of our team members, the newest version of the microclimate model ENVI-met was compared against measured data in a case study in Mainz, Germany.

Vegetation plays a vital role in urban environments: Aside from the aesthetic benefits, trees and other vegetation help mitigate the effects of the urban heat island by increasing the latent heatflux through evapotranspiration and decreasing the sensible heatflux through shading, resulting in lower air temperatures.

However, both the effect of vegetation on microclimate and the plants’ vitality need to be assessed to support and quantify the effects of such strategies. One way to assess the interactions between vegetation and the urban environment is through microclimate models that can simulate the effects of vegetation onto the urban microclimate as well as effects of urban environments onto vegetation. To provide reliable estimates microclimate models need to be parameterized based on empirically obtained data.

In this paper a comparison of modeled transpiration rates and leaf temperatures of the leading microclimate model, ENVI-met V4, with in-situ measured stem sap flow and leaf temperatures of two different trees in an urban courtyard was performed. The vegetation model of ENVI-met is evaluated considering four synoptic situations including varying cloud covers ranging from fully cloudy to clear sky. The comparison of simulation results with empirical data reveals a high agreement. The model is capable of capturing the magnitude as well as short-term variations in transpiration caused by microclimatic changes. Modeled and observed diurnal tree transpiration and leaf temperature showed good agreement. These findings indicate that ENVI-met is capable of simulating transpiration rates and leaf temperatures of trees in complex urban environments.

19th March 2018

New Research paper: Validating the transpiration rate and leaf temperature of urban trees in ENVI-met

Green infrastructure is one of the key tools to mitigate the negative impacts of urban heat stress and to create sustainable living conditions.

Besides the casting of shade, the cooling effect of water transpiration from the leafs is the key feature that allows trees to modify the microclimate. Hence, modelling  the correct tree transpiration rate is crucial if we want to asses the impact of  trees on the local climate. Moreover, adequate soil water supply and leaf transpiration is necessary for all living vegetation to keep the leaf temperature below critical values that might lead to a damage of the foliage cells.

A paper just published by Helge Simon et al. in Landscape and Urban Planning, investigates the transpiration rate and leaf temperature of urban trees modelled by ENVI-met and compares it to real-site measurements under various meteorological conditions.

We are happy to share this paper with you for free for a limited time. Please follow the link below to get your personal copy:

Free Link (valid until May 02, 2018):

24th November 2017

We are thrilled to announce the winter release of ENVI-met on Friday, ready to run on your desktops and servers. This new release is a game-changer for our company, and we think you’re going to be very pleased with the innovations that will come with it.

With Version 4.3 (Winter 1718) a new chapter of ENVI_MET modelling will be opened with three new features that go hand-in-hand and will  allow a fast an flexible computing of large areas.

64 Bit Support: ENVI_MET switches the main model and main application to 64 Bit. This  allows to make full usage of the computer memory and is a necessary condition to compute large areas

Free-Sized Model Domains: Starting with V4.3 there are no longer predefined maximum model sizes such as 150×150 or 250×250. The memory is allocated dynamically to fit the selected model area size and is only limited by the computer resources available.

Parallel Computing: To allow larger model areas and also to speed up the calculation process in general, many routines of ENVI_MET are now parallelized to support multiple CPU cores. As parallel computing on standard computers is a relatively new field, we will continue to improve and extend the parallel routines in upcoming versions of ENVI_MET.

Connecting with the larger world: Nesting ENVI_MET in the WRF mesoscale model (TKR)

Currently a development of a coupling between the mesoscale Weather and Research Forecast Model (WRF) and ENVI_MET is in progress. This new downscaling method will allow ENVI_MET simulations to be driven by meteorological output data of WRF real data cases.

By completing this task a link will be established connecting climatic processes on the mesoscale and microscale level. High range processes influenced by mountains, lakes or forests will provide the input data for high resolution simulations with ENVI_MET. WRF seems to be the perfect driver for this, representing itself as state-of-the-art model with more than 20,000 users worldwide simulating weather forecasts as well as research projects.

15th May 2017

Regarding the energy balance of the interior of a building, our new editor MONDE assigns every building a number, which allows the adaption of the material properties for the whole building. A more detailed digitalization of the project area is possible from now on. Additionally, this enables a more accurate simulation of the air temperature in the inside, which depends on the orientation and the properties of the facades and the available volume of air, due to enclosed adjacent buildings.

1st February 2017

ENVI_MET Monde: The vector-based future of model editing (MBR)

Designing an ENVI_MET model area using the SPACES editor often consumes a large amount of time, especially for huge areas or if different resolutions should be used.

With the option of simulating very large areas from ENVI_MET V4.3, editing the Area Input Files by hand has become not only time consuming but practically impossible. Therefor we are developing a new vector based editor, “ENVI_MET Monde” since two years. The editor support the CAD-like drawing of buildings, vegetation and all other elements of the ENVI_MET Area Input files. In addition, you can import existing data from ESRI Shapefiles, access and import OpenStreet Map data or CAD files.

For the new app, you can easily generate ENVI_MET model areas in any resolution by the mouse click.

More information on ENVI_MET will be available soon.

30th October 2016

ENVI_MET meets Minecraft: Making building model areas collaborative and fun! (HSI)

The game world of the popular game Minecraft has many similarities to our microclimate model ENVI_MET: In both cases the worlds consist out of discrete three-dimensional blocks or, more technical voxels. In both, the game as well as in our microclimate simulation, these blocks can only consist out of a single material (air, building, vegetation, etc.). Minecraft, of course, does not store any physical properties such as volumetric heat capacity or albedo, but the multitude of different Minecraft block types together with a user defined lookup table that defines which Minecraft block type corresponds to an ENVI_MET database item make it possible to convert Minecraft worlds to ENVI_MET model areas. This way you can build your model areas together with your friends while playing Minecraft. Also, there is already a multitude of Minecraft replicas of cities that can be used to import to ENVI_MET.

5th June 2016

We are happy and proud to introduce a new PhD Thesis written by Helge Simon from our lab that has just be defended.

This thesis describes a number of new features introduced in ENVI-met including a wide set of numerical testing and in-situ validations.

The main features included are:

The new 3D plant-as-object model allowing a very realistic simulation of the plants transpiration behaviour
Introduction of a BVOC chemical model allowing to simulate the emission of biogen gases by plants and their impact on the NO-NO2-Ozone reactions (only in the Xpert Version of ENVI-met so far) Evaluation of the new multi-node wall model including validation studies
Coupling of ENVI-met with MUKLIMO_3 of the German Wather Service DWD (continuation of work) The thesis can be found here:

Most of the features included are already part of the new ENVI-met 4 engine.

Our congrats to Helge and enjoy reading!


Michael Bruse, CDO
ENVI-met | Decoding Urban Nature

9th Oct 2015

ENVI-met V3.1 is no longer provided as download. User support in our forum will kept up for the next 6 months and then will be closed as well. User support and forum for LEONARO 3.x has been closed down- please only use LEONARDO 2014 now.

22nd Augst 2015

A public preview III of ENVI-met V4 is now available (see download page).

23rd Jan 2015

A new public preview of ENVI-met V4 and of the AddOn 2014 solving a number of urgent bugs (see download page) is available.