Understanding tankless recirculating water heaters - Page 3 If you know how long it takes for hot water to begin to arrive at the remote location and you turn on a hot water tap or shower before the tankless heater turns off due to reaching its set point in the recirculation line, there will be no cold water sandwich created If you wait too long the recirc line gets hot and the heater will turn off
tankless vs. tank hot water heater in place with hard water We live in Cambridge, MA which is known for its very hard water Our water heater is basically caput I'd like to upgrade to tankless given the energy savings (the state gives a $750 rebate vs $100 for regular water heater), but am not clear on the cost-benefit here
Rinnai Tankless Heater Short Cycling — Heating Help: The Wall We have a hydronic heating system with a pump to circulate hot water through the tank continuously to feed a heat exchanger for the radiant heating loop When the hydronic pump runs the Rinnai heater correctly turns on and heats the loop up to temperature (140F) After a few minutes (3-5 min) the heater will start 'short cycling' continuously
Tankless water heater with storage tank - Heating Help Looking for a piping diagram for a tankless water heater with storage tank Most diagrams show street water being fed into the tank as well, which I think is counterproductive Any insight would be greatly appreciated
Noisy Tankless Hot Water Heater — Heating Help: The Wall I have a gas recirculating Rinnai Tankless Hot Water Heater, model# RSC199IN Upon normal start-up, the fan and heating unit produce a loud low frequency drone sound and vibration from the unit Since the unit is mounted in the garage on the other side of the kitchen wall, the loud sound and vibration carry into the kitchen and living area
Why is an indirect advantageous? — Heating Help: The Wall Tankless hot water heaters and tankless coils have no reservoir Both of those are flow limited -- that is, over the design flow they cannot provide hot water, whereas an indirect or direct fired water heater are volume limited