algorithmic modeling for Rhino


Ladybug + Honeybee

Ladybug and Honeybee are two open source environmental plugins for Grasshopper to help designers create an environmentally-conscious architectural design.

Installation Instructions

Download Ladybug and Honeybee

Remove Old Version

Example Files for Ladybug

Example Files for Honeybee

Ladybug on GitHubHoneybee on GitHub

Use this Reference for your Publications.

Ladybug started by Mostapha Sadeghipour Roudsari is licensed under a Creative Commons Attribution-ShareAlike 3.0 Unported License. Based on a work at

Members: 685
Latest Activity: 2 hours ago


What is Ladybug?

Ladybug is an open source environmental plugin for Grasshopper3D that helps architects and engineers create an environmentally-conscious architectural design.  Ladybug imports standard EnergyPlus Weather files (.EPW) into Grasshopper and provides a variety of 3D interactive graphics to support the decision-making process during the initial stages of design.

What is Honeybee?

Honeybee connects Grasshopper3D to EnergyPlus, Radiance, Daysim and OpenStudio for building energy and daylighting simulation.The Honeybee project intends to make many of the features of these simulation tools available in a parametric way.

You can get started by watching this video:

Here are three separate playlist for Ladybug, Comfort tools, and Honeybee.

For more information, see this presentation here:

or watch these videos:

Part 1: 

Part 2:

And this video here:

Discussion Forum

HELP No .eio file error 9 Replies

Hi Chris and Mostapha & all,I tried everything from the previous threads about this problem.I get the error that no .eio file is created.This model used to work few weeks ago(Chris and Abraham…Continue

Tags: eio, energyplus, results

Started by Nitë. Last reply by Nitë 2 hours ago.

Issue related to the Honeybee_Visualize Annual Comfort Result (VisualizeComfort) 9 Replies

Hello all. I have been following the wonderful tutorials by Chris Mackey, however on I am stuck on the late part of the video 8 - "Honeybee Energy Modeling - Importing and Visualizing Surface Level…Continue

Tags: Importing and Visualizing Surface Level Result, comfResultsMTX, Failed to parse the result file

Started by awkweird. Last reply by awkweird 7 hours ago.

font issue 2 Replies

I'm following the 3rd tutorial by Chris Mackey. However, the font for display surface attributes looks strange (see below). Can anybody advise how to solve this problem? Thanks!…Continue

Tags: font

Started by Grasshope. Last reply by Grasshope yesterday.

problem simControls honeybee May Update 11 Replies

Hi guys!I have a problem running Honeybee. After running Ladybug_UpdateThisFile, HoneyBee_Simulation Controls component updated to May 02 2015 version and stopped working.The component is red and…Continue

Tags: honeybee

Started by Letizia Martinelli. Last reply by Letizia Martinelli on Friday.

Ladybug Tweets

Comment Wall


You need to be a member of Ladybug + Honeybee to add comments!

Comment by Oleksii Dorozhkin yesterday

Hi guys, I'm so sorry if my questions are to noob but does any LB/HB tool allow:

- calculation/visualization of given room yearly energy consumption due to it's orientation?

- correction of general energy simulation assuming motion sensor controlled heating/cooling used?

- complex modification of .epw or similar data due to given environment (shade and wind, maybe some humidity simulation also exists)?

Your work is great!

Thanks in advance.

Comment by Chris Mackey on Friday

Hello Community!

I apologize that this reminder is coming so late but there will be a 3-hour webinar/workshop tomorrow/today (Friday the 22) on the Honeybee Energy components.  The webinar will start at 12:30 ad go to 3:30.

For those starting out with the HB energy components and who are looking for a quick overview of all the current energy modeling capabilities of HB, this will be a good way to start.  For those veterans of the community, you will get the latest on the thermal mapping capabilities that I added for my academic thesis (literally just submitted today) along with a preview of some new features to come.

Register here:

Stay awesome,


Comment by Grasshope on Thursday

I'm following the 3rd tutorial by Chris Mackey. However, the font for display surface attributes looks strange (see below). Can anybody advise how to solve this problem? Thanks!

Comment by Theodoros Galanos on May 7, 2015 at 1:53am

Hi team!

How long would you say a PMV indoor comfort analysis would run for a 3 floo house? I'm at 2.30 hours and I'm not sure if I should stop it (i.e. if it's never going to finish) or not.


Comment by Jason on May 5, 2015 at 10:40pm

Hi Abraham,

Many thanks for your reply. It works~




Comment by Abraham Yezioro on May 5, 2015 at 10:22pm

Connect the panels instead the Merge to the UTCI component.


Comment by Jason on May 5, 2015 at 9:51pm

Hi all,

I would like to calculate UTCI using Ladybug_Outdoor Comfort Calculator with data that not from epw file but specified by myself. Error message "The calculation has been terminated by the user!" showed up when I tried to do so. I"ve attached the definition here. Appreciate any input in advance!



Comment by mona rezk on May 3, 2015 at 9:53pm

Hi Mostapha ,Chris & all , 

I need to define a kinetic wall which will open and close to ventilate the building on honey bee energy modelling .

I tried to use honey bee create HPsrf and defined it as a window but I've got an error . 

so how can I define the facade as an opening element ? 

Comment by Chris Mackey on May 2, 2015 at 10:50am


You want to use the "Create LB Header" component to take your old data and put it in a format the the LB components will understand.  Here's an example:


Comment by Kristoffer Negendahl on April 28, 2015 at 2:35am

Hi fellow honeybees and ladybugs.

I just like to ask anyone who use these plugins to engage in this brief survey. The survey closes in two days and it will only take 5 minutes of your time.



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