Flow Temperature Control

Overview
 
A circulating pump within an underfloor heating system must be able to provide the required flow rate and pressure loss to operate effectively. The heated water provided by the energy source must be at correct temperature to safely and gently warm the floor. They are typically used when:

  1. Uncontrolled Heat Sources such as wood fired boilers are used to heat the water,
  2. In Combined heating applications where the warm water temperature coming from the heat source must be kept on a high level, eg when radiators are connected to the same boiler
  3. When the boiler pump cannot provide the required flow rate at the specified pressure loss.

The maximum allowable temperature into a floor heating slab, topping slab or screed is 55oC. Temperatures above 55oC need to be avoided as they may lead to degradation of the concrete slab.