DURABILITY ON-DEMAND.
INTRODUCING A COMPLETE LINE OF ON-DEMAND
GAS-FIRED WATER HEATERS.
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MODEL SELECTION GUIDE.
Average Ground Water Temperatures
Ground water
temperature factor.
The temperature of incoming ground
water (cold water inlet temperature)
varies greatly throughout the U.S. and
also fluctuates with change of season.
The temperature of water as it enters the
water heater will determine the amount
of “temperature rise” required to achieve
the desired hot water outlet temperature
(120°F is recommended).
The best way to measure your incoming
ground water temperature is to use a
thermometer to measure cold water tem-
perature during the coldest season
of the year. To simplify the process, use
this map to determine whether your
SOUTHERN ZONE
Average Ground Water
CENTRAL ZONE
NORTHERN ZONE
Average Ground Water
Temperature: 52°F to 61°F
Average Ground Water
Temperature: 37°F to 51°F
Temperature: 62°F to 77°F
installation location is in the Southern
Zone, Central Zone or Northern Zone.
Peak hot water demand.
Ground Water Temperature Zone
Appliances or fixtures
in simultaneous use
during peak demand
The next step is to determine how much
hot water will be required during its
busiest usage period (“peak demand”).
To use the chart, consider all appliances
and fixtures that use hot water, including
lavatory faucets, kitchen faucets, washing
machines, dishwashers, showers and bath-
tubs. Be sure to determine how
Southern Zone
Central Zone
305 or 505
305 or 505
(2) 505 or 705
(2) 505
Northern Zone
1
305 or 505
305 or 505
505 or 705
(2) 505
305 or 505
305 or 505
(2) 505
2
3
4
5
(2) 505
(2) 505
(2) 705
(2) 705
6 or more
Multi-system
Multi-system
Multi-system
many appliances and fixtures will be used
at the same time during peak demand.
* Note: This Selection Guide is based on 120° F outlet water temperature.
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STATE DURABILITY
ON-DEMAND.
MODEL SPECIFICATIONS
BTU Input
Approximate
Shipping
Weight (lbs)
Model
Number
Natural / Propane
Hot Water Output (GPM)
Minimum
Maximum
Maximum
45º F Rise
77º F Rise
INTERIOR MODELS
GTS-305-NI
15,000
15,000
19,000
19,000
199,000/190,000
199,000/190,000
237,000
5.3
8.5
9.8
9.8
5.3
7.4/7.1
8.8
4.2
4.2
5.1
50
50
55
55
GTS-505-NI
GTS-705-NI
GTS-705-NIA*
237,000
8.8
5.1
For propane, change “N” to “P” in model number (GTS 305-PI).
* 705-NIA models are ASME Certified.
BTU Input
Approximate
Shipping
Weight (lbs)
Model
Number
Natural / Propane
Hot Water Output (GPM)
Minimum
Maximum
Maximum
45º F Rise
77º F Rise
EXTERIOR MODELS
GTS-305-NE
15,000
199,000
5.3
8.5
9.8
9.8
5.3
7.3
8.7
8.7
4.2
4.2
5.1
50
50
55
55
GTS-505-NE
15,000
19,000
19,000
199,000
237,000
237,000
GTS-705-NE
GTS-705-NEA*
5.1
For propane, change “N” to “P” in model number (GTS 305-PE).
* 705-NEA models are ASME Certified.
For more information on State On-Demand Water Heaters, contact:
State Water Heaters
500 Tennessee Waltz Parkway
Ashland City, TN 37015
800-365-0024 Toll-free USA
January 2008R
SRGBR00407
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