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Which high flow combi setup?

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Discuss Which high flow combi setup? in the Plumbing Jobs | The Job-board area at PlumbersForums.net

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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
 
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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
 
the viesmann 111 is getting good reviews but the 222f is very large do you have the room for one
 
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.
 
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.
 
Another vote for Viessmann 222
 
Worcester 550 is a brilliant boiler and can easily cope with two bathrooms.
 
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:

7EDyAx8AeULYvNEiiKmzts3f-GJ_dsy9MmdKqKAPOUuWdN7YWvX4qDrXIza9uLSDbzmw2tIhTyEUG-yEA8i-ly5KtbVDkzDz6Ktbiy9J18x-N2ttYg6vtPSWkRAxX-9EjPMtZz6yrq6F1478b_-A8af5fDCYIM4ES9r7BkB0TRj9byuJVS0x5-B8dEXEqkCeEyfqrfuDIN62peWfBB5D2Fdv4fXyMiNk1s6VRcDWqmqleiO5mioQWXzaQDwowgjpFtxCiP_elDd_YJw4lFm8zfhZj3EX8yJzSHlx5aeWaTLde0M-_ekfa4xPs0pjgHJNFcD3UZxDm_bQiWED2SWNOTY6s5KiKsMlL2pCfBgf-1VlKu9pn1lOfyP4a2MjfS3DyGxP86_QYwSZzj6eghck0gviTTvU3qphBMhvzba-uvdsYnbYtMxmzzipV9WPwIS0o9U90fFZIqsRASLQra7_RpF0xSOKciA_caIG6y_otXIIpzOsP-f0iMkD0uw3n-zEoHgEZDxCHUeE9jVzOvIVQnCc1PuViHEX_isvaUK9rYHjapqEvBeJrFlZKp8N2YOCiqe2QEl1CGz-aiFyL1ANg5B0VkqjH-rz=w1468-h1956-no



15_Rinnai_Infinity_K26i_FO_with_ErP_label.jpg

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

Rinnai :: Tankless K26i - 48kW Domestic Multipoint Water Heater
 
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Armaflex outdoor insulation ?
 
PriestyUK said:
Yeah man and trace heated, what do A/C guys use?
Click to expand...

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 ?
 
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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:
 
PriestyUK said:
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:
Click to expand...

And trying to go round clips is a pita and miter joints :D
 
Howsie said:
Lots of the houses I fit boilers in would be classified as commercial. 38kw isn't IMHO.
Click to expand...

no but if mis say commercial you need to be commercial
 
ShaunCorbs said:
no but if mis say commercial you need to be commercial
Click to expand...

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.
 
Howsie said:
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.
Click to expand...

sorry to say commercial as well, same fit a few but never fitted a commercial combi always rinnai if needs mains hot water
 
I'm surprised as I have a A320 in my house and I don't remember that being listed as commercial!
 
Howsie said:
I'm surprised as I have a A320 in my house and I don't remember that being listed as commercial!
Click to expand...

Give me five will double check but only listed on commercial site
 
Howsie said:
Ah. That's because they've changed there setup. Company reorg I believe.
Click to expand...

a325 commercial just heard back from a mate (rep) but who says you cant install it in your own home :D
 
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