So you've finished building your habitat as shown in the screenshot below and now you want to pressurize it so you can work and live comfortably on Mars.



Before we continue will need to make a checklist so we know the inside is ready to go.

1. We need a 'Barrel Slot' wall piece, this will hold our barrels of O2, CO2 or Nitrogen.
2. We need a 'Life Support Module', this will provide O2, CO2 or Nitrogen to the habitat.
3. We need a 'Power Socket' wall piece, this will provide power to the habitat.

Referring to the screenshot above we can see these 'machines' on the back wall.

1. Our 'Barrel Slot' wall piece is on the right side and has barrels loaded onto it.
2. Our 'Life Support Module' is on the left side wall, has power and is functioning fine.
3. Our 'Power Socket' wall piece is also on the left side next to the Life Support Module.

In the screenshot below you can see the 'Internal Airlock' we've constucted using the following:

1. A 'Door Frame with Floor' attaches to the floor below. (The white part connects to our 'Floor' piece)
2. An 'Airlock Door' is attached to the 'Door Frame with Floor'.

On the outside of the habitat we attach a 'Corridor' piece to the opposite side of the 'Door Frame with Floor' piece. Then once we've made the corridor as long as we want using 'Corridor' pieces, we close it off with a 'Door Frame' and then an 'Airlock Door'.

As shown in the screenshot below.




The screnshot below shows an 'Airlock Door' opening correctly outward after being placed.

Now that we've prepped both the inside and outside of our habitat it's time to pressurize it. Go back inside your habitat and face the inner door.


Inside our habitat and facing the inner door.

In the screenshot above you can see we're back inside and we've left the inner door open. Now we need to look at the 'Life Support Module'.


Looking at the 'Life Support Module'.


A closer look

The controls are as follows:

Stop Icon
This button will stop any process (Pressurize/Depressurize)

Human Icon
0.3 - Sets habitat atmosphere to 0.33 kPa (Uses O2 Only)
1.0 - Sets habitat atmosphere to 1.0 kPa (Uses O2 & Nitrogen Only)

Plant Icon
0.3 - Sets habitat atmosphere to 0.33 kPa (Uses O2 & CO2 Only)
1.0 - Sets habitat atmosphere to 1.0 kPa (Uses O2, CO2 & Nitrogen)

EX. ATM
This setting will start filling your barrels (or huge resource tank) with the atmosphere of Mars. Mostly O2, CO2 and Nitrogen.

PRESSURE
Local - Displays the current pressure inside habitat. (Martian Habitat)
Exterior - Displays the current pressure outside habitat. (Martian Surface)
Martian Habitat: 0.3kPa (Safe), 1.0kPa (Safe). (Suit Required If Not Pressurized)
Mars Surface: 400-500Pa (Deadly, Suit Required On EVA).

STORAGE
320/1254 - The number on the left is how much of said resource you have (O2, CO2 or Nitrogen). The number on the right shows the required amount of resources needed (O2, CO2 or Nitrogen) to fill and pressurize the habitat.

LOCAL COMPOSITION
The current mixture of gases inside the habitat. If these are randomly changing the habitat is filled with martian atmosphere.

Is there a difference between the two settings Human or Plant?
No. You can use either human or plant setting to pressurize the habitat. This might change as Dram said the 'Plant' settings were suppose to make you dizzy/sick cause of the added gases. But at the moment you can use either one without any issues.

How many 'Life Support Modules' do I need to fill my habitat?
You will need 1 LSM per room built. If you have a single room habitat meaning one large 'base' a single LSM will do just fine, however the resources needing to pressurize will be higher vs. a multiple room base.

What constitutes a room for placing a 'Life Support Module'?
As explained in the previous Q/A, if you just built one large square habitat it will fill fine with just one 'LSM'. But if you've built sharp turns or rooms back to back they will require an 'LSM' seperate of your 'main room'.

F**K THIS IS HARD...... I KEEP DYING AND CAN'T FIND WHERE I SHOULD PUT AN LSM FOR A ROOM....F**K THIS GAME!
Well that isn't much of a question but.... Keep your suit on and walk around your base after you've finished it. If the HUD on your helmet doesn't show 'EXT. SAFE' after you've pressurized the habitat then you need to place an 'LSM' on the wall in that section of your habitat.

After selecting whichever atmosphere (Human or Plant) turn back around and face the airlock again.



Facing the airlock after selecting an ATM on the Life Support Module


At this point you should see the words 'EXT. SAFE' on your suit HUD. You should now be able to remove your suit. If you want to go outside now you just need to enter the airlock, close the door behind you, walk over to the outer door and push the 'Cycle' button on the airlock door. This will depressurize the 'airlock' and leave the habitat behind us pressurized. Don't forget your suit!!!

The huge resource tank can also be used to provide resources to the habitat. The screenshot below shows how to attach them properly.



A 'Huge Resource Tank' attached and providing Oxygen to our habitat.



This screenshot shows us 'how' it's all done.

Here we have a multi-room habitat, notice anything different?


This type of habitat not only has airlocks but introduces hallways now.








As we can see in the screenshot above we're inside one of these hallways. First off, if we need to, let's scroll all the way back up and refresh ourselves with how we pressurize a habitat with an airlock. Ok? Are we refreshed? So if we want to pressurize a habitat that has an airlock along with a hallway to another habitat and maybe another airlock? The formula would go something like this:

HAHAHA!!! Formulas... You thought I was gonna pull some math on you huh? Nah. Just make sure you open the door going into your hallway just like we did with the airlock.



Open the door where the LSM is located. It's behind us in this screenshot so we need to keep this door open to pressurize the hallway, the door at the other end needs to stay closed. Keep in mind hallways use regular doors not airlock-type doors. You can use airlock doors for your hallways but you might run into pressurization issues between habitats, airlocks and hallways.



Remember: 1 LSM per Room, Keep innermost door open to fill corridor, Airlock doors for going outside, (regular)Doors for hallways.




Now we can select which atmosphere setting we want and then both the airlock and hallway will get pressurized along with our habitat! YAY!! GO US!


Remember: The bigger the habitat the more resources we need O2, CO2 or Nitrogen. Airlocks and Hallways add to the habitats size.

The following are screenshots showing the different parts used in this guide.



Door Frame with Floor



Door Frame



Corridors - Solid, Glass and Suit Holder



A door (L) and an Airlock door (R) - Don't mix these up!



An Airlock and Habitat/Living Quarters