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My Aunty has an old WB Highflow 3.5 circa 94 and after about 5 minutes the DHW runs cold/tepid. This problem is only apparent when the heating is on. She has had WB service engineers out who have replaced the tank and heat exchanger etc. within last couple of years but problem still exists even...

Tks for your replies. It does seem a way of having a good performing cylinder without loosing the whole airing cupboard!

This seems an interesting idea but does it work well in practise? From what I can gather the boiler heats a secondary tank in which is immersed a smaller primary water tank thus providing a larger surface area to heat than a coil type cylinder – according to ACV this means faster re-heat...

Simon – tks again for the info’ on the Heatmaster though I’m not certain (being a simple accountant!) ‘fundamentally simple’ is phrase I would use regarding your previous sentence :D Is the Heatmaster a stepped increase in cost over say the new WB 440HF i.e. more like the cost of an unvented...

Tks for extra info’ BB – had a quick read of your link and a tad above my head so will most probably be keeping it ‘simple’ in my terms.

Tony, Do you know what efficiency our 25yr old Ideal Mexico Super RS would roughly be? Tks again Stuart

Tks to all of you for your responses - the world of central heating is a complex thing! Tony I Take your point about boiler efficiency – so modern boilers maybe a tad more efficient than our 25yr old Ideal Mexico Super........ :) Simon I saw that the ACV Heatmaster condenses throughout...

My understanding is that a temperature differential is required for boilers to condense and therefore work at full efficiency but I think I have read (somewhere that I can no longer find – hence the question!) that combi boilers can condense in DHW mode – is that right and if so does it apply to...

Tks for your replies. I guess for the amount they cost and extra time taken to install it, it is probably worthwhile to have one of these 'cleaners' for a new system. Any comment on power flushing as a first step? Isn't it likely to be throwing good money after bad :?:

I have just been speaking to a number of local heating engineers to understand what boilers etc. they fit and to see if it is the type of work they do i.e. an installation and I was confused by the following: One said that they did not fit a magna clean to a totally new system as it would be...

Why don't you heating engineers write to your MPs and complain about this Warmfront issue if you feel strongly - or maybe even find out which minister is responsible and write to them?

Reason for questions is that thinking of changing heating system and combi under consideration but people have told me tales of how long it takes for hot water delivery and that it is annoying - admittedly these people may have older combis - and I am not only interested in flow rates etc. but...

Sorry if 'Q1' wasn't clear... What I meant was: Say you run the hot water tap to fill a washing up bowl and then turn it off. If you then turn the hot water tap on again (in a reasonable time frame i.e. before water cold in pipes) will you still get continuos hot water (as you do from my...

Tks, but I am still not convinced we need and unvented system for just the 2 of us and do like the idea of having hot water on demand :? As you can guess still cogitating!

I understand the keep warm facility on combis should ensure a quick delivery of hot water, but could somebody confirm: 1, If a tap turned on, off and then on again in reasonably quick succession if only hot water will flow even if the combi had stopped firing; and 2, Can you run the hot...

Hi, We are 2 occupants with one main bath/shower and one en-suite bath; 25 year old Ideal conventional boiler with vented tank, and I am guessing original pipe work (solid ground floor) and radiators of 40 years; and the tanks recovery time is ‘pants’ – I guess that is due to it being a...