>>Just checked - it's unvented and 260 litres in size. Is that normal??
260L. is fairly large. Ours is 300L but that's because we have a heat pump and have our HW at 50 degrees or less. That's for a nominally 5 bed house.
As somebody mentioned it gets blasted up to 62 degrees once a fortnight by the immersion heater to kill off any legionella. Although I don't know how the legionella would get in to a pressurised system. Actually I think heating the cylinder is almost certainly a waste of energy as it is constantly replenished by fresh water. If we have any bacterial growth I imagine it will be in the pipework of the unused showers in the house. With that in mind I flush them through when I remember to do it.
Does unvented mean pressurised system? If so then like us you won't have a dead pigeon tank in the loft, and your HW cylinder will be replenished from the main directly. They only seem to install pressurised systems now, new to me but it does mean we don't need shower pumps.
|
