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Almost time to replace 2 Bradford White Combis

HeyJude
HeyJude Member Posts: 1
in Radiant Heating
These 2 units are reaching age 22 and I need replacement suggestions. There are 2 units because there are 2 radiant zones in this 30 x 60 single story house, concrete slab on grade. Each one, as you know, also serves a portion of the domestic hot water. (#1: Kitchen and master bath with large tub. #2 is for the Laundry and bathroom, plus half bath.) These units are located at opposite ends of the house. Any ideas?

Comments

  • hot_rod
    hot_rod Member Posts: 23,515
    I’ve been told the combos are still available, possibly a special order.
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
  • Ironman
    Ironman Member Posts: 7,569
    They are Legionella breeding machines and that type of setup has been outlawed in many places.

    There are some good "combis" on the market now that separate the hydronic from the domestic. Lochinvar Noble appears to be a good one. HTP UFTC is another.
    Bob Boan
    You can choose to do what you want, but you cannot choose the consequences.
  • hot_rod
    hot_rod Member Posts: 23,515
    Look like a CombiCor tank with a double wall coil inside for radiant Really should not be a legionella issue
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
  • Ironman
    Ironman Member Posts: 7,569
    edited July 2020
    Looks like standard top connected tanks to me. The lines are Tee'd above the heaters going to the radiant.

    Also has iron pumps which shouldn't be used on an open system.
    Bob Boan
    You can choose to do what you want, but you cannot choose the consequences.
  • hot_rod
    hot_rod Member Posts: 23,515
    Ironman said:

    Looks like standard top connected tanks to me. The lines are Tee'd above the heaters going to the radiant.

    Also has iron pumps which shouldn't be used on an open system.

    \
    Looks like 4 connections on the top? T&P in the side.
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
    kcopp
  • Matt_67
    Matt_67 Member Posts: 300
    The early CombiCors had the space heating out the top as well. I see four pipes off the top of that if I'm seeing it correctly.
  • Ironman
    Ironman Member Posts: 7,569
    hot_rod said:

    Ironman said:

    Looks like standard top connected tanks to me. The lines are Tee'd above the heaters going to the radiant.

    Also has iron pumps which shouldn't be used on an open system.

    \
    Looks like 4 connections on the top? T&P in the side.
    You're right. I guess that's what happens when an old man doesn't use his glasses?
    Bob Boan
    You can choose to do what you want, but you cannot choose the consequences.

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