my new dishwasher a whirlpool heats water. but thye cycle time
tripled. and went back to normal when I increased water heater hot
my old bopsch heated water fast, but in 3 years broke 4 times.
it was the best cleaninmg dishwasher I ever owned, and also the most
unreliable and worse hard to service.
it got put in the trash, deservedly
but dont assume a dishwasher will heatr water well
Many dishwashers have a heating element that will heat the water anyway
so you don't really gain anything by adding a water heater for the
Any small point of use in-line water heater would work for the kitchen
faucet. Or maybe consider a separate electric point of use faucet. I
have one of those on my kitchen sink but don't use it much as the water
is very hot, near boiling.
cycle time will skyrocket to many hours for just a single load.
dishwashers arent designed to start with cold water.........
the multi hour cycle time will be inconvenient, wear out dishwasher
parts sooner, and run up energy costs
I had a Whirlpool gold DW that has a cycle (automatic) just for heating
the water if it was not hot enough. Many times I would save the
dishwasher to last after doing showers or laundry. The water would be
too cold to take a shower but I didn't worry about the DW, I just let
the heat cycle work as designed. The dishwasher would take noticeably
longer but not hours, maybe 20 min longer. Though my water was not ice
cold, but I believe my situation was similar to the OP. The OP said
(in his 2nd post) that the main water heater is too far away. He never
said the DW was connected to the cold line.
For the OP energy cost are a wash because he has to add a 2nd water
heater just for the kitchen so the same energy cost goes to the WH
instead of the DW.
If it were me I would get a small under-cabinet water heater for the
sink and not worry about the DW unless the DW did not have the heating
Convenience is my primary reason for adding the heater for the kitchen.
Every time you go to rinse something in the kitchen, it takes the better
part of a minute before warm water begins to arrive at the faucet. Often you
only want warm water for a brief period, but it requires filling the line,
(mostly 3/4"), with hot water which will be wasted.... plus the
inconvenience of having to wait for it. As you suggested, I could add
a small heater just for the sink, but that would require adding another
faucet as I'd still need the existing faucet in order to bring hot water to
that point prior to starting the DW. My remodel doesn't include the sink
area. It is my intention to isolate the kitchen from the hot water line
supplied by the propane heater at the other end of the house.
I'd isolate the kitchen from the rest of the house hot water line, by puting
a gate valve in the line just before the kitchen. This has the added
convenience of turning a minor emergency into less urgent repair if the
main hot water heater fails. This happened to me at my previous house, where
I had added a second heater for the bathroom as part of a bathroom remodel.
Some time later, the heater in the garage failed and I was able to simply
cap it off, and open the gate valve, and then choose a replacement heater
for the garage at my convenience, instead of it having an emergency
replacement situation on my hands.
Energy costs are not my consideration. There are so many variables including
the widely fluctuating price I pay for propane at various times of the year,
to be able to make any meaningful comparison. As I said, my motivation is
convenience. Incidently, rather than asking for advice on the merits of
adding a seperate heater for the kitchen, my original question was for
suggestions about which brands of electric heaters might be better. Only one
poster has addressed that question.
you could also add a recirculation line, either manually or
automatically controlled, to provide hot water at all times to the
kitchen without wasting watwer.
for electric you need the coldest water temperature you ever get in
late winter, the tem rise of the perspective heater, and the maximum
flow with both dishwaser and sink full on, then see how many spare
amps your main service has spare.
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