What size boiler

[kazzieanne]

Hi, I hope someone can help. I had a new boiler installed 15months ago by British Gas. They installed a Baxi 15KW boiler. My house is an old 1894 build, 6 bedrrom,3 bathrroms over thress floors, Yesterday the boiler wouldnt work so i go an independant fitter out to repair as my warranty with BG was only for 12months. He advised that the boiler installed wasnt effiecent enough for this size house. He said that i should of had fitted a 30KW boiler.. is he correct and do you think BG have installed the wrong boiler?
If they have i want them to change it, i feel i have been miss sold a product.

Hope to can help.

Karen

 

[Whitespirit66]

You've had the boiler 15 months, so hopefully you will know whether it was up to the job or not by now. Big jump, doubling the size of a boiler.

You can get an idea of what's needed by doing some calculations.

http://calculators.baxiknowhow.co.uk/boiler-sizing/

 

[ianmcd]

If your home has been warm enough for the last 15 months and your HW requirements have been met then you dont need a bigger boiler, even if your boiler was undersized it would not be the cause of your breakdown

 

[kazzieanne]

Hi,

Thanks for responding. My radiators take at least 30min to warm up and it take approx 4 to 5 hrs to get the room temp from 15 to 19.,, is that normal ?.

 

[algas]

15kw does seem undersized for your property, what we don't know is the level of insulation you have.

 

[dcawkwell]

A rough guide is 1.5kw per radiator. If you have 10 radiators about 15kw will be ok.

Personnally would have gone larger.

 

[kazzieanne]

Hi,

Thanks all again...

I have 14 rads in the house. I do have loft insulation, but nothing in the walls as they are solid.

 

[D_Hailsham]

Use the calculator in an earlier link and you will find out what size boiler you should have.

Until you do that, we are just guessing.

 

[kazzieanne]

Hi,

OK, i went through the Baxi calculation and it said heat required 259.3 KW,
does that help?

 

[bolshy]

Not really
Your decimal is in the wrong place
Your boiler is undersize

 

[CBF]

2593 Kw are you sure bolshy, that's a big house & boiler req

 

[bolshy]

 

[D_Hailsham]

OK, i went through the Baxi calculation and it said heat required 259.3 KW.

259.3kW is definitely wrong.

Give us the info you entered into the calculator and we will check the calculation.

 

[ianmcd]

You definately do not need 259.3 KW unless you live in Buckingham palace