What do pumps do?


A house can have many different pumps installed, all dependent of the needs. Some for lifting water, some for pressure boosting and others for circulation and comfort.

Central heating explained

Whatever your central heat source – district heating, oil furnace or gas boiler – its function is to heat up water in the heating system. This heated water is then pumped through your house via pipes to your radiators, convector or under floor heating.

Standard pumps
Standard three-speed pumps run at a fixed speed all the time, regardless of the actual heating demand. That’s like driving a car at full throttle and only using the brakes to control your speed. This means that the pump builds up pressure even when it is not required, which causes noise in the system and wastes energy.

ALPHA pumps

An A-labelled, electronically controlled Grundfos pump never generates unnecessary pressure. Continuing the car comparison, an electronically controlled pump removes the foot from the throttle to slow down and it works out when it can slow down by itself.

The result? A big reduction in power consumption. Electronically controlled Grundfos ALPHA2 and MAGNA pumps are all A-labelled, which means savings of up to 80% compared to typical (D-labelled) pumps.

Comparing appliances
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