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combination system

I recently moved into a large 10 year old home that has hydroair throughout and radiant floor heat on the main floor. My question is for the rooms with both heat sources, how should I set the thermostats? Hydro-air slightly higher than radiant? Other way around?


  • NRT_Rob
    NRT_Rob Member Posts: 1,013
    radiant higher

    if you set the hydroair higher, your floors will never heat.

    if you set the radiant higher, the hydroair only comes on when the radiant can't keep up.
    Rob Brown
    Designer for Rockport Mechanical
    in beautiful Rockport Maine.
  • EJ hoffman
    EJ hoffman Member Posts: 126
    Shoulder months

    During shoulder months ie September, October May or depending where you are geographically you may only need the hydro air during those months to take the chill off in the morning and not load up on a bunch of radiant energy until the days reach below your comfort levels and then load up the radiant first and let the hydro work as Rob stated
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