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I would say I have no doubt that flue is asbestos. Depending on your local authority they may accept it double-bagged and sealed at the local tidy tip, some will not and reject it out of hand. You need to wet it, remove it without breaking it or creating dust then use the correctly labelled bags...

Glad it's sorted

Personal opinion: keep cylinder existing or replaced, flush heating system, if there isn't an immersion heater in the cylinder take the opportunity to get one fitted, replace boiler, straight swap, easy. Any boiler is 20% hydrogen at the moment and hydrogen is currently being injected into the...

Parts do have a habit of changing numbers. Ring spares but I think you have the second version. The cartridge you see for the Lines One is the same across the ranges, they might give a different number but I'm sure that's the one.

Yes, there were changes in the design. You could also ring sales 01727 744000 with the serial number

Yes, I've used Nest ON/OFF and opentherm with the Vibe Max 26C

yes

I hope you'll bear with us otherwise we're swapping between threads to find older posts.

It's tricky to set up weather com because of the above and there are calculations made on the weather data gthat slow things down. I think I'll simply lock the boiler stat to 45 and restrict the flow through the boiler to raise the return temp because if the return is cold then the boiler just...

I just did a couple of videos, one with and one without WC but I can't emulate a house ticking over. Our test rigs get rid of the heat through a plate heat exchanger so it's like a range rated 8kW combi trying to heat hot water therefore the return is so low the boiler is always running at an...

Large bore, no cross welds or manifolds or constrictions. The retarder makes it 2 pass and ensures the flue gases engulf the whole of the tube, throughout it's length.

Look at the book to see if there's an adjustable anti-cycle delay, if so, lengthen it. Also check to see whether the boiler can be range-rated (heating output reduced from maximum (you might need an engineer to do this).

Ignition speed at firing to ensure reliable ignition (higher than minimum) then it rapidly modulates down dependant on the flow and return thermistor readings. Once alight the fan speed can reduce but ignition has to be reliable. Fan speed determines output and that will not rise above 60% of...

Both the software and heat exchanger are different between the Vision S and the Vibe Max. The latest software starts the boiler at 60% of the range rated output and that’s the max for 15 minutes. In that time the flow temperature will modulate but the max output is capped. If demand...

No problem but I always work on the principle the OP is not the only reader.

Yes, pump runs during anti-cycle to stop overheating in the heat exchanger. Wider delta T is more difficult to acheive as the boiler modulates flow temperature as the 'headroom' reduces. A slower pump would help but it wouldn't be much difference to fuel costs.

Any of the boilers you mentioned originally or have been named subsequently will ensure your wife is comfortable. All you have to do is get a good installer that likes the boiler he's fitting and the rest will be plain sailing. As always however, the devil is in the detail.

Using that graph from a boiler with an unusually powerful pump for Vokera on the Y axis you see the available head. Below you see flow rate on the X. To get the flow rate for a condensing boiler installation multiply the specific heat capacity of water by the temperature difference across the...

You do have a point but I try to offer advice and answer a direct question and not simply name a boiler. The advocates of other brands can answer your questions about their suggestions as they have the figures to hand otherwise it's just a model and brand that you have to research yourself in...

We'd have nothing to answer if you knew more:giggle: A three bed semi needs around 8kW. If a combi try to find a boiler that can be range rated to what you need for the heating. Look at the residual pump head for the boiler at 70%. In 15 and 22mm the head loss around a system is under 1.5m...