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Discuss Unsure whether to install Atag or Vaillant in the Central Heating Forum area at UKPlumbersForums.co.uk.

  1. batman1

    batman1 New Member

    Hi Guys, first post here, looking for advice as to which boiler to go for.

    I have been recommended either the ATAG i40S or the vaillant 637 boiler. The installer is a recognised fitter for ATAG and highly recommends them as he said that the boiler is very well made and has a 10 year warranty with a lifetime warranty on the heat exchanger.

    Does anybody have experience in fitting the Atag's and how good is their after sales service? Are they good reliable boilers? The reviews on trust pilot are excellent.

    Cheers
     
  2. Harvest Fields

    Harvest Fields S. Mod Trusted Plumber GSR Top Contributor!!

    They are ok. But I prefer Vaillant if I am honest.
     
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  3. chris watkins

    chris watkins Plumber

    Have they done a heatloss calculation of the property ? they are both one of the largest output boilers on the domestic market which will not perform well if oversized.
     
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  4. Riley

    Riley S. Mod Trusted Plumber GSR Top Contributor!!

    Was gonna say they’re huge. Ps I’d. Go for Atag
     
  5. ShaunCorbs

    ShaunCorbs S. Mod Trusted Plumber GSR Top Contributor!!

    im guessing more than one shower / bathroom
     
  6. chris watkins

    chris watkins Plumber

    637 = system boiler
     
  7. ShaunCorbs

    ShaunCorbs S. Mod Trusted Plumber GSR Top Contributor!!

    yea so 300l unvented coil around 20kw makes the heating load around 15kw

    depends on the use wouldnt be my recommendation
     
  8. chris watkins

    chris watkins Plumber

    Come on Shaun we have had this one before - time the hot water so it heats the cylinder before the heating comes on = smaller cheaper to buy & run boiler.
     
  9. ShaunCorbs

    ShaunCorbs S. Mod Trusted Plumber GSR Top Contributor!!

    exactly stagger the times

    but there are and better efficiency when only the heating is on

    only time i would do a set up like that is when they require hot water all the time eg care small home / respite
     
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    • Agree Agree x 1
  10. Jerry

    Jerry GSR

    If they have the same warranty, go for the cheaper one.

    Unless it's Ferroli. Don't do Ferroli
     
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  11. Stu-B

    Stu-B Active Member

    Or Vokera.. yuk :eek:
     
  12. Harvest Fields

    Harvest Fields S. Mod Trusted Plumber GSR Top Contributor!!

    New ones actually seem
    Ok.
     
  13. king of pipes

    king of pipes Trusted Plumber GSR

    Good boilers but I have a job selling them as they are a top end product with a top end price they have a few niggles but the good out weighs the bad I have one fitted in my own home, had a faulty motorised on the hotwater pre heat and the one control is well let's say challenging, The Ideal Vougue is a nicely put together worth considering. Cheers kop
     
  14. Harvest Fields

    Harvest Fields S. Mod Trusted Plumber GSR Top Contributor!!

    Top end product but no history in the uk.
     
    • Agree Agree x 1
  15. EvilDrPorkChop

    EvilDrPorkChop GSR

    I'd go Vaillant too. Again size seems large, even when heating a large cylinder you'd be better with HW priority rather than oversizing the boiler.