100KW gas boiler for domestic install!

[snowhead]

Replacement Boiler Size Calculator

Using the above you don't need room sizes, just outside wall sizes.

If you oversize it, use all the worst window and insulation choices, pick Scotland as location, it comes in at 40kw.

To get 100kw you need a 20mtr square, 4mtr ceiling, 2 storey metal single glazed, flat roof building in Scotland with 15kw allowance for water.

 

[Dannypipe]

OK, this might not be helpful, but here's some laymans terms

Victorian, converted train station. New boiler (30KW)




Very large (modern) country house. 70KW (Two, sequenced, low loss header and zoned).


Tudor house, large - 45/50 KW (single boiler, zoned)

Internal, of tudor house, showing the manifold and zones.

1970's (ultra modern for the time) house. Two cascaded boilers, on a low loss header. With an additional boiler for the pool. Can't remember sizes, but no where near 100KW. Think about 50KW in total, but split over two boilers and sequenced to reduce wear and tear.

I know these are just photos but it shows you what 100KW's is in laymans terms.

 

[infromthecold]

thanks very much for that. certainly puts it into perspective. very impressive installs!

 

[Dannypipe]

No problem. I haven't shown the installs, really. But I think it puts 100KW into perspective, so you can weigh it up against your own property and see if your installer is talking any sense.

Remember Worcester will be quite happy to sell you a bigger boiler. It's the installers job to specify it, not theres.

 

[lame plumber]

how did you get all that lot in your van! tidy work old son pat on back time

 

[Dannypipe]

LOL! Thanks. Now you see why I need a bigger van.

It's not just my work. The guys I work with are brilliant, and know their stuff inside out.

 

[Deleted member 32524]

LOL 100kw!!

 

[Rob Sale]

he must mean 100'000 btu's

 

[stevetheplumber]

OK, this might not be helpful, but here's some laymans terms

Victorian, converted train station. New boiler (30KW)

View attachment 10687

View attachment 10688
Very large (modern) country house. 70KW (Two, sequenced, low loss header and zoned).

View attachment 10689
Tudor house, large - 45/50 KW (single boiler, zoned)

View attachment 10690Internal, of tudor house, showing the manifold and zones.
View attachment 10691
1970's (ultra modern for the time) house. Two cascaded boilers, on a low loss header. With an additional boiler for the pool. Can't remember sizes, but no where near 100KW. Think about 50KW in total, but split over two boilers and sequenced to reduce wear and tear.

I know these are just photos but it shows you what 100KW's is in laymans terms.

not bad for a monday what you got on tommorrow ?

 

[Dannypipe]

Got a bog to unblock Steve....and no gloves.

 

[bewsh]

100kw is massive, can't imagine you'd need that size! I wouldn't want to go for a combi with that size house mind. Unvented system would do the job!

 

[Howsie]

I know why he said 100kw. How deep is your pool?

 

[leethegasman]

was it this one, Is some one else getting kw and btu mixed up again hopefully they will not get as far as hanging it to the wall.

 

[josh]

haha nice pic, where do people get theese figures from, with a larger house with system boilers i'd watch the expansion vessel, we normally fit heat only boilers for larger properties, that being one of the reasons.
See my pics for examples aswell.

 

[Dannypipe]

Josh, some really, really great work on there. Nice one.

 

[infromthecold]

Right I have been to house and measured the rads. All are Quinn double convector details listed below. Need 34KW to drive the rads so not 100KW. Can anyone recommend a boiler with correct capacity?

Cheers

Rad Size	Power	Number	Total
1800x600	3497	1	3497
1400x600	2720	6	16320
1200x600	2332	3	6996
1100x600	2137	1	2137
1000x600	1943	1	1943
800x600	1554	1	1554
700x600	1360	1	1360
		14	33807

 

[Howsie]

Get your new installer to do that. Bin the current guy.

 

[Rob Sale]

Right I have been to house and measured the rads. All are Quinn double convector details listed below. Need 34KW to drive the rads so not 100KW. Can anyone recommend a boiler with correct capacity?

Cheers

Rad Size	Power	Number	Total
1800x600	3497	1	3497
1400x600	2720	6	16320
1200x600	2332	3	6996
1100x600	2137	1	2137
1000x600	1943	1	1943
800x600	1554	1	1554
700x600	1360	1	1360
		14	33807

Advertise on the section of the forum saying I'm looking for gas engineer/plumber wanted. [DLMURL="http://www.ukplumbersforums.co.uk/im-looking-plumber-gas-engineer/"]http://www.ukplumbersforums.co.uk/im-looking-plumber-gas-engineer/[/DLMURL][/B] and get a decent guy down . bin the current guy.

 

[infromthecold]

I spoke to engineer today to say about 34kw load so why such a large boiler and he said he had a TSM from Worcester attending site tomorrow. I didn't know they had such a service so I called Worcester and they do indeed have such a service. I spoke to technical pre-sales asking for an opinion or insight and they said they couldn't give definite answers without seeing everything.

One thing they did mention is heat loss in the pipe work if the lengths are long.

Can this be so bad that it needs a lot of extra power in the boiler to compensate?

Do all the rads go on one loop?

Any insight or suggestions gratefully appreciated.

Cheers

 

[TBServices]

Just forget this guy ever mentioned 100kw. It's now irrelevant. I think I'd be looking for a new installer tbh.

 

[kirkgas]

You will only need a 100kw boiler if you intend to turn the house into a marajuana factory to supply your whole town
Get someone else in to suss it out, very rule of thumb is 2.5-3.5 kw per room ( this allows for variables of room size) as a quick calculation, so a 100kw will do about 30 rooms haha
As suggested go with a system boiler and unvented cylinder you won't regret it

 

[dancinplumba]

100kw of lights will do a lot of plants and the heat off them will mean you wont need a boiler

 

[Dannypipe]

How come you two seem to be experts in growing weed?

No wonder you're both such chilled characters. Roll us a duuuuuby!! LOL.

 

[Rickster123]

How come you two seem to be experts in growing weed?

No wonder you're both such chilled characters. Roll us a duuuuuby!! LOL.

I knew kirk didn't buy that Lamborghini from working in the training centre!

 

[kirkgas]

I've never tried it, but I've been in 100's of houses where they were smoking it, and one many years ago in a multi storey flat in Glasgow which we got called out to in the middle of the night flooding flats below, police got called to attend for forced entry and the whole flat was full of ants, with a 10" gap path to walk round the whole place, the heat lamps were rigged of the power for the lift and the temp was sky high, as soon as the joiner opened the door the smell hit us and the cop radio 'd in for the drug squad, brilliant engineering and workmanship to set it up haha
Don't mention the Lambo it's away back and now I'm bored and invisible I'm my XF Jaguar haha