Intergas xtreme 36 ok?

[hard-work]

No he hasn't

Nothing can be decided nor suggested correctly until flow and pressure is established ..... simples!

You have trouble in comprehension. I have pointed to the areas you need to get up to speed.

 

[Madrab]

really so where are the figures that state pressure and flow?? Until that's known .... it's all lalala .... and I'll let the OP decide who to listen to ...

 

[hard-work]

really so where are the figures that state pressure and flow?? Until that's known .... it's all lalala .... and I'll let the OP decide who to listen to ...

You have trouble in comprehension. You have added sweet FA to the OPs problem, except suggest plumbers have magic wands that can make space for unvented cylinders.

What we have is entrenched views from the likes of this guy, and the, let's-stay-with-what-we-know attitude. As is so often the case. They do not even bother to keep up with new developments.

 

[Dan Robinson]

really so where are the figures that state pressure and flow?? Until that's known .... it's all lalala .... and I'll let the OP decide who to listen to ...

You are talking to a moron that thinks two combis in a small house is a good idea.

 

[hard-work]

You are talking to a moron that thinks two combis in a small house is a good idea.

Great, Dannyboy is coming with "moron" now. Just what we want. How big is the house Dannyboy? Can one of your 13 litres/min Intergas combis do its two bathrooms? I will let you into a secret, you size combis on the DHW demand.

 

[Madrab]

yeah for sure @Dan Robinson , and then it falls into put downs and retoric .... but anyhoooo ...... OP

@bobbidill ... as this is an open forum on a DIY site then of course it's totally up to you to decide on which information you wish to use and then decide on how you wish to proceed at the end of the day.

 

[Razor900]

At a DHW Flow Rate of ΔT 35°C litres/min = 13.50
Are you having a laugh! That is going to do two bathrooms is it? Struth! Then all the zone valves, piping and wiring you need to split the systems, which takes up spaces and gives complexity.

I hope you do not design systems. If you are attempting to push Intergas boilers, do not comment on these things as they will all run.

Try and belittle people all you like. It's obvious that you are a fool

@Dan Robinson pretty conclusive that big burner/water systems is back now don't ya think?

 

[hard-work]

@bobbidill, The advice given is:

1. One says, get a plumber with a magic wand and he will make space for an unvented cylinder. Your UFH and the rest is not addressed. No Kidding.
2. One says, fit a 13 litres/min combi for your two bathrooms. No kidding.

No kidding.

 

[Razor900]

You only fool is you. A 13 litres/min combi can do two bathrooms? Did the Dole give a crash CORGI course? No one who anything about heating would write what you wrote.

Would you like to rewrite that in English?

If there's room for two boilers there's room for a cylinder under a boiler.

You may think you're clever but you are just proving how stupid you really are and giving bad advice as well. Your set up will also be less efficient on the heating side

 

[hard-work]

If there's room for two boilers there's room for a cylinder under a boiler.

The OP says there is not. And you say a 13 litre/min combi can do two bathrooms. You did.

I am a lot clever than you for sure. When I write about something take note.

 

[bobbidill]

Manifolds are used in new builds in France. They acts as balancing the system and quicker HW to taps as the pipe can be 10mm to kitchen and basins. Each pipe from the manifold can be flow regulated at the manifold and isolated if need be. You can do without manifolds of course (they may take up space), however the pipes will need to be a generally larger bore.

With two combis you divide and rule. Two combis gives simple zoning. In your case you could have one doing UFH only, set to say 45C flow temp for the floors, which would be running very efficiently being at a low temp. The other, the rest of the upstairs rads, set to a higher flow temp of 60C or so. Simple.

Have one combi do one bathroom, one the other. Simple. However, join the DHW outlets of both combis for the bath taps (using check valves so one combi does not influence or backfeed on the other) - filling the bath will have both combis full on. When having a shower in one bathroom, anyone having a shower in the other is not affected.

http://www.builderdepot.co.uk/inter...qdKC_LbNvNvF1KwnIW71RrnqssZOGItgaAjmSEALw_wcB

Inc VAT: £590.40, for two double it of course. Could get a deal with the supplier for buying two. No expensive space consuming extras such as cylinder stats, zone valves and all the associated pipework. The Intergas Rapid comes with integrated time clock and even weather compensation if you want to use it. So the UFH can be on and the rads off, and they can come on and off at different times being independent of each other. Multiple combis is perfectly suited for your requirements.

Doing it this way you divide and rule. You are eliminating complexity.

Thanks for the manifold explanation Hard-Work and for the cost breakdown. More to consider!

 

[bobbidill]

Ignore all the fluff on this thread and fit an Xtreme if you want the ultimate efficiency or I would personally go for an Xclusive 36kW The only thing missing is the flue gas recovery but it comes with ten years warranty.

Oh and HW all current Intergas boilers are capable of running twin temp zones and will control the switching between them - the new ones even accept two Opentherm inputs

Two boilers is a terrible idea...............

Thanks Razor900. In your view, what would be the benefit of using the Xclusive 36kw over the Xtreme in our set-up please? We are keen to use an efficient boiler.

 

[hard-work]

This should be interesting.

 

[bobbidill]

Heating requirement less than 10kW as a design figure seems a bit sparse to me.

The house is terraced and is only 1300 or so sq ft fixitflav. I'm not sure if that impacts on these heating calculations.

 

[bobbidill]

That is equiv to 22mm. I assume you have decent flow and pressure. Flow is easy to gauge by filling a bucket and timing it. Pipe up as I described.

I'm going to tee off the water outlet we have, to measure the static and dynamic flow and pressure, which I'll post.