Non-motoring > How does a hot water tank work? Miscellaneous
Thread Author: Bobby Replies: 28

 How does a hot water tank work? - Bobby
A family discussion at the weekend about energy savings.
Hot water tank linked to a system boiler.

Assume water runs through the boiler and is heated up and then put in the boiler and stored. Water is then drained from the tank when you turn on the hot tap.

But you can run the hot tap until you have used all the water and it runs cold so therefore the tank must backfill with cold water when the boiler isn’t on? Is that right? In which case does it always add cold water every time you run the hot tap and the boiler isn’t running?

So when you run the boiler again does it take the water from the boiler, heat it up again and put back in boiler? Or does it just add more fresh hot water into tank?

My sister says she only runs the boiler for 30 mins a day and that gives her all the hot water she needs for the day and I am trying to equate that with mine where I have a pressurised vented (or is it unvented) cylinder. I usually have my hot water on for 2 hours in morning and same in evening.

Of all the DIY stuff I have picked up over the years, I have just never got my head round boiler and heating!

Confused of Lanarkshire.
 Messages Author Date
 How does a hot water tank work? new Bobby 21 Sep 22 11:43
 How does a hot water tank work? new Zero 21 Sep 22 11:54
 How does a hot water tank work? new Bobby 21 Sep 22 12:00
 How does a hot water tank work? new Crankcase 21 Sep 22 12:14
 How does a hot water tank work? new Bromptonaut 21 Sep 22 12:40
 How does a hot water tank work? new CGNorwich 21 Sep 22 12:49
 How does a hot water tank work? new Bromptonaut 21 Sep 22 12:20
 How does a hot water tank work? new CGNorwich 21 Sep 22 12:35
 How does a hot water tank work? new Bobby 21 Sep 22 12:37
 How does a hot water tank work? new Manatee 21 Sep 22 15:12
 How does a hot water tank work? new MD 21 Sep 22 12:54
 How does a hot water tank work? new Rudedog 21 Sep 22 13:11
 How does a hot water tank work? new smokie 21 Sep 22 14:07
 How does a hot water tank work? new Bobby 21 Sep 22 14:32
 How does a hot water tank work? new rocket again 22 Sep 22 16:06
 How does a hot water tank work? new smokie 22 Sep 22 16:25
 How does a hot water tank work? new Fullchat 22 Sep 22 16:47
 How does a hot water tank work? new rocket again 25 Sep 22 18:21
 Hot + cold fill washing machines new Manatee 21 Sep 22 15:25
 Hot + cold fill washing machines new MD 21 Sep 22 15:51
 Hot + cold fill washing machines new martin aston 21 Sep 22 16:13
 Hot + cold fill washing machines new CGNorwich 21 Sep 22 19:00
 Hot + cold fill washing machines new Fursty Ferret 22 Sep 22 11:19
 Hot + cold fill washing machines new Manatee 22 Sep 22 11:58
 Hot + cold fill washing machines new smokie 22 Sep 22 12:11
 Hot + cold fill washing machines new smokie 23 Sep 22 09:30
 Hot + cold fill washing machines new Fursty Ferret 22 Sep 22 12:11
 Hot + cold fill washing machines new CGNorwich 22 Sep 22 12:37
 Hot + cold fill washing machines new Manatee 22 Sep 22 14:43
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