Radiant line route

[70staged]

Looking for assistance. I am going to be running in floor heat in my shop. Looking for company that give me a materials quote, size of boiler needed and how to route the pex. I emailed Souix Chief as they say they will according to the paperwork I received about their product but I have not heard anything back.
Northeast MO, 40x72 building

 

[PoorUB]

You will need just under 3,000 feet of tubing, maybe just over figuring scrap and about 75,000 to 100,000 BTU output on the boiler. Layout will vary depending on the floor plan and manifold locations. hope that helps!

 

[70staged]

You will need just under 3,000 feet of tubing, maybe just over figuring scrap and about 75,000 to 100,000 BTU output on the boiler. Layout will vary depending on the floor plan and manifold locations. hope that helps!

Yup that helps some. Gotta figure out the floor plan is my problem. I was thinking 6 loops of 300ft

 

[78SC4X4]

These guys will do a basic design for you. https://www.blueridgecompany.com/ You can also get a 30 trial version of loopcad. It isn't too hard to figure out and will help you with heat load calcs and tube layout.

But I agree with Poor. You'll need about 1 foot of tubing per sq ft. For 1/2 tube You want to keep the loops under 300 ft

 

[PoorUB]

Yup that helps some. Gotta figure out the floor plan is my problem. I was thinking 6 loops of 300ft

Six loops at 300 feet? That will cover only 1800 square feet. You can pretty much assume one foot of tubing for every square foot of floor. 40x72=2880 square feet, so roughly 3000 feet of tubing. 1/2 inch tubing typically runs 300 foot loops, 5/8"=400 foot oops, 3/4"=500 foot loops. Rough numbers 25 to maybe 30 BTU per foot of tubing depending on the size of the tubing. 1/2" is less BTU per foot that 3/4".

 

[yeldogt]

PEX is cheap -- you only get one shot. 1/2 tubing typically is the best bang for the buck as it's the most common. ... keep it within loop length parameters.

Bigger is not better. 5/8 tubing has only 10% more surface area over 1/2 -- at minimum spacing 10" and 8" bends. You actually have lower output with the 5/8 and more cost. longer loops slow response and require higher temps to change the slab. It much easier to increase the flow through 1/2 and get way more output.

Most times it's just a question of an extra loop ---- adding very little to the cost of the system. Even two loops .... the cost difference with the manifold is a few dollars .... the pump does not care and like I said .. PEX is cheap when you buy a big roll.

 

[70staged]

Sioux chief emailed me back today, just took them a few extra days. Looks like I am going to need about 11 loops. Got a parts list for everything, which boiler they recommend and mapping on how to lay everything out, plus the length of each loop