Vaillant ecoTec 937 Boiler

[D_Hailsham]

An unvented cylinder powered by an an Advanta 18s will give you a much better system, and cost considerably less to run than a 40Kw monster.

You have forgotten that the OP said: "I was also looking at putting a room in the loft so another rad would be added (so that gets rid of the tank in the loft and the hot water cyl).

A 937 with such a small water store will not give 20 litres a minute for very long at all. I think it drops to around 14 litre per minute when the store is cold.

Exactly the point I was making; and I would not call the 937 a

"medium sized combi"

The 937 is another example of the "here's the solution, what's the problem" syndrome.

 

[doitall]

An un-vented cylinder can go virtually anywhere, including the basement, and even a purpose built plant room outside.

 

[morrismini]

An un-vented cylinder can go virtually anywhere, including the basement, and even a purpose built plant room outside.

They are expensive as they are, without having to build a plant room for them.

D_Hailsham, good post. I am not impressed by the 937. It is also massive for what it is. Very expensive.

 

[morrismini]

An unvented cylinder powered by an an Advanta 18s will give you a much better system, and cost considerably less to run than a 40Kw monster.

Anything above 1 bathroom then forget a combi, even if it will supply the how water, it's never going to modulate down to match the heating load.

Perhaps more important is two girls in the house when it breaks down and you find you have no back-up hot water.

This is a misleading post. There are two bathroom combis around that are cheaper than the setup recommended here.

Back up can be accommodated by a cheap electric instant heater.

 

[D_Hailsham]

An un-vented cylinder can go virtually anywhere, including the basement, and even a purpose built plant room outside.

Missed the "unvented" bit. Though, presumably, the OP wants to dispense with the cylinder altogether and I doubt if he has either a cellar or an outside plant room. A two-bed, two-bath house sounds more like a modern or refurbished terrace to me.

 

[gonzoelec]

Well I back again and what interesting posts you have all been putting and thanks for all of the advice. My house is a humble 2 bed with 2 bathrooms one is an one suite, the house was built in 1900 (lucky that it's still standing lol), it hasn’t got a cellar or an out building to put the boiler in and yes I will be putting a room in the loft so that’s why the boiler cant go there. Ok I'm now quite confused as to what I should be looking for in a boiler for the needs that I have asked, I think that Vaillant boilers are good and that’s why I'm looking at them, the other problems that I have it that all of the pipe work in the house is 15mm going to CH and HW, guess that this will slow the warm up of the house down? Sorry guys bit I'm well confused over it all now but thanks for all the advice that you are giving and all of your time that you are spending on this with me, I really appreciate it

Thanks

Dave

 

[morrismini]

An un-vented cylinder can go virtually anywhere, including the basement, and even a purpose built plant room outside.

They cannot go in the basement as the discharge pipe has to be above ground level.

 

[doitall]

An un-vented cylinder can go virtually anywhere, including the basement, and even a purpose built plant room outside.

They cannot go in the basement as the discharge pipe has to be above ground level.

Don't talk Drivel DrDrivel

If there's a drain then you can run into that.

Back to the book boy.

 

[morrismini]

An un-vented cylinder can go virtually anywhere, including the basement, and even a purpose built plant room outside.

They cannot go in the basement as the discharge pipe has to be above ground level.

Don't talk Drivel

The only drivel is from you. Only if a drain is there and the pipe has to be the high temperature plastic..

 

[kevplumb]

if its in a basement

theres more chance of it being cast or salt glazed than plastic

 

[morrismini]

if its in a basement

theres more chance of it being cast or salt glazed than plastic

You obviously don't know about HepVo traps and high temp plastic pipe.

 

[kevplumb]

no never heard of hepvo traps

or high temp plastic

or tracpipe

or solvent weld

or ultrasonic welding / cleaning

just a plain o'l country boy me

 

[morrismini]

no never heard of hepvo traps

or high temp plastic

or tracpipe

or solvent weld

or ultrasonic welding / cleaning

just a plain o'l country boy me

It shows. Again, a totally non-constructive post cluttering threads.

 

[gonzoelec]

Hi guys

Some interesting comments but not being up on hepvo traps and tracpipe is all a bit foreign to me and still doesn’t help with my original question about 7 posts ago, please could someone get us back on track,

Thanks.
Dave ;0)

 

[morrismini]

Hi guys

Some interesting comments but not being up on hepvo traps and tracpipe is all a bit foreign to me and still doesn’t help with my original question about 7 posts ago, please could someone get us back on track,

Thanks.
Dave ;0)

Avantaplus 39C with the outside weather compensator temperature sensor.