Which high flow combi setup?

[Paul Hemel]

For reasons I won't bore you with I cannot have an unvented system so am looking at having a storage combi installed. My mains has been upgraded to 32mm and when the new boiler is installed the current 15mm running into my house from the mains will be upgraded to 22mm.

My house is a normal sized 3 bed 1 bathroom with a shower but also has another separate showeroom. There's 2 adults and two kids that are growing up fast so our demand for hot water is rising and there will be times when more than 1 outlet will be demanding hot water. I know combis are far from perfect but would like to ask what you would advise. So far I think the best options are a WB 550cdi, a Viessmans 111W or 222F and the Alpha flowsmart set up. When I've searched this site a lot of the posts seem to be from a few years ago so am really after an up to date response on what experience you guys, the professionals, have with these systems and brands. Are there any others that you would recommend?

i really appreciate your help and advice. Thanks in advance

 

[mutley racers]

I have heard people say good things about the 550 highflow. 25 litres a minute is great for what you need if your flow and pressures are good.

Not looked at the veismann spec but will now

 

[Gasmk1]

the viesmann 111 is getting good reviews but the 222f is very large do you have the room for one

 

[IND_Nick]

We fit 550's whenever space means unvented isn't an option and they perform well. Usual Worcester support is good and, touch wood, never had an issue with them. Just be aware they are really heavy once filled so make sure area you want to install is prepared properly.

 

[Soulman]

The 222f although big is a nice bit of kit, and has the option of a secondary return. Tech say it can run 2 showers at once with no issues, and in practice this is true. Just make sure your showers run off the combination cold supply to ensure balanced pressures at the showers.

 

[ShaunCorbs]

Another vote for Viessmann 222

 

[Howsie]

ATAG Q38 34 litres a minute.

 

[mutley racers]

ATAG Q38 34 litres a minute.

Can you send me a link to this as the one I am looking at is q38c and has 16 litres a minute flow rate

 

[mfgs]

Worcester 550 is a brilliant boiler and can easily cope with two bathrooms.

 

[Roger Welton]

222 if space allows.

 

[Alpha man]

Another one for Atag.

 

[Howsie]

Can you send me a link to this as the one I am looking at is q38c and has 16 litres a minute flow rate

http://www.plumbcenter.co.uk/wcssto...td.lang.all/ic/al/Atag_Q Series_Technical.pdf

 

[ShaunCorbs]

http://www.plumbcenter.co.uk/wcssto...td.lang.all/ic/al/Atag_Q Series_Technical.pdf

Classed as a commercial combi I think

 

[Howsie]

Classed as a commercial combi I think

38kw

 

[ShaunCorbs]

38kw

there domestic range starts with ic, and also listed on there commercial site

http://www.atagcommercial.co.uk/products/combi-boilers/q-series/q38c

 

[PriestyUK]

Rinnai do some good boilers for hot water. We install their commercial external boilers for Mcdonald's but they have a domestic range which could be worth a look. Worth investing in a good water softener if you planning at using that many L/min

One of the external ones ive installed:

Rinnai :: Tankless 17e - 37kW Domestic Multipoint Water Heater

Rinnai :: Tankless K26i - 48kW Domestic Multipoint Water Heater

 

[ShaunCorbs]

Armaflex outdoor insulation ?

 

[PriestyUK]

Yeah man and trace heated, what do A/C guys use?

 

[ShaunCorbs]

Yeah man and trace heated, what do A/C guys use?

Same can't beat armaflex used the cheap stuff that uses rubber and stnd fibreglass pipe ins horrible and takes ages to fit

Did you wire it up ?

 

[PriestyUK]

I hate lagging pipes, I always say to the governor im rubbish at it and I aint no lagger plus it gets me in a mood as it covers up all your nice work :32:

 

[ShaunCorbs]

I hate lagging pipes, I always say to the governor im rubbish at it and I aint no lagger plus it gets me in a mood as it covers up all your nice work :32:

And trying to go round clips is a pita and miter joints

 

[Howsie]

there domestic range starts with ic, and also listed on there commercial site

http://www.atagcommercial.co.uk/products/combi-boilers/q-series/q38c

Lots of the houses I fit boilers in would be classified as commercial. 38kw isn't IMHO.

 

[Howsie]

Rinnai do some good boilers for hot water. We install their commercial external boilers for Mcdonald's but they have a domestic range which could be worth a look. Worth investing in a good water softener if you planning at using that many L/min

One of the external ones ive installed:

Rinnai :: Tankless 17e - 37kW Domestic Multipoint Water Heater

Rinnai :: Tankless K26i - 48kW Domestic Multipoint Water Heater

Great boilers!

 

[ShaunCorbs]

Lots of the houses I fit boilers in would be classified as commercial. 38kw isn't IMHO.

no but if mis say commercial you need to be commercial

 

[Howsie]

no but if mis say commercial you need to be commercial

You're right. Fallen foul of this a couple of times but it doesn't matter(to us) as we do both. I should have said the A325C which does something like 32lpm. I could (also) be wrong on this as well.