algorithmic modeling for Rhino


Ladybug + Honeybee

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

Installation Instructions

Download Ladybug and Honeybee

Remove Old Version

Ladybug PrimerHoneybee Primer

Example Files for Ladybug

Example Files for Honeybee

Ladybug on GitHub

Honeybee on GitHub

Use this Reference for your Publications.

Licensed under @license GPL-3.0+

Read more here

Members: 1100
Latest Activity: 10 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 four separate playlist:

Want to see a full presentation?

Check out this presentation or watch it: Part1Part 2

And this video here:

Discussion Forum


Hi Thank you for your great program. I was wondering how to calculate the ASE with honeybee. I can get the grid based percentage of time over 1000 lux over the year but this is not exactly what ASE is, do you have any suggestions how it can be…Continue

Started by Mahsa Zomorodian. Last reply by Mostapha Sadeghipour Roudsari 10 hours ago.

Honeybee Adaptive Comfort Analysis Receipt Bug 2 Replies

Hi all,I am running an energy simulation with honeybee to show indoor microclimate map. The simulation works fine but the honeybee adaptive comfort analysis receipt component keeps show this error message below 1. For one of the meshes in the…Continue

Started by Niccolo. Last reply by Niccolo 12 hours ago.

[FAQ] Where to find .epw weather data? 17 Replies

[This list will be modified over time]Free resources:1. The main source is DOE's website:…Continue

Tags: Honeybee, Ladybug, EPW, Weather Data

Started by Mostapha Sadeghipour Roudsari. Last reply by Mostapha Sadeghipour Roudsari 20 hours ago.

Problem with honeybee_solve adjacencies component 6 Replies

Hi Mostapha and Chris,I am running into a problem and can't find a solution.I think it’s a little bug in modeling.I have a box inside another box(as you see in the picture) . I want to solve the adjacencies to run an EP simulation . if the inside…Continue

Started by Iman Khayat. Last reply by Iman Khayat 21 hours ago.

Outdoor Comfort and Tree Transparency 2 Replies

Greetings, Has anyone had any success in modeling tree transparency with regards to outdoor thermal comfort? I am attempting to utilize the UTCI calculator in Ladybug with the use of the Solar Adjusted MRT component. There current does not seem to…Continue

Tags: MRT, Ladybug, UTCI

Started by Kit Elsworth. Last reply by Kit Elsworth yesterday.

Ladybug_sunrise/sunset 31 Replies

Hi Mostapha, Chris and AbramHaving read Kimia's comment, I made a new potential component that finds sunrise, sunset for anyplace on earth using equations from Astronomical Algorithms, by Jean Meeus.Besides these two output, it calculates the solar…Continue

Tags: Honeybee, +, Ladybug

Started by Antonello Di Nunzio. Last reply by Cheney yesterday.



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