Heating Pumps

Circulation pumps for central heating and underfloor heating systems

How to choose a heating circulator pump?

A heating pump (circulator) moves water around central heating and underfloor heating systems. The right choice depends on the system type (radiators or underfloor), the required head and flow, and the pump's port-to-port length — new Grundfos ALPHA pumps share the same 130 mm or 180 mm dimensions as old UPS models, so replacement needs no pipework changes.

If the house has an old three-speed UPS, there are two direct replacements: the affordable ALPHA1 L (simple speed selection) or the intelligent ALPHA1 GO and ALPHA2 GO, whose AUTOADAPT mode sets the duty point automatically while the Grundfos GO app guides installation step by step.

For a radiator-heated house, ALPHA1 GO is usually enough; ALPHA2 GO suits underfloor heating and larger systems. For apartment blocks, commercial buildings and industry with larger flows and heads, there are the MAGNA1 and MAGNA3 ranges.

A new electronic pump typically uses 5–45 W instead of the old 60–90 W — electricity savings of up to 80%, so the pump usually pays for itself within 1–3 years.

To compare heating pumps with other Grundfos solutions, see the Grundfos heating pumps selection guide on our homepage, with price ranges and advice for every series.

Grundfos ALPHA2 GO küttepump

Heating pump prices

The price depends on the series and capacity. Below are the price ranges of our selection with a recommendation on when each series fits best.

SeriesBest forPrice range
ALPHA1 Lthe simplest replacement for an old pump — speed selection170–226 €
ALPHA1 GOreplaces most old UPS and ALPHA1 pumps — radiator heating in houses170–249 €
ALPHA2 GOtop model — underfloor heating and larger systems, GO app264–457 €
Grundfos ALPHA2classic electronic pump for larger systems264–863 €
MAGNA1apartment blocks and commercial buildings — large flows432–1681 €
MAGNA3commercial and industrial — highest head and control options534–2456 €

Frequently asked questions

Which heating pump is best for a house?+
For most radiator-heated houses the best choice is ALPHA1 GO — it replaces most old UPS and ALPHA1 pumps with the same port-to-port length and AUTOADAPT sets the duty point automatically. For underfloor heating and larger systems, choose ALPHA2 GO.
How much does a heating pump cost?+
Domestic models in our range cost 170–457 € (ALPHA1 L and ALPHA1 GO from 170 €, ALPHA2 GO up to 457 €). MAGNA1 for larger buildings starts at 432 € and MAGNA3 at 534 €.
What is the difference between ALPHA1 GO and ALPHA2 GO?+
Both are intelligent circulators with the Grundfos GO app. ALPHA1 GO suits most radiator systems in houses; ALPHA2 GO is more powerful and suits underfloor heating, larger systems and applications needing a higher head.
Does the new ALPHA GO fit in place of an old UPS pump?+
Yes — ALPHA1 GO and ALPHA2 GO are available in the same 130 mm and 180 mm port-to-port lengths as the old UPS and ALPHA models, so no pipework changes are needed. The Grundfos GO app guides replacement and setup step by step.
How much electricity does a new heating pump save?+
An old three-speed pump typically uses 60–90 W, a new electronic ALPHA only 5–45 W — savings of up to 80%. As the circulator runs continuously through the heating season, the new pump usually pays for itself within 1–3 years.
Which heating pump is recommended for underfloor heating?+
For underfloor systems, where the pump runs continuously at low power, ALPHA2 GO fits well — precise control keeps the flow even and electricity use low. For larger underfloor systems and commercial buildings, MAGNA1 or MAGNA3 is the right choice.