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I think I'm in love

Steve Minnich
Steve Minnich Member Posts: 2,679
I was able to put my hands and eyes on a Viessmann CU3A today. Wow! Easy to service, 13.5 gallons of water in the smallest model, and what looks like a bullet-proof HX and burner. It's in my shop now and will be installing my first one before long. I'd love to hear what others think of it.

Steve Minnich
Minnich Hydronic Consulting & Design, LLC
[email protected]

Comments

  • Robert O'Brien
    Robert O'Brien Member Posts: 3,388
    Have only installed one, very nice! Takes up some space though
    To learn more about this professional, click here to visit their ad in Find A Contractor.
    Steve Minnich
  • Steve Minnich
    Steve Minnich Member Posts: 2,679
    edited April 2018
    Yeah its a big one but still takes up less room than a boiler AND a buffer tank : )
    Steve Minnich
    Minnich Hydronic Consulting & Design, LLC
    [email protected]
  • Danny Scully
    Danny Scully Member Posts: 1,329
    Tank...enough said :wink:
    Steve Minnich
  • SuperJ
    SuperJ Member Posts: 605
    Variable primary is so simple and elegant.
    High mass, high efficiency makes so much sense. I've got the poor mans version with a Polaris and hacked controls. I live 5 minutes from the Viessmann factory in Waterloo, only got to inside once though.
    Steve Minnich
  • Solid_Fuel_Man
    Solid_Fuel_Man Member Posts: 2,307
    Pretty sure the HX has been used in Europe for many years, just made it over here 3 years ago AFAIK.
    Serving Northern Maine HVAC & Controls. I burn wood, it smells good!
    Steve Minnich
  • hot_rod
    hot_rod Member Posts: 15,048
    13 gallons is nice. It takes a large cast boiler to get that type of water content these days, most are under 5 gallon capacity

    maybe fixed output cast boilers are the application need for buffer tanks
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
    Steve Minnich
  • We just placed our first CU3A in the boiler room yesterday and attended the Viessmann classes in Warwick, RI last month to go over installation and servicing.
    I love it that we are returning to high volume boilers, this time with condensing technology.
    Often wrong, never in doubt.
    Steve Minnich
  • Steve Minnich
    Steve Minnich Member Posts: 2,679
    I have not taken the classes yet but I will. Meanwhile, I'll read every manual as if it were a textbook with highlighter in hand.
    Steve Minnich
    Minnich Hydronic Consulting & Design, LLC
    [email protected]