Indirect Unvented cylinder, Combi Boiler and Nest Thermostat

[Gasinspect]

We now fit a circulating pump on the hot water from the cylinder. Combi heats it fine, all hot water taps from cylinder so no time lag. Put circulator on a ceiling mounted proximity sensor so that runs for 15 minutes when activity in the bathroom area. The kitchen sink near enough not to need circulation.

 

[ShaunCorbs]

We now fit a circulating pump on the hot water from the cylinder. Combi heats it fine, all hot water taps from cylinder so no time lag. Put circulator on a ceiling mounted proximity sensor so that runs for 15 minutes when activity in the bathroom area. The kitchen sink near enough not to need circulation.

You mean a src (secondary return circuit)

 

[Welder]

Im assuming that too Shaun. Fact is tho that is not always an option. Plus, in its life, it wastes huge amounts of energy if its a retrofit because no pipework will be insulated. Frankly its cheaper to waste water.

 

[dan_the_plumber]

Combi on unvented is fine. If you’ve got your 2 port valve and all other G3 kit installed correctly then there nothing wrong with that at all. Assuming it’s installed correctly the coil is just like another radiator

 

[Harvest Fields]

Combi on unvented is fine. If you’ve got your 2 port valve and all other G3 kit installed correctly then there nothing wrong with that at all. Assuming it’s installed correctly the coil is just like another radiator

That’s also what we were saying mate