That's it WS, go and plumb in the garden too!
It might interest you to know that the return temp of
a heat store is far too hot for the boiler to
condense efficiently - between 35c and 60c is very
efficient.
Totally WONG!!!!
MAINLY CONDENSING OPERATION
If a whole bath is run off and the store temperature is around 10C, the boiler will raise that water say 35C to 40C emerging from the flow pipe - the temperature rise of the boiler. 10C returning to the boiler will guarantee high condensing operation. <u>Even if the condensing boiler is set to 80C, 80% of reheat time will be in condensing mode</u> and even more if set to 70C to 75C. The initial 1/3 of re-heat is highly efficient.
At return water temperature of 30C, 70% to 80% of latent heat is recovered. At 35C only 50% is recovered. A big difference in efficiency for only 5C return water difference. The thermal layering of a thermal store and the plate Heat X pumping water into the bottom of the cylinder less than 30C, ensures that when in operation the boiler is highly efficient recovering more latent heat than a condensing boiler directly coupled to a rad circuit and a coiled cylinder.
LARGE BOILERS CAN BE USED WITHOUT ADVERSE EFFECTS
A 70kW condensing boiler can be coupled to a direct store using 28mm pipes. This will give a high temp rise and ultra quick recovery.
DHW ENSURES VERY COLD CYLINDER BOTTOM
The modulating DHW pump ensures only very cold water returns to the cylinder. This gives a very cold spot at the bottom of the cylinder. This cold water then is pumped directly into the boilers return when the boiler is called.
SCALE RESISTANCE
The plates on the plate heat X flex and scale build up reduced. Scale is only a real big problem in excessive hard water areas like Reading.
THERMAL LAYERING DOES IT
Thermal store heat banks (with plates heat Xs) set to 70C give very acceptable DHW performance and condense <u>very well</u>. Thermal layering does it all for you. <u>Get to understand thermal layering</u>. The top of a cylinder can be 80C and the bottom 20C. The boiler is in the most ideal hydraulic environment enhancing efficiency, giving high condensing efficiency and boiler longevity, always having full flow through the boiler
BOILER CYCLING ELIMINATED
Heat banks eliminate boiler cycling which can be very inefficient in thermal heat loss and burner start up. The vastly reduced stress on controls gives boilers a long life. Very neat indeed. If a preheated combustion air boiler is used, tertiary heat exchanger, cycling can reduce the high efficiency of these boilers. Continuous operation for as long as possible improves boiler efficiency and thermal stores do that.
Now you know. You can now tell your mates in the pub.