Underfloor heating loop length and pressure drop: why it should not be excessive

The length of each loop directly affects the pressure drop and the required circulator pump power.

Longer length

As pipe length increases, hydraulic resistance increases, making it harder to achieve the required flow rate.

Temperature difference

In a very long loop, there may be a larger temperature drop from the beginning to the end.

Balancing

Very different lengths between loops require greater attention to flow regulation.

Proper design

The maximum length is determined by pipe diameter, required flow rate, available head pressure, and system guidelines.