Currently running my hot water supply from an oil fired tankless hot
water furnace without a mixing valve. This makes for very hot water
from the faucets. The simple mixing valves that I have used in the
past always seem to fail rapidly. Can anyone recommend a good brand
name hotwater temperature regulating mixing valve? Are there ones that
allow you to set the outgoing hot water temperature or at least limit
it to a maximum temperature?
I have a oil-fired boiler as well, and I get my domestic hot water from it
The only thing I can comment on re: the failing of tempering valves is
that my manual was *very* clear that the valve must be installed below the
heater coil itself, or it will accumulate mineral deposits.
Have you considered running the furnace at a lower temperature?
This will make the pumps which force hot water into the radiators
run longer, but may give more even heat and doing so will result in
"hot water" at a lower temperature.
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