The ABN-FHB actuator is a thermoelectric actuator for opening and closing valves on heating circuit manifolds in underfloor heating systems. The actuator has been specially developed for targeted use in the widest variety of systems. Its compact size, design, functionality and flexibility are the most impressive features. A valve adapter concept guarantees the perfect adjustment of the actuator to almost any valve bases and heating circuit manifolds on the market. The ABN-FHB actuator serves to ensure the optimum control of valves on heating circuit manifolds. Control is performed via a 2-point room temperature regulator or by pulse width modulation.