Hello everyone,

I have been looking everywhere for an informed take on this but am finding wildly different information so I was wondering if anyone on here has a view on this that they are willing to share.

We are in the early design stages of a chilled water system but are vacillating between whether it is a good idea to use variable speed pumps rather than conventional pumps.

Is there any significant advantage to using variable speed pumps that justifies the increased installation cost?

What is the usual payback period for something like this? My gut feeling is that this will be quite long....and that 'it depends'.

Don't like the loss of three way valves the variable speed pumps entails. Is there any positives to this anyone can think of other than an offset against the cost?

Any other thoughts on this would be welcome.