View Single Post
  #11   Report Post  
PJ
 
Posts: n/a
Default Ravenheat Combi Boiler

You really are an awkward **** aren't you. Do you "know it all"? I'll
respond to your post one final time and then say bye because I just can't do
doing with you're attitude.


"IMM" wrote in message
...

"PJ" wrote in message
...

This clearly indicates you know nothing
of heating and water systems. Using
a combi with a normal tank and cylinder,
it is best to have only the shower
off the combi giving high pressure mains
pressure showers with no silly,noisy,
prone to failing pump, and all other hot
outlets off the cylinder. To do
what you did is foolish.


Sorry but I can't agree.


It is clear you don't know enough, so taking issue with the lies of is
rather silly.


Lies? Oh, right.

This is absolute nonsense. There are high flowrate combi's that will

deliver
high pressure (what the mains delivers) and flow.


FACT: Combi's rely on good incoming pressure to give high output pressure. I
have medium incoming pressure and no combi would ever give me the power
showers I get with a pump.

Now then, If YOU can prove me wrong please name some combi's which would do
what you suggest.



They also rely on high pressure
supply which some may not
have!


A number of combi's will operate as low as 0.1 bar pressure and up to 10
bar.


Yes but low pressure in = low pressure out. Combi's don't make pressure!

Now I mean high pressure - not good
pressure. I have "hotel" pressure
at my showers.


You could have that if you bought the right combi.


So like I say above... name some!


The noisy pump.... yes I'll give you that but
to be honest I don't hear it because I have
mine in the cylinder cupboard. I have also had
the same pump for three years and it is used
six times a day - it has never failed! AND if
it does that's fine too because at £250 it won't
bankrupt me. We have to pay
for using things and at this rate it's cheap!


Putting the £250 plus the extras on top of your combi costs would have got
you an excelent peforming combi.


So like I say above... name some!

Some do say that I did it back to
front but doing things your way a good
bath fill would empty the hot cylinder
leaving the rest of the house
(kitchen, utility, garage, etc.) with no HW
until it re-heated.


You install a quick recovery coil cylinder that will re-heat in about

10-15
minutes from cold. As you draw-off water it will be re-heating so re-heat
time will be even less.


That's 10-15 minutes WITHOUT hot water! That's means the second bath CANNOT
be filled immed. My larger tub would completely empty even a large cylinder
of hot water.


My way (which incidentally is agreed
upon by many)


Not by professionals who know what they are on about.


Well as it happens a college lecturer (a master plumber) OK'd it and gave me
the diagrams for it. He also said "the only way to achieve a good shower is
a combi for taps and a cylinder with pump for showers". Maybe he's thick
too?!

allows any tap to have endless
HW and the cylinder is only used
for pumped showers.


How long does it take to fill the bath?


I've never timed it but not long. 4 minutes perhaps. Personally I can't see
the need for a quicker filling bath anyway. Showers are for speed - baths
for relaxing.


I'm not saying you're wrong or I
am right. Each to their own.


It is not each to their at all. There is the optimum solution and you are
nowhere near it.


Here's the "know it all" attitude again. For MY needs I have the optimum
solution. I can state this because I am more than happy with the whole
set-up. It does exactly what it was intended to do. I NEVER run out of hot
water at the taps or showers, it's cheap to run, has minimum maintenance and
is very reliable. (optimum).

The way I did it suits me fine and
if i had my time over I'd do it the same way.


Only a fool knowingly does the same mistake twice.


OK, I'm a fool. I'm a happy fool though!

So, what are these super performing combi's then? The ones which increase
incoming pressure and give pumped shower performance without a pump? I'm
sure many here would like to know.