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I just wish to be certain before I change our intermediate light switch on our landing: We have two cables each with one black and red wire. The new switch has 2 L1s at the top and 2 L2s at the bottom (it's a contactum intermediate if that helps). I know I should be able to figure it out...

We have a problem Houston…. We have just had bathroom refurbished and a new towel rail added to the system. Our heating system is a one pipe system with two circuits for flow and return – please see diagram. The towel rail has been plumbed in to the circuit as if it is part of the one pipe...

Planning on having the extractor fan externally switched - would you still need to use an isolator switch in addition? Tks for any help you can give, Stuart

If the heating element for a towel warmer in the bathroom is on a separate circuit, i.e. utilising previous immersion tank circuit, would I still need a fused and switched spur? Any help much appreciated, Stuart

My understanding is that modern condensing boilers modulate to improve efficiency but I have come across a programmable room thermostat modulating controller (I believe Opentherm) and wonder how these would interrelate and whether it is preferable for efficiency to have both if it is an option...

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...

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...

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...

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...

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...