UK Plumber Forum

[Muffin99]

We're currently in the process of getting quotes to replace our system boiler. Somebody suggested we should get a boiler capable of hot water priority that could keep the boiler in condensing mode most of the time.

I did a quick Google search which seemed to suggest that since 2005 all new gas boilers installed in the UK have to be condensing boilers.

So my questions are:
Are some boilers better at condensing than others?
Can somebody please explain (in simple terms) what hot water priority means. (I have no technical knowledge at all).
What are the main advantages and disadvantages of hot water priority? Thanks in advance.

[REDSAW]

all boilers now are condensing, all about the same. they rarely condense unless you are running a bath or prolonged running of the tap so therefore when washing hands -useless.
the primary circuit is hot water supply, this simply means when there is a demand for hot water it turns off central heating circuit to supply the hot water.
some boilers like the intergas have adaptible variations of primary flow.