the world`s first hybrid water heater
the world's first hybrid water heater
Life is better
with Eternal
Hybrid Evolution .................................... 1
Uncompromised Engineering ................. 3
– Breaking
– Divide
– Brain
the Law .................................... 4
and Capture ................................ 5
and Brawn ..................................... 7
Performance ......................................... 8
Testimony ............................................. 9
Green Living ............................................ 10
Energy Efficiency ................................. 11
Safety and Precision ........................... 11
HYBRID EVOLUTION
Grand Hall® brings tank and tank-less technologies together in the first of its kind Eternal® Hybrid water heater.
The patented and powerful Hybrid design replaces multiple tanks, consumes less energy and space than a single tank and
produces endless hot water on-demand to meet all your water heating needs.
The intelligent Eternal computer module monitors performance, safety, and changing conditions precisely to provide reliable
heat output. Relax, the computer does the worrying, so you don’t have to.
The advanced Hybrid technology also makes Eternal one of the cleanest gas burning appliances on the market. Go ahead;
take long showers completely guilt-free.
The Eternal Hybrid is the latest example of Grand Hall’s mission to bring life improving innovations to home owners by
utilizing efficient and environmentally friendly designs.
THE ETERNAL HISTORY
William, Grand Hall’s founder and president, is a guy who loves to find solutions to everyday problems. As a frequent traveler, William likes to unwind with a hot bath. However, he returned home frustrated trip after trip because the traditional water
heater in the house cannot supply enough hot water for the tub. William decided to end his frustration by installing a tankless water heater.
The story could have ended happily ever after, but William quickly experienced the limitations of tank-less technology. During
the morning rush-hour when showers and appliances are running, the person in the shower would be hit with a sobering cold
shock.
Determined to solve the age old water heating problem, William commissioned a team of engineers to design a water heater
that supplied endless hot water and maintained consistent temperature and pressure; 6 years and countless prototypes later,
the Eternal Hybrid Water Heater was born.
1
UNCOMPROMISED ENGINEERING
Tank water heaters supply hot water for multiple applications at the same time, but you are limited by how long the supply
can last. Tank-less water heaters supply endless hot water, but you are limited to only a few applications at the same time.
Grand Hall engineers refused to compromise the Hybrid design to known limitations. Through innovation, Eternal Hybrid
technology offers you consistent hot water for multiple applications at the same time, endlessly and efficiently.
3
BREAKING THE LAW
Being a good citizen of the environment sometimes means breaking the laws of physics. Eternal Hybrid technology achieves high
heating efficiency by utilizing a brilliant counter-flow design that contradicts physics as we know it.
In a traditional tank water heater, heat is
Tank-less water heater passes water through
Eternal Hybrid’s patented system works
produced at the bottom of the tank and cold
a heat exchanger made of coiled copper pipes.
on the principle of counter flow, with cold
water is deposited from the top. Naturally,
The unit superheats water almost instantly and
water entering from the bottom of the tank and
heat rises and escapes through the exhaust
endlessly. But passing water through wind-
a top mounted turbo burner that forces heat
while cold water rests at the bottom of the tank
ing pipes means the flow of water is slowed
downward. This reversal of physical elements
with little energy transfer. This is why a tank
down. Reduction of flow is necessary for
achieves an impressive 86% thermal efficiency,
heater takes time to recover once it runs out of
energy transfer but at the cost of lower
which produces hot water quickly. Our break-
hot water.
pressure to your shower, tub, sink or appliance.
through Hybrid technology uses no coiled pipes
in the heat exchanger tank, so water is heated
with no pressure loss.
DIVIDE AND CAPTURE
There are two variables in water heating: velocity of heat and velocity of water.
In the tank design, heat and water pass each other quickly, resulting in low energy transfer and low efficiency. In the tankless design, water flow slows down to capture as much escaping heat as possible. Eternal Hybrid’s counter flow design
takes the opposite approach by trapping the heat.
Eternal smartly directs escaping heat into 44 individual heat transfer pipes, each containing a heat trapping baffle. Because
heat doesn’t escape, water flows at full speed while capturing all the heat.
Another secret to Eternal’s highly efficient heating process is spreading water thinly and evenly around the 44 heat transfer
pipes. Because of the even and wide surface contact between water and heating elements, hot water is produced quickly
without sacrificing pressure.
5
BRAIN AND BRAWN
Eternal’s highly intelligent computer module controls and monitors the entire heating system, ensuring all components are
working in harmony to deliver exactly the temperature of water you asked for.
Turbo: Like the automotive turbo, this
blower force injects perfectly premixed
air and fuel into the combustion
chamber for maximum performance.
