Question re new boiler to any Corgi installers

moozie_2

Sadly our current boiler which came with the house we bought less than 2 years ago, has packed up.

I am doing some research into our options and so far, we have had a quote for £1,350 from a plumber for a 30kw boiler - no other information on it.

I have also been looking at a recent article on Which about boilers and one of their best buys is Ariston Genus HE 30FF. We can buy this for £801 but the closest installer is 45 miles away. I am thinking it is unlikely they will want to come out to us so my question is can I approach any Corgi registered installer and ask them to install it? Also, what other parts will we need to get to complete the installation?

Any help/info would be greatly appreciated.

Canucklehead

Good morning: Any CORGI (with certification for boilers...not all have this) can fit any domestic gas boiler so you could find someone local to do the deed. I would take what you have read in the Which report with a grain of salt. If you take a look thorugh this forum you will discover that many MSErs have opted for Vaillant or Worcester Bosch boilers. The OH installs Vaillant and Viessmann products but every CORGI has his or her favourites for which they might have manufacturer's training /extensive experience with installation, servicing and and repair of those products. Discuss your requirements with a CORGI and ensure your preferred installer will agree to fit an appliance etc. supplied by you.

HTH

Canucklehead

blue70

Canucklehead

Perhaps you could also answer a question for me. I am looking for a new boiler to replace an old Ariston Combi that is going when some building work is completed. I've already looked at a few of the boiler/building calculators which state that I need 12kw to provide heat (incl 2kw for hot water).

I want a combi condensing boiler but the only thing that concerns me is the flow rate and ability to run two showers at once. This probably won't happen too often but it's the most taxing thing that the boiler will have to do that I can think of.

Some info that you will probably ask-
Five bedrooms detached house, part solid wall part filled cavity (extension), DG all round, 120mm loft insulation, one bath, two showers (power showers that require minimum of 1 bar to operate).

Any advice would be appreciated
Thanks

Canucklehead

Good evening: blue70... The combi route depends on your mains water pressure and flow rate but even the most powerful combi could struggle to supply two showers simultaneously.... the Worcester Bosch 42 CDi or 440 Highflow ,Vaillant Ecotec 937 and the Viessmann 333 are all possibilities (the last 3 are storage combis). However, for optimum DHW performance your best option is an unvented cylinder/regular condensing boiler combination. Did you use the Energy Saving Trust boiler sizing calculator to estimate your heating requirements? You can find installers on the manufacturer's websites who have had product training and can offer longer warranties.

HTH

Canucklehead

blue70

Canucklehead
Thanks very much for your quick reply.
Coincidentally the first three boilers that you mentioned are all ones that I looked at yesterday. I was erring towards the 42 CDI because it's more compact that the 440 and has a slightly higher flow rate than the 937.

I used the boiler calculator found here http://www.sedbuk.com/whole_house.htm I think it's the same one? I did try another one as well and it worked out about the same.

I know that a cylinder would be better for supplying the pressure for two showers (as they could be pumped as well) but it has the disadvantage of being limited to the amount of hot water in the cylinder. Am I right in thinking that once it's run out you need to heat up a new tank and then keep it hot? Does this make it more expensive and less energy effiecent than a combi or is it about the same?

I haven't had any problem with the combi that we have had for the last few years but we have only been running one electric shower and in a couple of weeks there will an extra ankle biter (2 adults & 3 kids in total) so obviously our needs are going to be slightly different.

Sorry but my knowledge of boilers is very limited - Never had to buy one before!!
Thanks

Ps Is there anyway that I can measure the mains water pressure or does it need an expert?

blue70

Ps again, presumably a storage combi means that it stores hot water internally like a cylinder and therefore has higher pressure? Is this better than a normal combi and how does it compare to a cylinder?

Canucklehead

Good afternoon: An experienced CORGI (after conducting a site survey) would be best placed to advise you. The EST has an excellent guide on the specification and installation of gas central heatig systems. Another good source of info from a CORGI's point of view can be found here ....he explains everything in layperson's terms.;)

HTH

Canucklehead