Christoph Reinhart
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Comment Wall (15 comments)

At 11:08am on June 14, 2013, said…

Hi Christoph,

I have installed DAYSIM on windows 7 64 bit. Where does the executable live. I cann't find it in c:\DAYSIM\bin

Kind Regards,


At 11:26pm on October 6, 2013, Shakiba said…

Hi Christoph,

I am gonna use daysim for my thesis project simulation which is about daylighting performance of a library.

as a novice user I don't know which one of the  Ecotect, Rhinoceros or SketchUp to use for modeling.

may I ask you to guild me?

At 11:16am on January 18, 2014, SHAHRYAR said…

Dear Christoph,

Would you please help and guide me that how can I convert TexPad format to .pts format to analysis my project in Daysim. I have drawn sensor point in Sketch up and have transformed to TexPad.

Another my problem is that in my project which is consisted from 2 Floor and in second floor my sensor point height is related to origin is more than 0.85 I was wondering if you could help me, by letting me it is ok or not.       Sincerely                                                                                            

At 12:23pm on January 29, 2014, David Burton said…

Dear Christoph,

I am using Ecotect and the Radiance/Daysim export tool.

Is there a way to adjust the UDI metrics as follows?;

UDIs = <100lux

UDIa = 100-3000lux

UDIe = >3000lux

Many thanks.


David Burton

At 2:39pm on February 6, 2014, Adrien CARPENTIER said…

Dear Mr Reinhart,

I am currently using daysim and I am looking for a solution to get the hourly illuminance on sensors but only due to the direct solar irradiance (without the diffuse part of the sky).

Do you have any idea to get this results ?

Thanks a lot for your help.


At 7:28am on February 26, 2014, Razvan Lucanu said…

Hello Christoph,

I am interested in using radiance (lighting simulation) in order to calculate DA and UDI values for schools.

I would like to know if radiance (lighting simulation) can calculate the DA and UDI values only for a specified occupied period of a school year: Monday to Friday from 08:30 to 16:00 (at hourly intervals) with lunch break, half term breaks and holiday breaks etc.

I am assuming that it only calculates the daylight levels on a specific day of each month and then averaging the values to give an overall yearly value.

Kind Regards,

Razvan Lucanu

At 4:26pm on April 21, 2014, James Woodall said…

Dear Christoph,

I have recently discovered your plug-in, and have been working my way through the tutorial provided. However when I select to export my model for use within Daysim the export (header) files are not created in the export directory selected.

Can you offer any guidance as to how I can overcome this or suggest where I may have gone wrong if this is a common issue?


James Woodall

At 8:22am on September 22, 2014, Mariana Caldas Melo said…

Dear Reinhart,

I'm from Brazil, and I'm using daysim on my dissertation, however, I'm in trouble.

I'd like a graphic result of the simulation, for that I'm using the plugin su2ds in sketchup. I can reach run simulation, but the part of analysis simulation isn't be able to be done. 

I've tried using ecotect to, but I'm not finding the NRC Materials Libery for dowload Because of this it's ocurring a error on materials during the simulation.

Could you please help me? My email adress is

At 8:30am on May 6, 2015, CHRYSO HER said…

Dear Christoph,

I am using Ecotect and the Radiance/Daysim export tool.

Is there a way to adjust the UDI metrics as follows?;

UDIs = <100lux

UDIa = 100-3000lux

UDIe = >3000lux

Many thanks.

Chryso Her, email:

At 4:55am on May 22, 2015, user7 said…

Mr Reihnhart,

I have installed Daysim on Windows 7.For some reason when running ladybug and Honeybee Simulation in grasshopper I get error from Honeybee Run_Daylight_Simulation: Can´t find the results for the study.

Have tried to install Daysim 4.0 yet the file does not even open.

How do you solve such problem?

Kind Regards,

Niya Syarova

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