Heat Exchanger Tank: The powerful
and compact design produces an
endless flow of hot water at your
specified temperature setting.
DC Transformer: The transformer filters out
surges from A/C current and provides steady
power to the system. The system also has a
power-out memory feature so you won’t need
to reset the system after a blackout..
HOT WATER FLOW
COLD WATER FLOW
GAS FLOW
7
Sirocco Exhaust: This exhaust fan
moves large amounts of air and ensures
that all harmful exhausts are vented
outside your home.
Dual Stage Gas Valve: The two stage design
ensures your safety. If one stage fails, the
second stage will shut down the flow of gas
in case of emergency.
Mixing Valve: This electronically controlled
valve will draw cold water to lower the
temperature of the water flowing to the outlet
if the system determines the temperature to be
higher than desired setting.
Leakage Breaker: This protective device is wired
directly to the transformer. Any electricity leakage
will cause the breaker to shut the system down at
the power source.
PERFORMANCE
100%
PRESSURE MAINTAINED AT HOT OUTLET
ETERNAL
TANKLESS
91.66%
97.58%
80.55%
80%
76.0%
60%
47.50%
This graph illustrates the difference of inlet
and outlet pressures between Eternal and
tank-less. Note as demand increases, the
tank-less unit starts to lose pressure at the
outlet.
40%
1 TAP (SHOWER)
105O
2 TAPS (SHOWER + KITCHEN)
3 TAPS (SHOWER + KITCHEN+ LAUNDRY)
TEMPERATURE VARIATION OVER FLOW ( OF)
ETERNAL
TANKLESS
103O
101.48O
100O
102.56O
98.6O
98.6O
95O
The temperature variation across different
flow rates mimics the pressure drop pattern
seen above. Note that under higher demand,
the shower temperature cooled by 13 degrees with the tank-less.
91.4O
90
O
2 GPM
105
O
3.4 GPM
4GPM
ETERNAL
TEMPERATURE VARIATION OVER TIME ( OF)
104O
98O
96
98O
O
100O
91O
91O
95
O
75O
90O
1MIN
4MIN
8MIN
TANKLESS
TANK
This graph shows how all 3 types of water
heaters perform over time. Only shower tap
is used for the first 3 minutes and additional
taps are opened at 4 minutes. The temperature variation is most noticeable on the tankless; however, as time progresses, the storage
tank water heater runs out of hot water.
TESTIMONY
So, what does it take to convince skeptics that hybrid technology is the ideal water heating solution for the modern home? How
about a 5,300 sq ft home with 4 full baths, 3 half baths and an outdoor shower? Featured at the Villa Pacifica, recent “People’s
Choice” winner of the Dallas Parade of Homes, one single Eternal provided endless and instant* hot water throughout the home.
So convinced were the builder and plumber, they have installed Eternal systems in many projects since.
Custom homebuilder Steve Penhollow says:
“The Eternal Hybrid is the next generation in water heating and helps me build energy efficient, intelligent homes. And with the
space savings I get immediate payback on the decision.” Evan Ford, master plumber adds “The Eternal is installation friendly and
goes in just like a traditional tank system. Once I installed my first Eternal Hybrid, I knew immediately this was going to become the
frontrunner in the water heater industry.”
*installed in a closed loop system with recirculation pump
Steve Penhollow, president of Penhollow Custom Homes and Evan Ford of the Plumbing Connection with their Eternal Hybrid installation.
9
GREEN LIVING
Did you know that home appliances are the fastest growing group of pollution emitters after automobiles? According to
Worldwatch Institute, home appliances such as water heaters account for 12 percent of greenhouse gases emitted in industrial
countries. The Union of Concerned Scientists, in turn, has stated if homes in the US replaced their existing appliances with more
efficient models, 175 million tons of heat-trapping gases would be eliminated! Grand Hall recognizes the responsibility in designing
earth friendly products to protect our most precious asset – the environment.
SCAQMD (South Coast Air Quality Management District) stipulates that water heaters must meet certain emission guidelines in order to be sold and operated in Southern California, which has one of the toughest emission requirements. According to SCAQMD,
a water heater should have less than 55ppm NOx under maximum combustion.
At its lowest, the Eternal Hybrid water heater emits 5ppm NOx. The low emission means an earth friendly product that not only
saves you energy but also keeps our environment clean.
Low emission is achieved by the efficient combustion process. The turbo injects a perfectly premixed ratio of air to gas for combustion. Unlike traditional combustion which draws air from surrounding areas resulting in uneven mix of air to gas ratio, Eternal’s
clean combustion produces less byproducts. The exhaust simultaniously moves the byproducts out of the combustion chamber so
efficiency is not reduced.
