Welcome! Here are the website rules, as well as some tips for using this forum.
Need to contact us? Visit https://heatinghelp.com/contact-us/.
Click here to Find a Contractor in your area.
If our community has helped you, please consider making a contribution to support this website. Thanks!

Vitola

Options
Robert O'Brien
Robert O'Brien Member Posts: 3,584
in THE MAIN WALL
you want the absolutely finest in material,design and technology currently available

<A HREF="http://www.heatinghelp.com/getListed.cfm?id=313&Step=30">To Learn More About This Professional, Click Here to Visit Their Ad in "Find A Professional"</A>

Comments

  • rumn8r
    rumn8r Member Posts: 105
    Vitola

    Is the Viessmann Vitola a suitable boiler for a hydronic forced air system? I know it is modulating and non-condensing. While the low water temperatures and long run times will increase overall efficiency, I am concerned that with a forced-air system, it will feel drafty. Can you alter the minimum temperature so that the air feels warm in the shoulder seasons?

    I have a 12" x 12" clay lined chimney; will it have to be lined?

  • Constantin
    Constantin Member Posts: 3,796
    Modulating?

    That would be new to me. Is the modulation a feature available with the gas burner?

    The Vitola is not supposed to condense, though if you run your BOP cool enough, then the flue gases may be tempted to condense in the flue/chimney. I'm very happy with my Vitola and I would recommend getting a proper flue liner, no matter what kind of boiler you end up with.

    Plus, unless you home is enormous, a 12x12" flue should provide plenty of space for a liner to go down, along with some Vermiculate to insulate it. The actual flue liner diameter requirement will depend on the size of the boiler you have to install to meet your heat loss. Have you calculated the heat loss yet?
  • rumn8r
    rumn8r Member Posts: 105
    Maybe I'm confused.

    This is from the Viessmann web site:

    "Hot water heating boiler with cast iron/steel biferral heat exchanger surface for modulating boiler water temperatures without low limit."

    Isn't this the same as a modulating boiler?
  • Bill Nye_2
    Bill Nye_2 Member Posts: 538


    > This is from the Viessmann web site:

    >

    > "Hot

    > water heating boiler with cast iron/steel

    > biferral heat exchanger surface for modulating

    > boiler water temperatures without low

    > limit."

    >

    > Isn't this the same as a modulating

    > boiler?



  • S Ebels
    S Ebels Member Posts: 2,322
    Nope

    The water temp modulates. The burner however, has a fixed firing rate.
  • Constantin
    Constantin Member Posts: 3,796
    There is a difference...

    ... a modulating burner/boiler can change the input of the heat going into the appliance. That is why modulating gas boilers will have a rating that consists of a range like 80,000-200,000BTU/hr input. Those boilers can then fire at any point in that range.

    The Vitola can handle a much wider range of boiler and return water temperatures than much of its CI competition. However, that does not make it a modulating boiler (even if the Vitotronic 200 or 300 controller can control modulating burners already) Modulating oil burners at the residential scale are already available in other parts of the world, perhaps one day they'll be released in the US also.
  • Bill Nye_2
    Bill Nye_2 Member Posts: 538
    No

    No, modulating the water temperature is not a modulating boiler.

    On a modualting boiler the flame or firing rate is reduced or increased to meet demand. The Vitola has a fixed firing rate, on or off, no modulate.

    You could certainly use it for hydro-air systems. I have one at home. I have used it for hydro-air with good results and great comfort. Now I have radiant floor and radiant baseboard with the same Vitola but with much, much , more comfort.
  • Mark Hunt
    Mark Hunt Member Posts: 4,908
    No


    They are talking about modulating system water temps, not the boiler firing rate. The boiler still fires at the same rate regardless of OD or ID temp.

    A modulating boiler modulates it's fuel input. The Vitola does not.

    Mark H

    To Learn More About This Professional, Click Here to Visit Their Ad in "Find A Professional"
  • Bill Nye_2
    Bill Nye_2 Member Posts: 538
    No

    No, modulating the water temperature is not a modulating boiler.

    On a modualting boiler the flame or firing rate is reduced or increased to meet demand. The Vitola has a fixed firing rate, on or off, no modulate.

    You could certainly use it for hydro-air systems. I have one at home. I have used it for hydro-air with good results and great comfort. Now I have radiant floor and radiant baseboard with the same Vitola but with much, much , more comfort.

    You modulate the water temperature with outdoor and/or indoor sensors and a Viessmann control. Mine is a trimatic MC , it is 5 or 6 generations old now. The new one is a vitotec something
  • S Ebels
    S Ebels Member Posts: 2,322
    Rumn8r

    Do you get the impression that we're all in agreement on how the vitola operates?
  • rumn8r
    rumn8r Member Posts: 105


    Then I assume that I can set the minimum temp on a Vitola so the forced air doesn't feel too cool. Is this a good boiler to provide hot water for:

    2 variable speed air handlers (1250 and 2000 cfm)
    1 constant speed pool dehumidification unit (1400 cfm)
    1 indirect water heater
    1 pool heat exchanger

    Should I go with 2 smaller boilers for redundancy and "modulation"?
  • rumn8r
    rumn8r Member Posts: 105
    deleted double post

  • rumn8r
    rumn8r Member Posts: 105
    In agreement

    You all seem to be in agreement that the Vitola is not modulating; thanks for setting me straight. Now, is the Vitola the best boiler for my new system?

    2 variable speed air handlers (1250 and 2000 cfm)
    1 constant speed pool dehumidification unit (1400 cfm)
    1 indirect water heater
    1 pool heat exchanger

    Total heat loss ~ 250 k btu/h

  • Al Letellier_9
    Al Letellier_9 Member Posts: 929
    vitola

    The vitola is an excellent piece of equipment, amongst the world's best. It excels with low temp system water. But remember, as with any other boiler, the boiler is only the pot that heats the water. How you control the system makes all the difference in the world. If you have no or little experience with control setups, find a pro who does or get some schooling. Any system can be made to operate within design perameter if properly installed and controlled. Viessmann's controls are amoungst the most flexible. Contact your local Viessmann rep. I'm sure he'll be more than willing and able to help you out. That's what he gets paid for.

    To Learn More About This Professional, Click Here to Visit Their Ad in "Find A Professional"
  • Paul Pollets
    Paul Pollets Member Posts: 3,671
    Vitola for AHU coils

    The Vitola is an excellent boiler selection for running AHU coils, pool/spa Heat Exchangers, and any other med-high temp load. I've one Vitola installation running 5 different water temps in the same home.

    To Learn More About This Professional, Click Here to Visit Their Ad in "Find A Professional"
  • rumn8r
    rumn8r Member Posts: 105
    How is it compared to the Vitogas 100

    Paul,

    Yesterday I was told that the Vitogas 100 would be a better fit because it is less expensive, slightly more bulletproof/reliable, and I don't need the low temp limit. Thoughts?
  • Paul Pollets
    Paul Pollets Member Posts: 3,671
    the diff

    I've used the Vitogas 100 in applications where the higher cost of the Vitola was an issue. It is less expensive, but performs at a slightly lower efficiency. I'd give it an 8.5 if the Vitola with chassis burner is a 10. (or the Vitodens, if yours was a low water temp application.)

    To Learn More About This Professional, Click Here to Visit Their Ad in "Find A Professional"
This discussion has been closed.

Categories