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The Grundfoss pump units come complete with all the required components for straightforward installation making them ideal for use in our underfloor heating systems. Bolted onto our underfloor heating manifolds, they can adequately supply an area up to 140sqm. The thermostatic head controls the temperature and flow through the underfloor heating from any type of hot water source including oil and gas boilers. The control pack consists of a mixing valve, new A rated energy efficient Grundfoss circulating pump, return elbow, manifold adapter and all necessary seals.