Suggest gas combi boiler

[Depo]

Hi guys,


I`m looking for ultimate gas combi boiler, for underfloor heating, but struggling to find such. Can you advise? Must have following spec:


1. 24-30kw - 1 bed flat.
2. Stainless steel heat exchanger
3. Minimum of 12.3L/min at 35 degrees
4. Modulation 1:6
5. Minimum efficiency of 89%
6. No more than 40dB when burning at max
7. Consumes no more than 87w when burning at max and no more than 5w when idle
9. Brass/copper instead of plastics inside
10. Does have optional 7 day timer.


Thanks

 

[Depo]

so ?????? its still very energy efferent that all what matters

But its not most energy efficient. The difference is 8.3% from your boilers kw output. It all adds up. I would also like a boiler with passive flue gas heat recovery +it to work in condensing mode for hot tap water as well, but that`s asking too much Then I would need to manufacture one myself.

 

[Depo]

Do you even know the flow rate at the main incoming?

No.

Combis are not the most efficient for under floor due to hot water priority causing temp to drop away.

I`ve read quite opposite. Because UFH requires much lower water temp, boiler works in condensing mode, which is very efficient.

 

[Depo]

What setup do you have at the moment?

Electric heaters and electric shower.

 

[gassafe]

You need the the Ferroli Lamborghini boiler... If there no longer making that you need a Ravenheat...

 

[ShaunCorbs]

You need the the Ferroli Lamborghini boiler... If there no longer making that you need a Ravenheat...

you can pick a colour as well

 

[Depo]

You need the the Ferroli Lamborghini boiler... If there no longer making that you need a Ravenheat...

Lambo not being made any more. Just checked Ferroli top boiler - Modena HE. Not impressed. 27kw uses 100w when burning. No w specified when idle. Also just 11.1L/min@35 isnt anything impressive. Noise level not specified at all. Doesn`t mention if heat exchanger is stainless steel or aluminum.

Ravenheat uses aluminum heat exchanger, not option for me, I only want best Worcester also uses aluminum only, every model.

 

[Depo]

ecotec plus and pro use the same internal components plastic to metal wise.

Vaillant tech rep told me this over the phone - Pro is cheaper because it uses more plastic parts rather than brass/copper.

 

[drip-dry]

Vaillant tech rep told me this over the phone - Pro is cheaper because it uses more plastic parts rather than brass/copper.

Think maybe he just wanted you off the phone
:stooge_moe:

 

[IDCHAPPY]

The boiler you want doesn't exist, you'll have to compromise.

 

[Ray Stafford]

I want a car that seats 7, gives 90 mpg, does 0-60 in 4 secs, has 4WD, 25,000 mile service intervals, costs under £8k and offers a 7 yr unlimited mileage warranty.

All of those features are available. You just can't have them all in the same car.

My personal view is that you are misunderstanding the various claimed features of boilers. BOILERS don't have set efficiencies, except on a test rig. Its the INSTALLED SYSTEM that has an efficiency, and that depends on design, installation, commissioning, controls (both in terms of capability, but more importants user understanding) as well as a host of other issues - apart from the system.

If you will forgive me for saying so, this is a classic case of a little bit of knowledge being a dangerous thing.

 

[dsmart]

You want this stainless steel heat exchanger too

HTH

 

[snowhead]

You want this View attachment 22059 stainless steel heat exchanger too

HTH

Do they do them in Red??

 

[Depo]

You want this stainless steel heat exchanger too

HTH

If you feel very rich, then you can always buy Worcester with aluminum which will corode in few years time. I prefer to make smart purchase to avoid such issues.

 

[ShaunCorbs]

If you feel very rich, then you can always buy Worcester with aluminum which will corode in few years time. I prefer to make smart purchase to avoid such issues.

you wont have more than 10 - 12 years out of your boiler these days (combi) realistically

 

[Depo]

You can predict future?

Still - why would you buy inferior boiler if you have choice of other better ones?

