Type “L” Soft Tempered Copper

 The “Premier” choice for radiant panel distribution piping systems. Copper tube is the ideal piping material for floor and ceiling panels because of its heat transfer abilities, strength, pressure and temperature tolerances,design, long lengths, corrosion resistance and ease of bending, joining and handling. Soft temper tube in coils is commonly used for sinuous (curved pattern) heating layouts, since it is easily bent and joints are reduced to a minimum. See our Tubing Comparison Section and New Construction Section for more detailed information. For general information straight from the Copper Development Association click here. 
Copper radiant panel rough-in on wood sub-floor. 

Type “L” Hard Copper Tubing

 Hard temper tube is used for mains, risers, and grid-type heating coils where long straight runs are used. Hard copper is also used for plumbing boilers and water heaters for connection into radiant panel systems.