Wilo or grundfos

[Kurt]

Hi could you please advise which is the best heating pump to buy . My wilo smart has started to get a bit noisey . Do I go for another wilo or change to grundfos . Also do I go for a fixed speed or variable again . I have a new boiler only 6 months old , open vented system with trv valves on the rads . I'm looking for a reliable pump but most importantly it must be quiet .
Make and model please
thanks for your help in advance

 

[lame plumber]

they are all quiet initially, then it all depends on how dirty your system is

 

[joni os]

Grundfos would be my choice. Price and simplicity my guide. Many clients are satisfied with recycled grundfos pumps surplus to combi installs. This is my contribution to saving the planet.