"Christian McArdle" wrote | >So what does one do in the case of solid fuel boilers which can't be | >shut down totally? | Solid fuel boilers are exempt.
Ah. I wondered if the Gov'ment had banned those too, to encourage solid fuel users to convert to storage heaters installed by NICEIC members.
Owain
Sorry, I was only talking about oil and gas fired heating systems. With solid fuel, it appears that almost anything goes, although if the boiler has a fanned ventilation system, this should be timed and thermostated like oil and gas.
Christian.
They are not banned. As long as you have a 2-way valve on the gravity primaries and a cylinder stat, all is fine.
You also have to show that you are limiting primary circuit losses. It indicates that the preferred method is to used a pumped primary circuit with a reasonably rapid recovery coil and thermostatic control, so the pipes don't stay hot for long. With a gravity system, you would have to show an alternative method for reducing primary losses, as the heat transfer will be much slower and the pipes will stay hot and, thus, be inefficient.
Christian.
The pipes "must" be lagged. A quick recovery cylinder works better with gravity than a Part L.
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