As said you get what your given to a certain degree. The scheme offers free boilers and upgrade anything that is required under part L. Trvs and controls is about as far as it goes. The money is paid on the energy savings you could potentially make. Replacing your cylinder will not make a significant enough saving to warrant the work, although I'm sure you could pay for them to do it at the same time for a reasonable cost.
i wouldn't get to hung up about the cylinder, if required it can be replaced fairly simply at any point.
You have obviously satisfied the eligibility criteria for the eco funding so there is nothing to stop you shopping around as it were if you are offered a boiler you don't want. There is no guarantee you'll get what you want though as the funders normally enter an agreement with a boiler manufacturer before offering the funding out.
Out of interest, where are you?
i wouldn't get to hung up about the cylinder, if required it can be replaced fairly simply at any point.
You have obviously satisfied the eligibility criteria for the eco funding so there is nothing to stop you shopping around as it were if you are offered a boiler you don't want. There is no guarantee you'll get what you want though as the funders normally enter an agreement with a boiler manufacturer before offering the funding out.
Out of interest, where are you?