Add a tank and pump to tankless coil?

Discussion in 'Tankless Water Heater Forum' started by aaqq, Feb 25, 2010.

  1. aaqq

    aaqq New Member

    Messages:
    1
    Location:
    katonah, ny
    Is it feasible to add a storage tank and pump to an existing tankless coil that can't produce hot water fast enough? I am trying to get the most mileage out of my old boiler before I replace everything.
  2. Dana

    Dana In the trades

    Messages:
    2,777
    Location:
    01609
    Rather than adding a crummy tank to the coil, buy a real indirect-fired tank with it's own internal heat exchanger and run it as a separate zone. The indirect will typically last as long or longer than a new boiler, and with bigger heat exchanger can use the full output of the boiler for "endless hot water". When it comes time to buy a new boiler moving the indirect over to the new boiler will be no more complicated than any other heating zone. Also, if your old boiler is cold-start tolerant (almost all gas fired boilers are, some oil-fired boilers aren't), with an indirect you don't have to keep the boiler hot all summer just for hot water with an indirect, doubling it's water-heating efficiency.
Similar Threads: tank pump
Forum Title Date
Tankless Water Heater Forum Cost/Payback of Tankless Gas vs. Heat Pump Electric Feb 19, 2014
Tankless Water Heater Forum further improving/automating recirc pump control with Noritz tankless Dec 18, 2012
Tankless Water Heater Forum need to descale my tankless heater can you use a sump pump Oct 26, 2012
Tankless Water Heater Forum Tankless water heater, recirculation pump? Mar 25, 2012
Tankless Water Heater Forum Should I replace recirc pump for my tankless heater? Mar 25, 2012

Share This Page