No, he did not, but your answer was no help at all was it? When I was
buying a new DW last year I checked a few manuals from different bands that
I was considering. Not one of them had water use ratings. If you had said
my old machine state it uses from 5 to 7 gallons, depending on cycle, that
would have been of some use. Most brands have manuals available on line if
you care to check them out.
I bought a Whirlpool less than an year ago and the book has the water usage
in it. It is under the cycle selection charts. It uses from about 6 to 11
gallons of water depending on the settings.
It also gives the times of usage. Around 70 to 90 min.
Thanks Ralph -
I will use 11 gallons as a guide per load. If that is the case - then a
2.5 gallon electric water heater will not serve it well. I presently
have a 50 gallon water heater serving just a kitchen sink and dishwasher
- silly - I know. I want to replace it.
If this is a unit that can heat it's own water, than it's irrelevant (other than
the additional time it takes for the dishwasher to bring the water up to
temperature). Electric water heater vs. dishwasher heating the water...it's
I have a Whirlpool Gold dishwasher and 2.7 Gal under sink hot water heater.
What I have found is that the washer uses about 3 gallons per phase of a cycle,
but the phases are not evenly timed. The first rinse cycle uses all the hot
water, and the under sink unit has not quite recovered by the time the wash
cycle starts just several minutes later and again uses all the hot water.
Bottom line is that the washer gets enough hot water though with some cold mixed
in, but it does completely deplete your hot water supply with each fill. By the
way, the partial recovery time for the 2.7 gallon water heater is only a minute
or so before it will start delivering small quantities of hot water again, for
washing hands, etc. Our washer has a rinse and wash fill in rapid succession, a
long wash period where it also additionally heats the water, and then one (or
two) final rinse cycles.
My Kenmore has "water heat" option. Seems like it would cost the same
to heat the water with a remote electric heater as it would to just
let the dishwasher do it itself. Heating the water adds a fair amount
of time to the cycle... I think around 20 to 30 minutes.
the OP needed to supply some additional information since there are many
differnet dw on the market and they may vary in the amount of water they use.
My post suggested to the OP to read the manual. If he had posted..'I read the
owners manual and it doesn't say how much it uses..' then I wouldn't have
posted my message Richard.
Edwin Pawlowski wrote:
I've seen wildly varying figures from 2 to 20 gallons, but the newer ones
seem to be closer to 5. The maker seem to be vague on the matter.
From the Whirlpool web page:
Do I use more water hand washing or using a dishwasher?
You use 2 times as much water by hand-washing dishes. It
costs about 15 cents per load to use your dishwasher and about 2 cents per
load to use the dry cycle.
The average water use per dishwasher cycle decreased from a
range of 11-15 gallons per normal cycle in 1978 (Garrett, 1978) to 6-10
gallons per normal cycle in 2000 (Soap and Detergent Association [SDA],
2000). Despite the fact dishwashers are designed to be resource efficient,
other significant determining factors on resource usage are the result of
decisions of the consumer.
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Thanks Ed -
I am sorry I was not more specific. The dishwasher is a Whirlpool Gold
that I installed in 2004. I was in bed and could not go check the model
last night :-)
The reason I am asking is because I am planning to replace two big
electric water heaters - with maybe one one or two smaller gas or
electric units. My kitchen is on one end of a 90 foot house and my
bathrooms on the other end. But through poor engineering - the water
heater near the kitchen services the bathrooms on the other end of the
I am planning to put one tankless water heater right next to my shower
and then run a 1/2 insulated line "up and over 100 feet" to the sink and
dishwasher in the kitchen.
Another option is to put one of those little 2.5 gallon water heaters
under the sink next to the dishwasher. Just a thought. It is foolish for
my wife and I to be heating two giant tanks of water - 24 hours a day -
for two shower - a load of laundry - and a load of dishes.
My washer specifies incomming water to be atleast 120 deg F. It is then
heated to 140 to 160 deg F depening on the cycle used.
I would assume most washers would have internal heaters to get the water hot
enough. The recommended setting for the house water heater is usually less
than 130 deg F.
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