a friend of mine was telling me that there is a new product that keeps constant hot water in your house. instead of a typical (bulky) hot water heater, this new small product takes it's place. i don't have a clue what it's called. does anyone have any info on this? a web site?
Tankless dont keep hot water they are on demand heaters and wont run
out. Electric for most is double the price of gas. Look into a Bosch
Aquastar. A recirculator pump will keep hot water in pipes, but you
It shouldn't be considerably different.
It takes 1 British Thermal Unit (BTU) to raise 1lb of water 1 degree F.
Whether you heat it all at the same time (tank) or continuously
(tankless) doesn't matter in terms of energy consumed. Obviously a tank
heater will have some storage loss, but I wouldn't expect that to be
"considerable" from an energy use point of view.
If you want to just do your master bath, then you could go with a
point of use model. These are available in electric models. I just
put one in a full bath (shower & sink). I installed it in the
vanity cabinet. The unit was about $200 and it required cutting
into the wall and reworking the plumbing. I had to bring a 220
volt line in also. Took about a day to do everything.
I got the unit from Niagara. Here is their website:
I installed a 220 volt unit, but they have 120 volt units also.
As a test, I turned the shower on full hot and left it running for
an hour and a half. It produced very hot water for the entire
time. I turned the unit down a notch because it was a little on the
TOO hot side.
actually one of the biggest losses isnt through the tank at all. its
through the pipes going into it, particularly the cold water pipe. you can
check this yourself. go feel the inlet pipe right next to the heater and
move your hand away. it gets colder. while its somewhat intuitive to
insulate the hot water line, you should insulate 5' of the cold water inlet
pipe as well.
Tanks loose efficiency from day 1 with scale buildup, Tankless dont and
last 2-3 times longer. I removed a 5 yr old electric , high insulated
Rheem with a blanket and reduced bills from 30 electric to 6 in gas.
Considering electric to be double the cost of gas I still lowered my
bill 50% + . My payback on the Bosch is 3 yrs. Apx 1/3 of gas used is
for water heating, that is alot of gas , a cost I view as money going
down the drain. Gas tankless are better than ever, they have been
standard in most countries for over 20 years they are a true quality
alternative we are only now leaning about. Bosch and Takagi make units
for most any home and are quality. They even have units that require no
electricity for ignition, one uses batteries, 2 D cells, mine are 2.5
yrs old and just tested with maybe 2 yrs left. And one with a mini Hydro
generator and remote upstairs thermostat. They are really worth
I don't know. It's an old system that was here when I moved in. I'd
have to factor in that my hot water system is oil and the rest of my
energy use is electric (and a small amount of gas for stove and
dryer). My guess would be that in the winter when the furnace is on,
the hot water production would be really cheap, whereas in the summer
I'd have to balance keeping the furnace on vs. the cost of running a
dehumidifier in the basement.
Oh, another advantage of the instant on- since I have an interior oil
tank it saves me space in the basement by not having yet another tank!
OTOH, a disadvantage, at least with mine, is that it takes some
fiddling to get the water temperature correct. Mine works by mixing
hot (HOT! SCALDING! REALLY, REALLY HOT!) water from the boiler with
cold water. When I moved in the faucets were putting out 190+
water... I had to go back and forth a bit with the mixing valve to get
it to 130-ish. I imagine that with a stand-alone system you wouldn't
have that problem.
My system is installed in the basement and produces hot water for the
Lead me not into temptation... I can find it myself!
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