Need some help, gota put central heating into my house i just bought, but there's so many boilers i not sure. Just thought i go get a combi and bob's your uncle!

There's no central heating in the house at the mo so need it to heat that, heat hot water, theres no room for a hot water tank, but i want constant hot water dont want to be having a shower and someone's turn tap on down stair's and next thing you no its a cold shower, heard but mega flows not sure what they do!

Any help??

 

yeh you need to measure how many litres per min, turn everything on(well within reason) and measure it.

where is the boiler?

im sure there some people on here that now quite a bit about boilers , i would go for a condensing combi that produces its own hot water with something like a 50l tank, you will heat hot water in no time.

 

Get a combi or a condenser boiler - do a search i did other day and read up on issues.

 

Ive just had the very same done as your asking about. A house with nothing in. We used a Glowworm Flexico 30 cx condensing Combi boiler.
Its very quiet, really quick and simple to use. A Rated energy efficiency and the smallest physical size avaliable so it will fit in a standard 400 mm cupboard.

the reason we used that particular one os the fact it is rear venting so we could have it in the floor level cupboard and not on show as our wall ounted units arent the conventional shape.

 

Combi boilers aren't too good for running showers and won't do baths. You'd have to get an electric shower. Condensing boilers are most efficient when used with radiant heat ie underfloor heating/wall heating. When used with rads they basically use the same fuel as a standard boiler.

 

Have a look on here: http://www.diynot.com/forums/viewfor...56b9bf4dd91cfb


They can help loads on deciding what to get. If your having a combi it now has to be a condensing type, you will have to get a room stat and trv's on all your radiators. Go for one with a flow around 20L per min otherwise it will take ages to fill a bath. Not many cobis can run two taps at once, you need a thermostatic shower so you wont get burned when someone turns on a tap while your in the shower. Find one with a tank built inside it, that way hot water is nearer instant. Dont expect the water to be really hot when running a bath, combis raise the temp to about 40 degrees while a tank system gets to 60 degrees.

 

A combi boiler wont do bath's?

Explain please?

 

My combi does baths!

 

And mine does.. I have a vailant... runs my aqualisa shower fine too.. excellent pressure

 

Combi boilers wont do baths? We must have put the wrong systems in a few hundred houses the last couple of years then lol

 

Jesus, keep your fookin hair on!! OK prob should've put the word effectively after "baths". You guys who find you have a good system with the combi for bathroom/en suite/WC prob have a storage combi or else about 8bar in the mains. Can't see how you'd get a good supply from a 3/4" bath tap fed by a 1/2" supply otherwise. And I'd be surprised if you get much more than 5 years from the boiler. If your drawing off 30gls of hot water you ain't getting any heat to your rads as the hot water gets priority. Personally i wouldn't fit them anywhere other than an apartment or small dwelling. IMO cant beat pumped storage and a pressurised cylinder. Then you'll get a good hotel style shower!!

 

Agreed

 

Now im even more confused haha, cheers for your thoughts lads, i shall do some more researching!

 

from your first post you say you want hot water, you don't want it to die if someone turns the tap elsewhere. therefore imo a combi is out of the question unless like has been stated you have mega pressure, down where i live your lucky to get 2 bar so a tank is needed

 

As for make... go for a Vaillant....

 

i would recomened baxi's, worcesters and pottertons DO NOT i reapeat DO NOT get a Ideal they are totally shite and i'm sick of fixing them

 

That's part of the curriculum on the pluming apprenticeship. How to confuse the client! You can charge them double then!!

 

the point with combi's and baths is that often bath taps flow more water than the combi boiler can properly heat. not a problem, just don't turn the hot tap on full

 

Or fit a pressure reducing valve at the mains and set it to the designed litres per minute flow rate as stated by the manufacture!

 

that is why you are a plumber and i am not

 

we don't all want to wait 30 mins to runa bath tho.

 

Vokera condensing combi if you are on a budget or Bosch Worcester if you want the best (imo)

 

Fit a Valliant 831 or 837 for a bigger house....

Superb Combis and i have fitted LOADS of them

 

i fit a glow worn 30cxi to my mums house, it feeds 12 rads, and an old victorian cast roll top bath that takes ages to fill coz of its size but once you get in you come out a lobster, mega boiler though!, and suprisingly easy to fit c/h im only a mechanic but hey its not rocket science!

 

[quote=richard youll;3200692), it and suprisingly easy to fit c/h im only a mechanic but hey its not rocket science![/quote]


Shhhhhhhhhhhhh, dont tell eveybody. LOL

 

piece of piss to fit - officially you just need a CORGI registered geezer to connect the gas (but that is not rocket science either)

but there's more to it than that. a good plumber has the skills to size the boiler properly in the first place etc

 

Just read up bout this boiler sounds like what im after, do they have a good supply of hot water then, prob be heating 10-12 radiators as well hot water! Prob gonna have to bathrooms both with shower's(maybe only 1 shower yet), one with a bath!

 

Is this one any good as i get %20 off at B & Q ? How many KW or BTU do you need for a normal sizes semi , how much is it to fit a boiler only as mines getting changed ? dont need rads etc

http://www.diy.com/diy/jsp/bq/nav/na...&isSearch=true

 

its easy to find out what size rads you need, there is a way to determin what btu rad you need per room, add them all up, then you know what size btu boiler you need,

 

can you tell us more on how to calculate this?

 

There is a calculator for this. What determines it is room size inc height of ceilings. Type of floor, concrete timber or otherwise. Number of outside walls. Your plumbing supplier should work it out for you if they're any good.

 

just do a search for btu calculator in google and fire away, also try the likes of mrcentralheating.com sometimes can be competetitive for complete packages ie pipe work rads and a boiler for under Ł800 (obvious for the cheepest)

 

If it's a larger, older house with quite a large heat load you could also go for micro CHP and generate some eelectricity at the same time..........

 

a combi bolier is excellent for a shower and central heating the problem comes with the time it takes to fill a bath with hot water but how many people actually have a bath these days don't they tend to have a quick shower.
It all depends on what you are used to.

 

i have a shower in the morning and have a bath just before bed, fooken hate showers

 

There's no mains gas here but a neighbour has an electric boiler. Anything to be aware of with these?
He gets much lower bills than me with my storage heaters which we don't like so I'm tempted to change but don't want a oil or gas tank outside.

 

i just had a worchster bosch 42cdi fitted a couple of weeks ago, very happy with it and the shower (mira excel) is almost painful if you turn it up full blast, fills the bath quick enough but not as fast as my old storage system...but you never run out of hot water either

 

n i thought this was going to be abput some dirrty girlies!