To transport the coolant to the mixing groups (SG) located in the greenhouse, a comb of transport groups (TG) is organized in the boiler room. Each TG is located on the supply and return pipes and consists of supply and return pipes, a pump and a three-way valve that directs the coolant to the SG, to the greenhouse, if required, or directly to the return line if heat is not required in the greenhouse. This allows for more precise temperature control in the greenhouse than simply turning the feed pump on and off.
A magnetic filter is located on the transport comb, through which the coolant is constantly pumped in order to remove chips, rust, etc. from it. The coolant is taken from the lower return point.
