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Ideal Delta T

Jimbo_5 Member Posts: 214
I have a TT Solo 110 heating 9 ci radiators on 2 floors, converted gravity system, with outdoor reset. Right now I have a delta t of about 30 running the circulator at its lowest setting. Is this good or should it be a smaller delta?


  • Gordy
    Gordy Member Posts: 9,514
    Comfortable ?

    If so that delta will work so long as the rooms are heating well.

    Is the boiler piped direct, or primary secondary? If primary secondary is that the boiler loop delta?
  • Jimbo_5
    Jimbo_5 Member Posts: 214
    Heats well with delta-t at 30

    Piped direct, no primary/secondary. Heated ok with delta-t at 18 to 20 also when circulator on higher flow rate. I just thought the higher delta would create more condensating which would be better for the boiler.
  • Harvey Ramer
    Harvey Ramer Member Posts: 2,217

    delta T is good so long as you stay comfortable. Just make sure you adhere to the minimum flow rate on the TT Boiler. You may have to play with the water temp versus the delta T to achieve this.