Dragon fly-grasshoper

Dear ALL,
I want to simulation urban area with considering mitigation strategies on building energy consumption.
My question is can Dragon fly do this alone and it must couple by Envi-met?
And if I use Envi-met with Dragon fly how can I obtain results for building energy consumption in grasshopper?
What is the difference between Dragon fly and Envi-met?

Thanks in advance.

Hi -

Please visit https://discourse.ladybug.tools for questions related to the Ladybug Tools.