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Buderus or Viessmann?

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OilHeating2026
OilHeating2026 Member Posts: 3
in Oil Heating

Hi all, first time poster and first time homeowner here. I am looking to replace my aging oil boiler in the northeast. I've narrowed my selection down to the Buderus G115WS or Viessmann Vitorond 100. My goal with my oil boiler is replacement is as much reliability and longevity as possible, is thirty years even possible out of an oil boiler anymore? And should I still be considering an EK System 2000? Thank you for any and all input!

Comments

  • pecmsg
    pecmsg Member Posts: 6,991

    And should I still be considering an EK System 2000? 

    Absolutely!

    RogerRobertw
  • Mad Dog_2
    Mad Dog_2 Member Posts: 8,491

    Nolo Contendere! I have installed both brands. Buderus is excellent. Viessman is The Gold Standard. Mad Dog

    Consulting by Mad Dog & Matt Jr.
    OilHeating2026
  • HVACNUT
    HVACNUT Member Posts: 7,362
    edited January 18

    Yes. Consider the EK.

    Between the Buderus or Viessmann, consider the contractor. Have you narrowed it down, and they offer both? Do you know what burner is offered with either? The Vitorond 100 was typically packaged with the Beckett NX burner, and the NX is now discontinued. Will the boiler be responsible for producing domestic hot water as well? Indirect? Will you be using Outdoor Reset? Buffer tank? What type of emitters?

    Properly maintained, you'll get 30 years out of any of the three. They're not mod cons after all.

    OilHeating2026
  • OilHeating2026
    OilHeating2026 Member Posts: 3

    Thank you for your input. My installer is recommending both the Buderus and the Viessmann and has experience installing both systems. He is leaning towards Viessmann though. He uses Riello burners for both systems and the system will be responsible for domestic hot water and will be used for hydronic baseboard heating in my home.

    I will be using an indirect water tank, he is recomending either an HTP Superstor 80 or a Turbomax 50. Every installer I have spoken to has swayed me against an outdoor reset for any system.

  • hot_rod
    hot_rod Member Posts: 27,198

    rumors on the oil heat site that. Buderus is discontinuing some versions?
    It’s hard to get a straight answer these days, but recent events seem to make you wonder about import boilers in general, cast iron specifically.

    It seems these decesions happen without much notice to the distribution and rep chain, i.e. SlantFin, TT, Basi.
    Oventrop and Adey have left the US market also. Tariff headaches??

    Data suggest heat pumps have surpassed boiler sales in France, Germany and Italy

    Trade shows indicate all the big boiler manufacturers continue to promote HP offerings.

    IMG_1852.jpeg
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
    OilHeating2026
  • OilHeating2026
    OilHeating2026 Member Posts: 3

    I don't disagree at all, I'm just not interested in fully converting to heat pumps at this time. I will definitely be considering a hybrid set up in the future when I replace my ducted two zone central air system later.

  • hot_rod
    hot_rod Member Posts: 27,198
    https://forum.heatinghelp.com/discussion/comment/1882818#Comment_1882818

    I was thinking more about staying with a boiler brand that you can get parts and support for down the road, not necessarily a HP.

    Searching around HH you see what brand(s) gets support, and is very willing to help their customers.

    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
    szwedj
  • EBEBRATT-Ed
    EBEBRATT-Ed Member Posts: 20,013

    EK does provide good support.

    The parts availability is an issue for me. You by something you hope you can get parts in 10 years. And I am not talking just heating equipment.

    I fixed a 25-year-old refrigerator parts availability was no problem.

    Same with an electric clothes dryer over 20 years old

    But parts for my 15 year old Delta miter saw are not available.

    its all over the place and there is no way of knowing.

  • psb75
    psb75 Member Posts: 1,113

    Home office in NH used to be "Bosch/Buderus." Now…it is just "Bosch". I believe that "says… something." Buderus was reputed to cast the best iron boiler metal in the world.

  • Roger
    Roger Member Posts: 468

    Thank you for everyone's posts and supportive comments, and for your interest in finding the best solution for your home for the next several decades, @OilHeating2026 .

    Energy Kinetics is entering its 47th year and we call our heating systems 30-year boilers because we know that's an easy target to hit with our proven spiral boiler designs made from our specially formulated steel.

    Energy savings will really add up over a 30 year life cycle, and even our non-condensing heat and hot boilers with thermal purge perform with efficiency very close to our condensing boilers. In this Department of Energy Lab study , they outperformed 95 AFUE modcons. I'm sure you'll be very pleased with any model with quietness, savings, near endless hot water, and long term serviceability. Our systems use nearly all industry standard parts , and we keep a deep inventory of the few parts that are specific to Energy Kinetics - these are available to all heating professionals. In a pinch, our boilers can run without them, so there's no reason to go without heat.

    @hot_rod , I always take the European heat pump industry sales comparisons with a grain of salt as it often takes multiple heat pumps to heat a house. To be at parity, that means heat pumps need to have annual sales figures substantially higher than boilers. When compared to conventional boilers in the US that have lifecycle 2x to 3x as long has heat pumps, that means many more heat pump replacement cycles in that 30 year window of operation as well. @OilHeating2026 , you're right on the money when looking at your AC replacement as the time to consider heat pumps and hybrid operation.

    Please feel free to PM me with your location and I can connect your with your territory manager to answer other specific questions you may have, and to facilitate a solution with one of the many top heating contractors that are factory trained in our dealer network.

    Best,

    Roger

    President
    Energy Kinetics, Inc.
    Robertw
  • Gabriel82
    Gabriel82 Member Posts: 39

    Viessman can be found here in Romania 30 years old and still working with no problems...

    Oil or natural gas!

    Only downside are expensive spare parts...

    (one tube (oil boiler)for returning flame on 1st gas pass costs about 700 Euros. And it can't function without it...

    Don't ask about the heat exchanger 😱

    I would expect the same from Buderus! (quality wise. don't know about parts ).

    Although if I were living in USA or Canada a Navien or NTI would be on my "maybe list" 😁

    NTI Caprice 85 or Navien LCB 700 🙄

    It's either condensing boiler or nothing 😎

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