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Stuck in force air country

Steamhead Member Posts: 16,710
and if that makes the boiler too big, down-fire it. Check with the boiler rep to see how far you can downfire that boiler though.

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  • don_9
    don_9 Member Posts: 395
    But still

    have a passion for the wet stuff.Look at an old church today.
    The parish and cathedral has hot water convector.Also used
    for chill water, on the other side we have a three story office building heated off the same boiler.The office has
    rads with trv.the church wants to do away with the rads and add hydro-air why!!! I asked? It looks like one of you guys from up north did this one it is a work of art. Trv,circuit setter,temp and pressure guage,dont get to see this type of work often.any way my plan to go with ac only and leave the heat as is.By doing away with the rads are we not making the boiler to large for it intended use not to mention setting up the scenario for short cycling the boiler,higher fuel bills and decreasing its life.not to mention loosing
    control capability.You guys have any other reason why the church should not go to hydro air? Thanks don
  • Boilerpro
    Boilerpro Member Posts: 410
    Other reasons to stick with rads

    I specialize in churches and here are some of my reasons. 1)You can modulate the heat output using outdoor reset, and even better with indoor feedback, to help eliminate excessive hot air stratification at these very high ceilings. 2) Rads deliver a large fraction of thier heat in radiant form, an inherently more comfortable heat and more efficient, especially in tall spaces. Both of these amount to much better comfort and much less fuel usage. BTW. installing hydroair may make the boiler too small, because forced air systems almost always create higher heat loads due to stratification, ductwork leakage and ductwork radiant heat losses, and increase building air leakage. For big spaces like church Naves and meeting spaces, Ductless split sysetms are the way to go. No disturbing 100 year old plaster or trying to find some way to hide huge ductwork. You can also stage the ductless units (usually 2 or 3 are needed) by setting the thermostat settings slightly different allowing one small unit to keep the space cool during light loads and, since it is running almost all the time, providng very good dehumidification. Just my two cents, or maybe a dime.

  • don_9
    don_9 Member Posts: 395
    Thanks guys

    For the info,I hope I can convience them to make the right
    decision. don
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