HIU flexUFH
The flexible solution for every heating situation

HERZ HIU flex offers the optimum solution for all requirements and situations. The HIU flex family is divided into three main categories: HIU flexRAD is perfectly suited for radiator heating systems, while HIU flexUFH is ideal for surface heating systems with low flow temperatures. For systems with separate supply for heating/cooling and hot water, HERZ HIU flexLEN is the right choice. The selection of different tapping capacities depending on the category enables a flexible solution for every heating situation.

All models in the HERZ HIU flex family have one thing in common: they offer a fully pre-installed technology in a compact size, which ensures time-saving installation and maximum energy efficiency.

HIU flexUFH

The HIU flexUFH has been specially developed for low-temperature applications and is the ideal solution for surface heating systems with heating loads of up to 12 kW. Thanks to the integrated thermostatic readjustment, it offers reliable protection against calcification and scalding, while the HERZ Differential Pressure Control Valve ensures central control of the hot water temperature. At the same time, it has a hot water priority circuit that ensures that hot water is always provided as a priority without noticeably affecting the heating output.

The speed-controlled circulation pump, in combination with a safety thermostat (bimetal thermostat switch), ensures smooth operation by guaranteeing constant circulation of the heating water. In addition, the differential pressure controllers in the primary and secondary circuits ensure a constant differential pressure, creating a hydraulically stable system and distributing the heat precisely to the intended consumption points.

Another advantage is the summer bypass, which enables efficient and fast hot water supply even during the warmer months. The HIU flexUFH not only offers efficient heat distribution and a high level of comfort, but also ensures energy-optimised operation – regardless of the season.