Pex layout for floor heat

[aort11]

I spent a little time drawing this out. The main part is 30 x 36 with an 8 x 14 storage area attached. I got it pretty close, but the one green diagonal will be snaked through that area since I wasn't able to get 12" spacing. I don't think that will be too big of an issue. I just wanted to see if anyone saw a problem with any of it. The equipment will be in the storage room just on the other side of the wall.

The garage doors are purple and the walk in door is outlined in black.

 

[rburke65]

I think you will be perfectly fine with using that layout. Good luck.

 

[jonjon1]

Do you have a wirsbo distributor by you? I would bring them your plans and have them make your layout, they don't charge for the service...

I have a really good program for it if you want to pm me your plans, I am not positive how to get them to you but I should be able to email them... Get me a drawing and I input the data and get you a drawing, you will see the differences...

I will need
sq ft and ceiling height, with basic plans.
R values for the walls
door and window locations, sizes, and e rating
design temps {coldest day and desired internal temperature}
and I should be able to get you perfect...

 

[Demkog]

I would have a couple suggestions. I am not an expert but have done two garages and this is what I have learned.
Try to get rid of as many bends as you can, the straighter the pipe is the less head pressure, smaller pumps, and easier it is to put down, each bend the pex will fight a little make the bends as sweeping at possible. Looking at the yellow line mostly. Maybe a spiral all the way to the middle.
Make them as similar as possible you did a good job of that it will help in even flow on each loop without having to adjust flow at the manifold by adding restriction, better/even the flow is the better everything works.
You also want to run a return line next to a feed line to balance out warm and cold spots to get a more even temp.
You perimeter is going to be warmer than your center. If this is a living space I would say that is ok more heat loss at the walls but in a garage I put more heat in the middle where I was lying down on the concert keep me warm. Also your perimeter is normally covered in tool boxes and storage why heat them as much.
300 feet I would suggest 5/8” hose ½ is a little restrictive for that long of a run.
Also I ran a bit of a zone format so if I need one side of the shop warmer I could play with the manifold and make it get more heat.
Where are your garage doors?
Sorry for the long post just sharing my experience for better or worse.

 

[aort11]

I would have a couple suggestions. I am not an expert but have done two garages and this is what I have learned.
Try to get rid of as many bends as you can, the straighter the pipe is the less head pressure, smaller pumps, and easier it is to put down, each bend the pex will fight a little make the bends as sweeping at possible. Looking at the yellow line mostly. Maybe a spiral all the way to the middle.
Make them as similar as possible you did a good job of that it will help in even flow on each loop without having to adjust flow at the manifold by adding restriction, better/even the flow is the better everything works.
You also want to run a return line next to a feed line to balance out warm and cold spots to get a more even temp.
You perimeter is going to be warmer than your center. If this is a living space I would say that is ok more heat loss at the walls but in a garage I put more heat in the middle where I was lying down on the concert keep me warm. Also your perimeter is normally covered in tool boxes and storage why heat them as much.
300 feet I would suggest 5/8” hose ½ is a little restrictive for that long of a run.
Also I ran a bit of a zone format so if I need one side of the shop warmer I could play with the manifold and make it get more heat.
Where are your garage doors?
Sorry for the long post just sharing my experience for better or worse.

I edited the image to show the garage door orientation.

 

[Demkog]

I know a lot of the builder will say to have more hot pipes but the door for temp uniformity, and in a house I would agree but in a shop i would say put the heat where you are. maybe run your system in the other direction. Flip the return and feed.