The Grundfos ALPHA2 25-80 180 circulation pump offers outstanding energy efficiency with an energy efficiency index of 0.17, representing one of the highest efficiencies in its product class. This compact pump operates with variable power consumption ranging from 3 to 34 watts and is suitable for various heating and water circulation applications. The device features a built-in flow meter for fault diagnosis and system balancing. Several operating modes are available, including the AutoAdapt function, which automatically determines and maintains the optimal operating point for your heating system. This factory preset mode ensures efficient performance while retaining settings during power outages. Additional manual settings include the proportional pressure mode, which adjusts the pressure according to varying heat demand and is ideal for radiator systems with thermostat valves. The constant pressure mode maintains a constant pressure regardless of heat demand, suitable for underfloor heating systems. The constant speed mode provides fixed-speed operation for applications with constant flow rates. Each manual mode offers three adjustable levels for precise control. The pump measures approximately 180 mm in length with 25 mm connections and 80 mm installation dimensions. Constructed with durable materials, this circulation pump is designed for reliable long-term operation in residential and commercial heating systems, water circulation applications, and garden irrigation systems. Its compact design allows for easy installation in space-restricted environments while maintaining consistently high performance standards. It is suitable for integration into existing heating systems or new installations with efficient fluid circulation.