Eternal is certified to meet SCAQMD low emission standards.
Please reference the environmental comparison chart in the back of the brochure for details.
ENERGY EFFICIENCY
Eternal Hybrid is an on-demand water heater, meaning that the burner is triggered by the opening of a hot water tap.
There is no pilot to waste gas and no heating and reheating 40, 50, or 75 gallons of water all the time.
In addition to on-demand design, Eternal Hybrid also has a high thermal efficiency of 86%. The higher the thermal efficiency,
the more heat is transferred onto water from the combustion process.
Don’t forget that Eternal is capable of replacing multiple tanks, yet uses less energy and space than a single
tank water heater!
Please reference the energy efficiency comparison chart in the back of the brochure for details.
SAFETY AND PRECISION
Our engineers are not just concerned with performance, but most importantly, your safety. That is why Eternal is
designed with double stage safety features.
For example, Eternal is equipped with a dual stage gas valve. The two stages are arranged in serial connection so one stage
can shut down gas flow should another stage fail.
Another example, the heat exchanger tank is equipped with dual stage overheat protection switches and fuse. Should the
heat exchanger overheat, the thermostatic switches will kick in and shut the system down, but if the switches failed, a fuse
wired directly to the gas valve will shut down the gas flow and the system.
Eternal is designed to be precise by means of its computer monitoring system. For example, if the heat exchanger is
producing 150oF water, but the set temperature is 120oF, the computer will send a signal to add cold water mix to the water
for final outlet at precisely 120oF.
You can rest assured that what you set is what you get. No need to worry about cold shock or scalding. Eternal is precision
designed for your safety.
11
endless. efficient.
the world's first hybrid water heater
Grand Hall has over 30 years of manufacturing experience in gas components and appliances.
Our experience translates into quality construction and Eternal reliability.
contact:
Grand Hall operates a 200,000 sq. foot distribution center located in Dallas, Texas with 20
years of customer support experience. So you can trust we’ll be here to take care of you.
Grand H
all U
SA
, Inc.
3838 W. Miller Road
Garland, Texas, 75041
Tel: 877-934-7455
Fax: 972-279-8440
Email: paul@grandhall.com
.w
eternalw
aterh
eater.com
US Patent No 6,945,197
In the interest of product development,
Grand Hall product designs, features
HUKZWLJPÄJH[PVUZHYLZ\IQLJ[[VJOHUNL
without notice.
© 2006 Grand Hall / Ver: 07-26-07
WARRANTY
WARRANTY
Eternal Hybrid is made of Stainless Steel, a recyclable material that is highly corrosion-resistant. The consistent quality is accomplished by our robotic manufacturing. This allows the Eternal Hybrid heat
exchanger tank to outlast the competition. The patented counter flow design means the tank is completely
self-cleaning. There will be no sedimentation to wear out the tank or degrade efficiency over time.
All Eternal components are monitored by the computer and should a malfunction occur, the front display will
flash an error code for easy troubleshooting. The modularized design makes replacing any of the components
quick and easy.
Lifetime N
o -L eak Warranty
- Heat Exchanger Tank
Limited 3 year Warranty – All other parts
1year Warranty – Reasonable labor
contact:
Grand Hall USA, Inc.
3838 W. Miller Road
Garland, Texas 75041
Tel: 877-934-7455
Or visit www.eternalwaterheater.com
INSTALLATION REQUIREMENTS
INSTALLATION REQUIREMENTS
Eternal is designed with ease of installation in mind. A licensed professional familiar with installation of
tank water heaters will be able to install an Eternal Hybrid just as easily. Please make sure all local
plumbing codes are followed when installing the Eternal.
Gas Supply
Recirculation
Eternal is installed with ¾” gas connection. Please ensure
Eternals built-in reservoir tank makes it an ideal candidate
proper gas line sizing for optimal performance. Sufficient
for closed loop systems.
gas supply is crucial to proper operation of the unit. The
Eternal is preprogrammed for LP/NG and easily field
Expansion
Tank
configured for either fuel type.
Hot Water
Water Supply
Fixtures
Eternal is installed with ¾” water connections. A Thermal
Expansion Tank may be required by your local code.
Gas Inlet
Shutoff Valve
Electricity Supply
Eternal requires 120VAC (60Hz) electrical supply and must
be grounded to operate properly.
Aquastat
Pressure
Relief
Valve
Unit Clearance
Install Eternal in accordance with code requirement and the
Pump
Grand Hall
Water Heater
Check Valve
Hot Water Return
Check Valve
manufacturer’s recommended clearance as shown in the
Operator’s Manual and labeled on the unit itself.
