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DMan- I'm not sure but as a temporary fix you could possibly increase the water temp (170-180F??) that the tankless coil is outputting so that when you shower it is actually using less flow of hot water and would therefore be able to last an entire shower. Of course that means that you'll be burning more oil just maintaining that higher temp water.
On a similar note, we also have an oil burner with a tankless coil. So far the hot water supply has been sufficient, but I have been wondering if a quality indirect water heater would be more efficient to justify a $1500 install. thoughts?
It would def. be more efficient to install. When you use a storage tank its only maintaining 110-115 deg. water. The u-value on these tanks are very high there for do not need alot of heating to maintain temp.
DMan- I'm not sure but as a temporary fix you could possibly increase the water temp (170-180F??) that the tankless coil is outputting so that when you shower it is actually using less flow of hot water and would therefore be able to last an entire shower. Of course that means that you'll be burning more oil just maintaining that higher temp water.
On a similar note, we also have an oil burner with a tankless coil. So far the hot water supply has been sufficient, but I have been wondering if a quality indirect water heater would be more efficient to justify a $1500 install. thoughts?
Good question....really depends on how many people live in the structure. The problem is that 180 degree water will burm infants, toddlers and elderly skin in seconds. Several toddler deaths have occured to scalding hot water.
2 adults could use a coil set at a high temp and be fine and fairly cheap to operate. A family of four will need a storage tank and is worth the money for energy savings.
It would def. be more efficient to install. When you use a storage tank its only maintaining 110-115 deg. water. The u-value on these tanks are very high there for do not need alot of heating to maintain temp.
True , heat loss on these units are about .25-.50 degress per hour....amazing.
How does the efficiency of hot water storage systems like these compare to traditional hot water heaters or coil systems in terms of oil consumption?
Heat and standby heat loss thru convention on a traditional hot water is tremendous.....basically 50% of the fuel spent heating your water is wasted. Worse, it draws heated indor air and sends it out the chimney flue.
Storgage tanks give you "free hot water" during the heating system as it is slaved to the heating system.
Good question....really depends on how many people live in the structure. The problem is that 180 degree water will burm infants, toddlers and elderly skin in seconds. Several toddler deaths have occured to scalding hot water.
2 adults could use a coil set at a high temp and be fine and fairly cheap to operate. A family of four will need a storage tank and is worth the money for energy savings.
In my experience, this is not true. We now have turned up the temperature to the max, I can't read the knob but it is turned all the way. We have also reduced the pressure of the incoming water to help it heat more effectively.
While we have noticed a difference in the amount and temperature of the hot water I still can't take a full shower with hot water. At best it goes from hot to tepid within a few minutes.
In my experience, this is not true. We now have turned up the temperature to the max, I can't read the knob but it is turned all the way. We have also reduced the pressure of the incoming water to help it heat more effectively.
While we have noticed a difference in the amount and temperature of the hot water I still can't take a full shower with hot water. At best it goes from hot to tepid within a few minutes.
You coil it then totally shot, either leaking into the boiler or more likely 95% clogged. Raising the temp to aquastat should give you scalding hot water. You might have a bad aquastat. Either way, IMO, the indirect water heat is by far the way to go. Adjusting the aquastat is a temp measure at best.
does anyone have a tankless hot water heater? ive been seeing these alot lately on tv and in the stores. are they any good/better than the tank? thanks
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