Heating pump - Variable or 3 speed?

[Spokeshave]

Hi,

I’m looking for a central heating pump. It’s for a fairly conventional Y-Plan open vented system, condensing oil boiler, TRV’s (except for 1 rad). DHW.

I’ve come across the variable speed Grundfos Alpha 2L. This pump is a bit more expensive than the 3-speed types, but it is supposed to be more energy efficient and quieter due to its speed related to the load placed on it.

Is this all a bit of a gimmick, can it be used on a system such as mine and has anyone any idea of the drawbacks with this type of pump?

Much appreciate any advice on this.

Thanks and Cheers

Spokeshave

 

[kevplumb]

for the amount of energy a pump uses

yeah its one hell of a gimmick

only advantage is noise

if that aint a prob save yer brass

 

[mickyg]

more to go wrong and causes havoc with some boiler designs that require a constant higher flow rate through the heat exchanger.

 

[Spokeshave]

Thanks, good point, it might be an idea to find out what the boiler manufacturer (Grant) recommend.

Cheers

SS