Loop CAD Help

[MarsTheProgrammer]

I'm working with LoopCAD for my radiant floor system. Currently have 10 circuits at 12" spacing.

For some reason, this just isn't filling as I thought it would. I get it's a bigger area (2700 sqft) and I'm in the upper corner, but it just doesn't seem right.

Any advice or help would be awesome. First-time self-build at 25

Edit: Added better picture

 

[Juiced06GTO]

Did you try upsizing the tubing so you could make longer runs? That may get you a better option. I believe 300' is the recommended max on 1/2 pex, you could jump up to 5/8 or even 3/4 and see if that nets you a better layout?

 

[RPH]

I was taught to place more loops on a closer center along the externals wall. It also appears to be dead zones in the concrete.