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do combi boilers typically have outdoor reset controls

weil_fail Member Posts: 78
edited August 2019 in Gas Heating
so, I had been looking into condensing boilers with an indirect tank, but I might be able to use a large combi boiler (liked the Noritz EZ98 at 9.8gpm or EZ111 at 11.1gpm). however, it's hard to tell from their site whether they do modulating operation with an outdoor reset control to lower the boiler water temp during moderate seasons (improves efficiency).

is that feature common for combi boilers, and I'm just not doing well googling it?

if it's not a common feature, do you know which brands support outdoor reset controls?


  • hot_rod
    hot_rod Member Posts: 18,177
    Are the EZ models combis or just tankless water heaters?

    Most every combiner's boilerplates I know has some sort of ODR function.
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
  • weil_fail
    weil_fail Member Posts: 78
    ohh, good point. they may just be water heating. I found them when searching for combi boilers, but may have gone off track