double pumpdouble post
Silly question; why do we use motorised diverter valves?
- Thread starter Googlyhead
- Start date
As soon as you get into multiple pumps, you need a header to distribute the heat equally to all the circuits.
This is typically used in commercial setups, for domestic there are no real advantages, although someone is now promoting a low loss header for domestic use.
If you use motorised valves you are using far less electricity in a domestic setup than multiple pumps. It is a case of horses for courses, Grundfos Pump Plan is still available but is inflexible.
For instance, if you need a higher head pump on the CH, you have to buy a 15-60 bare pump and change the 15-50 head, which is then secondhand.
Also, a second heating zone after the event is awkward to accommodate. We fitted a few some years ago but they didn't seem to deliver any benefits.
So, Googlyhead, it has already been done - but iit s arguably not ideal for typical domestic setups.
This is typically used in commercial setups, for domestic there are no real advantages, although someone is now promoting a low loss header for domestic use.
If you use motorised valves you are using far less electricity in a domestic setup than multiple pumps. It is a case of horses for courses, Grundfos Pump Plan is still available but is inflexible.
For instance, if you need a higher head pump on the CH, you have to buy a 15-60 bare pump and change the 15-50 head, which is then secondhand.
Also, a second heating zone after the event is awkward to accommodate. We fitted a few some years ago but they didn't seem to deliver any benefits.
So, Googlyhead, it has already been done - but iit s arguably not ideal for typical domestic setups.
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