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: 1359
Latest Activity: 58 minutes 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

Daysim -dds option 6 Replies

Hi Honeybee team,I was wondering if it's possible to run the annual / daysim simulation in -dds mode, where instead of 65 sun positions the software considers 2305 sun positions? It would increase accuracy by quite a bit. (And if you use -dds -s…Continue

Started by Reinier Zeldenrust. Last reply by falko 58 minutes ago.

Temperature of surfaces 4 Replies

Hey there! I am looking for a plugin of Grasshopper that is able to make a simulation of the temperature on the external walls, roofs and streets of my 3D model of a group of 16 buildings. In other words I need a tool that would take as input an epw…Continue

Tags: temperature

Started by Valerio Soldera. Last reply by Valerio Soldera 1 hour ago.

Energy Plus simulation error on Honeybee:'ascii' can't encode character '/u131 in position 156 1 Reply

Hi , I was triying the tutorials series about honeybee and ladybug while doing it I had an error like this could u please help me?How can I fix it?Continue

Started by Erol Nezir. Last reply by Devang 1 hour ago.

Heating and Cooling Loads 4 Replies

Dear all, we are working to a simple tool for calculating the heating and cooling loads (for HVAC sizing).We have now completed the organization of the parameters we would like to control according to a general room (cube) with one window. However,…Continue

Tags: Schedules, Loads, Heating, Cooling, Adiabatic

Started by MMerlin. Last reply by Chris Mackey 5 hours ago.

[clarified] How is natural ventilation determined based on min and max values for both indoor and outdoor temperature? 11 Replies

On the Honeybee Set EP Air Flow component the min and max values for both the indoor and outdoor temperature can be specified to determine if natural ventilation through windows (ventilationType=1) will happen.…Continue

Started by Grasshope. Last reply by Chris Mackey 5 hours ago.

Fly! Component - accomodate larger-scale, complicated models 15 Replies

Hi everyone,I was wondering if there is a way to improve upon the Fly! component. I am currently working on Machine Learning and Parametric Design models using HB and LB. My first case study was a success. It was a simple model with only 23,000…Continue

Started by Theodoros Galanos. Last reply by Theodoros Galanos 5 hours ago.


The Butterfly workshop with @__Mostapha__ has reached capacity! There is many other great workshops with open seats, don't miss your chance!

The Butterfly workshop with has reached capacity! There is many other great workshops with open seats, don't miss your chance!


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