Hi All,
Five years ago we had a loft conversion in our house, so the open vented CH/water system was replaced with an un-vented sealed system. This entailed removing the water storage tank from the loft, replacing the hot water storage cylinder with a sealed cylinder, and having a pump, expansion vessel etc. installed in the airing cupboard. However we kept our original boiler (an Ideal Classic NF50, which is installed in the garage).
We have now decided to replace this boiler under the scrappage scheme for a more efficient boiler. My question is, should we replace with a conventional boiler or a system boiler? Are there any advantages/disadvantages to either approach with regards to our current installation?
My understanding is that if we went the conventional condensing boiler route then it would just be a matter or swapping our existing boiler for a boiler such as the Vaillant 428. If we go the system boiler route, then we would be looking at a Vaillant 624 model, but would that mean removing the expansion vessel, pump etc from the airing cupboard? Although this would free up a bit of room, I guess it would make for a more expensive installation, as well as perhaps making maintenance more expensive, as it may be cheaper to replace an external pump than one built in to a system boiler.
Any opinions as to which would be the best route to go down? If there are no serious advantages going with the system boiler route then the higher capacity, and cheaper cost, of the Vaillant 428 boiler might be the deciding factors.
Thanks
Jon
Five years ago we had a loft conversion in our house, so the open vented CH/water system was replaced with an un-vented sealed system. This entailed removing the water storage tank from the loft, replacing the hot water storage cylinder with a sealed cylinder, and having a pump, expansion vessel etc. installed in the airing cupboard. However we kept our original boiler (an Ideal Classic NF50, which is installed in the garage).
We have now decided to replace this boiler under the scrappage scheme for a more efficient boiler. My question is, should we replace with a conventional boiler or a system boiler? Are there any advantages/disadvantages to either approach with regards to our current installation?
My understanding is that if we went the conventional condensing boiler route then it would just be a matter or swapping our existing boiler for a boiler such as the Vaillant 428. If we go the system boiler route, then we would be looking at a Vaillant 624 model, but would that mean removing the expansion vessel, pump etc from the airing cupboard? Although this would free up a bit of room, I guess it would make for a more expensive installation, as well as perhaps making maintenance more expensive, as it may be cheaper to replace an external pump than one built in to a system boiler.
Any opinions as to which would be the best route to go down? If there are no serious advantages going with the system boiler route then the higher capacity, and cheaper cost, of the Vaillant 428 boiler might be the deciding factors.
Thanks
Jon