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Common Questions for Rheem Tankless
Water Heaters?
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1) What is a
tankless water heater?
- Tankless water
heaters are compact in size and provide a steady flow of hot
water for as long as you need it. Rheem tankless gas water
heaters are more energy efficient than conventional water
heaters, because the tankless models eliminate the need for
re-heating stored water.
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2)
How does the Rheem tankless water heater work?
- A conventional
tank-style water heater stores hot water, and heats the
water 24/7, whether you use it or not. The new generation
Tankless Technology Water Heater from Rheem only heats water
on demand. When the faucet is opened, the water flows
through the Rheem Tankless Water Heater, which heats it to
the temperature you've digitally set. When the faucet is
closed, the Rheem Tankless Water Heater senses the command,
and goes to standby mode.
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3)
Can it be installed
in the same place my old hot water heater was installed?
- As long as enough
combustion air is provided, Rheem tankless water heaters can
be installed in a utility room, garage, basement, attic, or
placed on an outside wall. Plus, they can be installed in
locations where a storage water heater may not fit. The
Digital Temperature Controller can be mounted in any room.
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4)
Are tankless water
heaters energy efficient?
- Yes, tankless water
heaters are very energy efficient. The Energy Factor, EF, of
all Rheem tankless water heaters is over .81. By comparison,
a standard tank type water heater has an EF of around .62,
so you can see that they are inherently more efficient than
a storage type water heater.
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5)
Is a tankless water heater more energy efficient than a
tank?
- Rheem tankless gas
water heaters are more energy efficient than conventional
water heaters, because they eliminate the need to maintain a
large supply of heated water. A Rheem tankless water heater
operates only when hot water is needed. Regardless of
whether you currently have a conventional electric or gas
water heater, the Rheem tankless will save money on your
energy bills. In addition, every Rheem tankless water heater
qualifies for up to a $300 [tax credit?]
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6)
What is the Energy
Factor for the RTG-42 series water heaters?
- Answer: 0.83
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7)
What is the Energy
Factor for the RTG-53, RTG-74 and 199 series water heaters?
- Answer: 0.82
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8)
Does this mean
tankless water heaters have lower operating costs?
- A higher EF is only
one of many reasons why tankless water heaters cost less to
operate. A Rheem tankless water heater has no standing pilot
light, no stand by loss, and the burners modulate to
maintain maximum efficiency.
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9)
How do I ensure that
I select a tankless water heater in the appropriate size for
my home?
- It's as easy as
1-2-3! If your home has only one bathroom, a Rheem tankless
RTG42 series water heater provides an ample supply of
continuous hot water for your needs. If your home has two
bathrooms, a Rheem RTG-53 series water heater provides an
ample supply of continuous hot water for your needs. If your
home has three bathrooms, choose a Rheem RTG74 series, which
can supply up to 3 showers simultaneously. Homeowners with 3
or more bathrooms and/or large volume multi-head showers
should consider linking (manifolding) 2, 3, or more of our
tankless water heaters together.
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10)
Does Rheem offer
customer service for their tankless water heaters?
- Yes! Rheem Customer
Service is available 7 days a week/7 a.m. to 7 p.m. Central
Time. The professional staff provides fast, reliable
service. Customer service options are available, please call
1-866-720-2076 or visit www.rheemtankless.com.
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11)
What is the minimum
water flow rate required for the tankless water heater to
ignite?
- All Rheem tankless
water heaters require a minimum flow rate of .66 GPM to
ignite the burner. Too little flow will not activate the
main burner.
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12)
What type of exhaust
venting do these products require?
- The venting must be
Category III, Stainless steel, and it applies to the
adapter, the vent pipe, all elbows, and terminal vent. This
is important because the flue gases and by-products of
combustion can cause condensation. Stainless steel will not
deteriorate like type B venting under these conditions. The
RTG-53X, RTG-74X and GT-199X outdoor models do not require
any venting materials. Always consult the Use and Care
Manual provided with the water heater for detailed
installation and venting instructions.
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13)
Can you adjust the
water heater setpoint temperature setting in 1 degree
increments?
- No, the minimum
temperature adjustment for RTG series waters heaters is a 2
degree increments from 100 F up to 120 F and 5 F increments
from 120 F to 140 F.
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14)
What are the temperature setting options for each model?
- The minimum
temperature adjustment for GT series water heaters is a 2
degree increments from 100 F up to 120 F and 5 F increments
from 120 F up to 180 F.
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15)
What safety device is
used to prevent overheat failure of the heat exchanger?
- An Over Heat
Limiting Film wrap is wrapped around the entire heat
exchanger. This monitors the temperature of the heat
exchanger and will shut the unit down if it exceeds a safe
temperature. This is an exclusive feature of the Rheem
tankless water heaters.
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16)
What is the minimum clearance on the back, sides, top,
bottom, and front of the water heaters?
- 0" back, 1/2" sides,
12" top, 12" bottom, and 12" front.
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17)
What does the sensing
burner do?
- The sensing burner
is a device that detects incomplete combustion during
operation of the water heater. If incomplete combustion is
detected, the water heater corrects the problem to provide
clean, efficient water heater operation at all times. This
is an exclusive feature of the Rheem tankless water heaters.
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18)
Is there a standing
pilot?
- No, the direct
ignition sends a spark to the main burner when hot water
flow is detected. This feature improves the energy
efficiency of the water heater.
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19)
Can the water heater
be installed at elevations that are 5,000 or 6,000 feet
above sea level?
- All Rheem tankless
water heaters can be programmed to operate at elevations up
to 9,840 feet. Optional programming chips are available for
elevations greater than 3,280 feet above sea level. One
programming chip is available for elevations between 3,280 -
6,560 feet, and a second optional chip is available for
elevations between 6,560 - 9840 feet. The chips install on
the water heater circuit board (PCB) in a matter of minutes
and are available from the Rheem Service Parts Department.
This again is an exclusive Rheem feature and is designed to
insure proper combustion at these higher altitudes.
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20)
Can I convert the water heater from LP to natural gas or
natural gas to LP?
- No, these units can
not be converted from one fuel source to another.
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21)
Where in my home can
I install a Rheem tankless water heater?
- The RTG-42PV,
RTG-74PV, and GT-199PV indoor units are very versatile, and
can be installed in a utility room, a garage, a basement, or
an attic as long as enough combustion air is provided. As
with any appliance, consult local codes and the manufacturer
Use and Care manual prior to choosing the site for
installation. They may not be installed in a bedroom or
bathroom, and are not designed for use in mobile homes. The
RTG-53DV, RTG-74DV, and GT-199DV may be installed in all
locations, including bedrooms and bathrooms. These units
obtain combustion air from the outdoors. These models are
not designed for use in mobile homes. The RTG-74X and
GT-199X outdoor models are for outdoor installations only,
and are a great alternative if your climate is appropriate.
This saves space and the cost of venting.
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22)
What are some reasons to use a tankless water heater over a
standard storage-type water heater?
- Tankless water
heaters can provide a continuous supply of hot water, while
a tank will run out of hot water. Tankless products also
have a longer life; lower operating costs, precise delivery
temperature, and can be installed in many locations where a
storage water heater may not fit.
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23)
How much can I expect
to save on my monthly bill if I install a tankless water
heater?
- Test results have
shown that a tankless gas water heater costs about 40% less
to operate than an electric water heater, and about 30% less
than a natural gas water heater.
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24)
How much more do they
cost to purchase?
- Generally, a
tankless water heater will cost about 2 to 2-1/2 times as
much as a standard water heater to purchase and install.
Keep in mind that in addition to lower operating costs,
useable square footage is gained by choosing tankless!
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