Venting Material
Drain
Cold Water Supply
Because Eternal is power vented it can be installed with
either 4” Schedule 40 PVC or 4” Category III stainless steel
venting. Termination can be either horizontal or vertical.
Combustion Air Supply
Eternal draws combustion air from its surrounding. Please
ensure sufficient air flow to the unit. Install Eternal in
accordance with code ventilation requirement.
Recirculation System with the Eternal Hybrid Water Heater
TYPICAL INSTALLATION
Each unit is pre-programmed for LP or NG (simply change one nozzle) and can be installed
indoor or outdoors. With one Eternal unit you can satisfy a wide range of installation options.
ENERGY EFFICIENCY COMPARISON
ENERGY EFFICIENCY COMPARISON
Eternal Hybrid is an on-demand water heater, meaning that the burner is triggered by the opening of a hot
water tap. There is no pilot to waste gas and no heating and reheating 40, 50, or 75 gallons of water all the
time. In addition to on-demand design, Eternal Hybrid also has a high thermal efficiency of 86%. The higher
the thermal efficiency, the more heat is transferred onto water from the combustion process. Don’t forget that
Eternal is capable of replacing multiple tanks, yet uses less energy and space than a single tank water heater!
Eternal GU26 model qualifies the homeowner
for up to a $300 federal energy tax credit.
ETERNAL HYBRID
TANK-LESS
TANK
Thermal Efficiency
86%
80%
60%
Average cost for 15 minute
shower 3 times per day
$0.60
$0.65
$0.86
Average cost for 15 minute
shower 3 times per day
for a year
$219.98
$236.40
$315.20
30%
25%
0%
Estimated Energy Saving
Compared to Traditional Tank
Estimated energy cost calculation is based on 45F rise and $1.15 per therm of Natural Gas. |
ENVIRONMENTAL COMPARISON
ENVIRONMENTAL COMPARISON
Did you know that home appliances are the fastest growing group of pollution emitters after automobiles?
Nitrous Oxide (NOx) is identified by the EPA as one of the six main pollutants, and is a contributor to global
warming, acid rain, as well as other environmental and health problems. According to SCAQMD, (South Coast
Air Quality Management District) a water heater should have 55ppm NOx under maximum combustion. At its
lowest, the Eternal Hybrid water heater emits 5ppm NOx. The low emission means an earth friendly product that
not only saves you energy but also keeps our environment clean.
Certified to meet SCAQMD
low emission standard
Low
NOx
ETERNAL HYBRID
TANK-LESS
TANK
Stainless steel
Copper
Steel
86%
Avg 80%
Avg 60%
NOx (ppm)
5 - 30
30 - 40
60 - 90
CO (ppm)
40 - 45
190 - 200
200 - 250
128 - 155
390 - 410
480 - 500
Construction
Efficiency
Exhaust Temp (F)
Comparisons shown are averaged based on typical tank and tank-less units. |
PRODUCT SPECIFICATIONS
PRODUCT SPECIFICATIONS
GU32 Eternal Hybrid
GU26 Eternal Hybrid
Installation
Indoor/Outdoor (outdoor kit req.)
Venting
PVC or Category III Stainless
Gas Type
Pre-programmed for NG or LP
Gas Input BTU/H
47,500 - 180,000
47,500 - 236,000
Res. Tank Size (Gal)
3.8
6.4
Flow Rate GPM
35 F Rise
9.5
12.1
45 F Rise
7.4
9.4
60 F Rise
5.3
7
70 F Rise
4.6
6
80 F Rise
4
5.2
90 F Rise
3.5
4.6
0.5 - 9.5
0.5 - 12.1
Capacity Range (GPM)
;OLYTHS,MÄJPLUJ`
US Patent No 6,945,197
86%
Ignition System
Electronic Direct Ignition
Tempurature Range
Unit Weight (LBS)
Dimension (HxWxD)
Gas
Connection
Water
Vent
100 - 167 in 15 steps
148.7
178.9
33.4"x17.3"x22.8"
40.9"x17.3"x22.8"
3/4" Female
3/4" Female
4"
In the interest of product development,
Grand Hall product designs, features
HUKZWLJPÄJH[PVUZHYLZ\IQLJ[[VJOHUNL
without notice.
© 2006 Grand Hall / Ver: 07-26-07
PRODUCT SPECIFICATIONS
PRODUCT SPECIFICATIONS
Features
Safety
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In the interest of product development,
Grand Hall product designs, features
HUKZWLJPÄJH[PVUZHYLZ\IQLJ[[VJOHUNL
without notice.
© 2006 Grand Hall / Ver: 07-26-07
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