Radiant Floor Tubing Size

The amount of pex used in a radiant heat system depends on the size and insulation of the room and how the room is to be utilized.

Radiant floor tubing size.

The size of pex tubing used does not change the amount of heat that is produced but it does change the maximum loop length that can be run. 1 2 inch pex tubing accounts for the majority of residential radiant heat installations and should be used in most slab overpour or joist underfloor heating applications. The pex tube size dictates the flow rate that can be achieved and thus the maximum loop length of the pex tube. For actual calculations consult with your radiant system designer.

For example by increasing the flow through 1 2 pex tubing by only 0 1 gpm floor output will increase at 5 btu sq ft hr. 5 0 out of 5 stars 3. The simplest way to determine the amount of pipe you will need is to first choose the appropriate tube size and spacing for your application then determine the overall lineal footage of tubing based on the square footage multipliers listed below. Pex or cross linked polyethylene tubing is used to transfer heat to the floor.

For example by increasing the flow through 1 2 pex tubing by only 0 1 gpm floor output will increase at 5 btu sq. There are several ways to size an rht pex tubing and manifold kit for your shop hangar or residence. That is our boiler primary loop tubing size. Looking at the btu h pipe size chart above we find that a 1 1 4 copper tube will be able to carry that much heat.

If you re trying to figure out what products you need for your plumbing heating or hvac project you ve come to the right place. This size is adequate for all small to medium size jobs both in residential and commercial projects. Radiant heat applications supply heat directly to the floor of a room and promote heating from the ground up. Only 1 left in stock order soon.

1 2 is by far the most common size of tubing used in radiant heat. 1 2 oxygen barrier pex is the most popular size used for radiant floor heating in both thick and thin slabs. 5 8 3 8 and 3 4 follow behind. When we plug the 180 000 btu h and the 1 25 tubing into bell gosset s system syzer for a 50 propylene glycol filled boiler we get 17 31 gpm flow.

5 8 barrier pex can be used for larger projects where high btu load is present due to lack of proper insulation larger than normal slab thickness or special project considerations.