help!! Atmospheric/Environmental Controllers

This is my grow room setup !
I just order it . Please help me with it !!! Anything I should add or takeout
what would guys change ... Please ... This is my first soil grow
Please tell me what you think...

What are the main types of Atmospheric/Environmental Controllers
I need to buy??? I have know Idea!!! I'm stuck.. what are the essentials
Atmospheric/Environmental Controllers???


Parts list:
Flower Room: HydroHut Original Grow Room
27 "deep x 55" wide x 6.5' tall
600 HPS EconoCool Grow Light System
Compact Fluorescent - Daylight - 150W
Compact Fluorescent Socket w/cord
6" Flex. Aluminum Duct Hose - 25' long
Vortex 6" Centrifugal Fan 449 cfm
Dutch Breeze Carbon Air Filter


Veg Room/clone: HydroHut Kindergarden Grow Room
54.5" deep x 54.5" wide x 7' tall
400 MH Maximizer Grow Light System
T-5 Clone & Seedling System
Seedling Tray
Short Humidity Dome
Tall Humidity Dome - 7" w/vents

G.H. FloraNova Grow and bloom
RooTech Cloning Gel - 2 oz

Do I need this one ??? THC-1 - Total Humidity Controller
If so what does this do and how does it work
hate to sound like a newbie but shit you got to start somewhere
thanks

if you guys have any others in mind please post a pic of it thanks !!