Tenant says water does not last as long since plumber replaced immersion heater

Surely that's not right though, every economy 7 tank has two immersion heaters.

 

100l ?

Blimey, my fish tank takes nearly that!

Mr. HandyAndy - Really

 

Sorry, but that equation does not make sense!

So phi = 3

Is this the same as "delta T" in your equation?

If it is, we get:

3= 100 x 4.2 x 50.

Which is obviously incorrect.

Where is Time in the equation???

 

Correct equation.

T = (V x CP x DeltaT)/(W x 3600), where:

T = time taken (Hours)
V = volume (litres)
CP = specific heat of water = 4.2
DeltaT = temperature rise (10C to 60C = 50C)
W= Output of immersion element = 3kW
3600 = seconds in one hour.

So we get:

T =(100 x 4.2 x 50) / (3 x 3600)

T = 21000 / 10800

T = 1.94 hours

This, of course, does assume that the cylinder is perfectly insulated, so there is no heat loss while it is heated up.

 

Sorry, but I have no experience in heating and ventilation. So, i am unable to help you. Sorry.

 

Hi, I'm joining late on this thread so hope somebody will still be able to help. I am in exactly the same situation (however I'm the tenant) - I am on Economy 10 heating, with immersion heating water tank. Previously I had a small tank with 1 heating element and this wasn't enough. Last Feb we replaced my tank to a larger one, and I asked for one with two elements so I had back up should I need it.

Ever since Nov last year I have had continual problems with the tank (and ongoing hassles with original plumber) - overflowing, constant dripping, not enough hot water at all.

Originally they had told me that they would have to lower the shelf in the cupboard where the tank it because the tank would be that much larger, and they would need to have access to the tank as and when needed.

They didn't do this. When I queried it, they said it was because it would lower the pressure of the hot water (which is bad enough anyway). Fine I thought.

So, the leaking and overflow continued with the plumber coming no less than 3 times. He couldn't reach the ball valve to adjust.

Another plumber then came along and said that in order to get to the tank he'd have to cut an access hole into the wall to get access to the tank.

I also queried the fact that the 'normal' immersion element was in the middle of the tank and not at the bottom (hence I could hear water bubbling/boiling - causing the ball valve arm to bend and cause overflow problem?) - with the back up immersion element at the bottom of the tank.

Now, the immersion element at the bottom (spare one) has stopped working (I unfortunately have had to use it quite regularly as hot water is almost non existent on normal one), and am left with a useless water heating. And a plumber and landlord who seemingly care less.

My consumption: my son has a bath every night - not a lot at all, less than half full. I have a shower every morning (power shower), approx 5-10 mins.

Any advice will be so helpful. Thanks in advance. (Pics attached).

 

Dont know about the plumbing Roslyn but that flex needs sorting.

 

Hi, I'm not a plumber, but the quote above concerns me, how is the ball valve bending??, it shouldn't be anywhere near hot water.

Also the bottom element is for economy heating and the middle one for boosting.

 

I'm having the same issue.

Just had a new tank fitted. It's slightly smaller than the old tank but heating times used to be 30mins to get hot water but now 1 1/2 hours.

What your tenants might find is what I'm finding is that because it's not as hot you don't use so much cold water so you empty the tank quicker to get as deep of a bath.