 

[ShaunCorbs]

You can predict future?

Still - why would you buy inferior boiler if you have choice of other better ones?

nope just going on current models and there not inferior main brand boilers

 

[Depo]

Worcester has aluminum heat exchanger, consumes more electricity, noisier. You don`t call it inferior?

They are hugely popular because installers can make more money on them +they invest ton of money in marketing. It doesn`t make boiler itselft any better.

 

[Dotty]

Why are you arguing the toss with guys who fit and work on these things day in, day out?

 

[Depo]

This is not an argument, but discussion - whole idea of such forum. Facts are facts, I have compared boiler specs.

And why installers fit Worcester? Because parts are widely available, better profit margins compared to other makes, better tech support maybe. But again - it doesn`t actually mean its best boiler out there. I can understand its not easy to accept this fact, because you might be fitting 10 Worcesters a week.

 

[ShaunCorbs]

Worcester has aluminum heat exchanger, consumes more electricity, noisier. You don`t call it inferior?

They are hugely popular because installers can make more money on them +they invest ton of money in marketing. It doesn`t make boiler itselft any better.

there not nosier,alu conducts heat better and doesnt matter if alu or ss both do the same and work in the same principle, and i bet if you ran each make of main man boiler you wont find much difference in elec cost

 

[gasmanrob]

Ermintrude?

 

[ShaunCorbs]

This is not an argument, but discussion - whole idea of such forum. Facts are facts, I have compared boiler specs.

And why installers fit Worcester? Because parts are widely available, better profit margins compared to other makes, better tech support maybe. But again - it doesn`t actually mean its best boiler out there. I can understand its not easy to accept this fact, because you might be fitting 10 Worcesters a week.

i can get parts for any boiler within a couple of days so that doesnt come into context to that, viessmann commercial i have found have the best tech support so far, and not greater profit margins as there getting other quotes from people installer other boilers eg ferroli, Vokera, and Aristons just to name a few

 

[gasmanrob]

This is not an argument, but discussion - whole idea of such forum. Facts are facts, I have compared boiler specs.

And why installers fit Worcester? Because parts are widely available, better profit margins compared to other makes, better tech support maybe. But again - it doesn`t actually mean its best boiler out there. I can understand its not easy to accept this fact, because you might be fitting 10 Worcesters a week.

Just going to bat this away sharply Worcester have an awful profit margin for the installer.

I haven't read the whole thread nor do I intend to but personally Worcester are far from the best boiler out there.

 

[Depo]

there not nosier,alu conducts heat better and doesnt matter if alu or ss both do the same and work in the same principle, and i bet if you ran each make of main man boiler you wont find much difference in elec cost

But within few years you will have to replace it.

How 45 against 38 dB is not noisier? You might think some 25w is not a big deal. But how much in terms of money is that let`s say over 5 year period? A lot.

HE +extra consumption = not the best deal. If Worcester would cost something like 20% less compared to others - yes it would make sense, but it doesn`t.

 

[IDCHAPPY]

Worcester and profit in the same sentence is non compatible. Have you checked the price of them?

 

[ShaunCorbs]

But within few years you will have to replace it.

How 45 against 38 dB is not noisier? You might think some 25w is not a big deal. But how much in terms of money is that let`s say over 5 year period? A lot.

HE +extra consumption = not the best deal. If Worcester would cost something like 20% less compared to others - yes it would make sense, but it doesn`t.

how do you know them figures are right/ same conditions unless there in the same room test is invalid

 

[Depo]

Yes I have checked everything - specs and prices. They all cost pretty much the same, but specs do vary.

 

[Depo]

how do you know them figures are right/ same conditions unless there in the same room test is invalid

Building Energy Performance Assessment - Support Website : Search

 

[ShaunCorbs]

Yes I have checked everything - specs and prices. They all cost pretty much the same, but specs do vary.

have a look at ideal logic then and you will see what i mean

 

[Depo]

have a look at ideal logic then and you will see what i mean

In terms of what? Spec, price?