JHZR2
Staff member
Originally Posted By: rjundi
Do you have an efficient boiler in the mix? Use the boiler to heat a tank and you get nearly the same efficiency as the boiler itself. These hot water tanks are incredible as losses are something like 1/4-1/2 F degree loss/hour. You also do not run out of hot water.
I run a Buderus (German top notch) oil burner at 93% efficient which is significantly better than any tankless situation running at 75% efficiency. Hot water tanks gas or electric are worse typically for efficiency.
is 1/2 to 1/4 degree loss per hour good or bad? I assume youe implying an "indirect" fired hot water heater that uses a second connection to the furnace used for heating water, right?
I don't see how it is any more or less efficient than an equivalent HE hot water heater (Im assuming that your unit is a condensing, super HE unit, and that there is an equivalent HW heater device too). Unless your point about the 1/4-1/2 losses implies that it is a super-good insulation that is much better than other heaters...
This is really of high interest to me, as though we have radiator hot water heat and not forced air/central air, high efficiency operation of both (and making the best decision) is of really high interest.
Do you have an efficient boiler in the mix? Use the boiler to heat a tank and you get nearly the same efficiency as the boiler itself. These hot water tanks are incredible as losses are something like 1/4-1/2 F degree loss/hour. You also do not run out of hot water.
I run a Buderus (German top notch) oil burner at 93% efficient which is significantly better than any tankless situation running at 75% efficiency. Hot water tanks gas or electric are worse typically for efficiency.
is 1/2 to 1/4 degree loss per hour good or bad? I assume youe implying an "indirect" fired hot water heater that uses a second connection to the furnace used for heating water, right?
I don't see how it is any more or less efficient than an equivalent HE hot water heater (Im assuming that your unit is a condensing, super HE unit, and that there is an equivalent HW heater device too). Unless your point about the 1/4-1/2 losses implies that it is a super-good insulation that is much better than other heaters...
This is really of high interest to me, as though we have radiator hot water heat and not forced air/central air, high efficiency operation of both (and making the best decision) is of really high interest.