100kw domestic boiler

[costskeeprising]

Hi All

New member and first post.

Hoping folks on here with all the knowledge can assist.

Got 5 bed victorian house that has no central heating so in process of getting boiler and rads spec'd.

Have been told that will need a 100kw boiler and that this boiler will need a a larger gas supply pipe even though there is 22mm already.
Was hoping for a combi as there is only one bathroom with shower over bath.
Room sizes (in metres) are listed below, All double glazed with solid walls but I calculate heat requirement at 25KW so where the 100KW comes from I have no idea hence this post.

Hope someone can help or offer advice.

Cheers

Room H W D
Living Room 3.1 5.49 4.88
Sitting Room 3.1 4.22 3.91
Dining Room 3.1 3.23 3.12
Kitchen 3.1 5.18 4.47
Bed 1 3.1 4.42 3.2
Bed 2 3.1 4.42 2.29
Bed 3 3.1 7.21 3.56
Bed 4 3.1 3.86 3.23
Bed 5 3.1 4.27 4.11
Bath 3.1 4.42 3

 

[Whitespirit66]

100Kw

You need to do the maths.

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

 

[plumbplumb]

Not very domestic 100kw

 

[plumbplumb]

Hi All

Have been told that will need a 100kw boiler and that this boiler will need a a larger gas supply pipe even though there is 22mm already.

and meter

 

[blacknesh]

Sure he meant 100.000 btu not kw

 

[costskeeprising]

100Kw

http://calculators.baxiknowhow.co.uk/boiler-sizing/[/QUOTE]

Thanks for the link. Put the details in and it calculates requirement at 25.9KW.

So closer to my calculation of 25KW and not the engineers calculation of 100KW.

Has anyone ever known such a powerful domestic install. Surely 100KW is enough for a school not a 5 bed house?

 

[costskeeprising]

Sure he meant 100.000 btu not kw

that's what I thought so asked for confirmation and was told 100KW.

I imagine something like 15 rads will go into this system so if they are driven by a 100KW boiler do they make rads that are physically that big

 

[blacknesh]

They could do a factory with offices needing this kind of kw, the rads would be normal sizes just lots of them, the biggest boiler I ever fitted was a 42 kw, as a domestic installer you can't exceed 70 kw anyway, you asked
him if he's gas registered?

 

[Agile]

I expect that he meant 100k BTU but is a nupty who does not understand the units properly.

he might still be able to do a reasonable installation but I woudl be very careful with him!

Still need an upgraded gas supply unless very short distance to meter!

Tony

 

[snb]

They could do a factory with offices needing this kind of kw, the rads would be normal sizes just lots of them, the biggest boiler I ever fitted was a 42 kw, as a domestic installer you can't exceed 70 kw anyway, you asked
him if he's gas registered?

with oil there wasn't an upper limit until last year and now it is 45kw then you need the commercial qualification

 

[blacknesh]

45kw, didn't realise? went did that come out, as last I knew it was 70kw and pipe sizing no bigger then 35mm?

 

[Dan Robinson]

Oil nesh - not NG...


And for the OP - 100kW get some one else mate - this guy is a total ******** (cheers DM).

 

[blacknesh]

Yer clearly didnt read it correct, but why bring oil into it to confuse matters.