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  1. Replies
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    Sure VFD or at least bypass pressure...

    Sure VFD or at least bypass pressure differential. VFD will decrease flow trough system and boiler without separation when load will drop. Differential pressure by pass will keep same max flow trough...
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    Are you even reading my posts?

    Are you even reading my posts?
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    Maybe now is the time to read this book?

    Maybe now is the time to read this book?
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    So, if you using TRVs, do you use p/s or you...

    So, if you using TRVs, do you use p/s or you still using direct pumping ? Also buderus , Weil McLain and slant fin are great brand names and I feel good you some how place me in that group in...
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    Find qualified installer with good track record...

    Find qualified installer with good track record and references, and he will guide you trough whole process. Just place price issue at #5 in your priorities list in this project.
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    Quote Originally Posted by BadgerBoilerMN ...

    Quote Originally Posted by BadgerBoilerMN
    QUOTE: Viessmann does not mandate P/S and one of the reasons they are one of our favorites on steam and gravity conversions. They do like to sell hydrolic...
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    Usually $20k+ only boiler with indirect. Steam to...

    Usually $20k+ only boiler with indirect. Steam to hot water with mod con boiler and indirect for 20K is below the cost in my opinion.
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    where in my post "these are clear guidelines...

    where in my post

    "these are clear guidelines for LLH
    also make a note that in viessmann opinion primary secondary arrangement does promote condensing in condensing boilers, quite different from...
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    It costs much more than $20.000 to do steam to...

    It costs much more than $20.000 to do steam to hot water conversion properly
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    This is not true. load is determined by space...

    This is not true. load is determined by space heat loss, not temperature of radiator. Also, delivering higher temperature water to radiator or manifold, allows to cut on flow, because heat load is...
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    these are clear guidelines for LLH also make a...

    these are clear guidelines for LLH
    also make a note that in viessmann opinion primary secondary arrangement does promote condensing in condensing boilers, quite different from your statement.
    21415
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    Well insulated steam pipes losing as little heat...

    Well insulated steam pipes losing as little heat as well insulated hot water piping. It does not matter what diameter piping there, it matters how well piping insulation done in unconditioned spaces....
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    Maybe you need this book signed by Dan Hologan ...

    Maybe you need this book signed by Dan Hologan


    21365

    I attached photo of afterword page.

    Interesting reading, isn't it?
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    Why you discriminating against elderly people and...

    Why you discriminating against elderly people and cats? They can be burnt by hot radiator too. And what about a cup of tea? What if children are around cup of tea of 200F. They can get burnt too....
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    Btu is btu. What gets lost trough envelope of...

    Btu is btu. What gets lost trough envelope of building gets replenished by radiator output. When balance loss/gain is reached temperature in the room gets stable. Your reference to lower radiator...
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    In injection loops for radiant heat you might...

    In injection loops for radiant heat you might find 70F delta t with delivery temperature of water 180F. It is done to reduce GPM , pumping costs and installation costs. In hydronic applications the...
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    You do a lot of forced hot water systems and do...

    You do a lot of forced hot water systems and do not utilize primary secondary piping? That is strange. How you decouple boiler from the heating system?
    In my steam systems people set the...
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    Why would you add cold water constantly to steam...

    Why would you add cold water constantly to steam system?

    High pressure, low pressure boilers, What it has to do with efficiency? What you do is burn fuel, generate heat and transfer it to where it...
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    Steam

    I had a chance to install steam boiler with modifications of steam heating system and condensing boiler on 2 identical brownstones within couple blocks from each other. The gas bills were within 20...
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    Steam system done 100 years ago is much better...

    Steam system done 100 years ago is much better quality than anything you will get today. people knew how to do quality job 100 years ago. as per efficiency, install properly sized steam gas boiler,...
  21. good , right quality properly sized and legally...

    good , right quality properly sized and legally done high efficiency boiler will start in 25++K range.
  22. The quoted price explains ignorance of people...

    The quoted price explains ignorance of people giving quote. You will see a good installer when he will quote you at least double of that.
  23. Thread: Boiler help

    by gennady
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    5,284

    you do not need thermostat with properly set up...

    you do not need thermostat with properly set up outdoor reset mod con. Anybody advising installation of thermostat or zoning with mod con installation does not understand principles of outdoor reset...
  24. Thread: Boiler help

    by gennady
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    I do not use rules of thumb, i do not use btu per...

    I do not use rules of thumb, i do not use btu per square ft. I use manual J. Also i install mostly mod cons, and i do worry more about low firing rate than high. Mod cons properly set up can follow...
  25. Thread: Boiler help

    by gennady
    Replies
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    5,284

    Just as an example, I did install 120,000 Btu...

    Just as an example, I did install 120,000 Btu boiler in 6 apartment building, 220,000 btu in 18 apartment building, and there were no complains when weather hit 6F. This oversizing Buisiness is just...
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