

Get an endless supply of hot water from a compact, wall-mounted tankless water heater that will afford you substantial savings in energy costs.
The 110 Series is perfect for apartments, summer cabins, condos, and one bath homes in cold climates. A remote control is included as a standard feature.
Features
Freeze Protection
Every tankless heater by State Industries has an internal freeze protection system, rated to protect the heaters in sub-freezing conditions. This prevents water temperatures in the heat exchanger from falling below a certain level, to prevent freeze damage.
Hi-Limit Switch
This ensures that the water temperature does not exceed dangerous levels. It disengages the gas valves, which effectively shuts down the water heater.
Air-Fuel Ratio Sensor
State's unique sensor monitors and maintains optimal combustion at all times. The onboard computer adjusts the fan motor speed to make sure that air and fuel are mixed in the proper ratio to minimize emissions and maximize efficiency.
HRS35 Copper Alloy
The HRS35 copper alloy is heat-resistant, with additive elements which make it much harder and stronger than the standard C1220 copper alloy commonly used in other heat exchangers. HRS35 is 8 times stronger than regular copper, even at high temperatures. It's also resistant to the damaging effects of corrosion which is the leading cause of leaks in heat exchangers.
Drum Thickness
The thousands of on-off heating cycles (thermal expansion and contraction) in all tankless water heaters creates stress to the the heat exchanger material. Without proper product design and engineering, it can damage water heaters. This is why State's heaters utilize heat exchangers with drums that are 25% thicker to ensure durability. A thicker drum produces less strain for the heat exchanger.
Better Water Pathway Design
By redirecting and redesigning water flow, the heat exchanger drum and finned coil's temperature stay above dew point, making it more difficult for condensation to build up.
Fin Pitch
Widening the pitch at the heat exchanger fins not only improves durability by reducing blockage, but it also maintains higher temperature levels on the upper finned coils. Keeping an elevated temperature at these coils reduces the chances of condensation buildup.
Match the Unit to Your Needs
Warmer Climates 70°F Incoming |
Colder Climates 50°F Incoming |
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Capacity - Number of Shower Heads | ||||
GTS-110/U | 2 |
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1 | ![]() |
GTS-310/U | 3 |
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2 |
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GTS-240H | 2 |
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1 | ![]() |
GTS-340H | 3 |
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2 |
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GTS-540H | 4 |
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3 |
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GTS-510/U | 4 |
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2 |
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GTS-710 | 4 |
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3 |
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GTS-910 | 6 |
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4 |
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Flow Rate Guide (values are in gallons per minute, "GPM")
Temp Rise | 110/U | 310/U | 510/U | 240H | 340H | 540H | 710 | 910 |
30° | 6.6 | 8.0 | 10.0 | 6.6 | 8.0 | 10.0 | 9.0 | 14.5 |
35° | 6.6 | 8.0 | 9.3 | 6.6 | 8.0 | 10.0 | 9.0 | 14.5 |
40° | 5.7 | 7.8 | 8.1 | 6.6 | 8.0 | 9.5 | 9.0 | 14.5 |
45° | 5.1 | 6.9 | 7.2 | 6.6 | 7.6 | 8.4 | 8.5 | 13.5 |
50° | 4.6 | 6.2 | 6.5 | 6.1 | 6.8 | 7.6 | 7.7 | 12.2 |
55° | 4.2 | 5.7 | 5.9 | 5.5 | 6.2 | 6.9 | 7.0 | 11.1 |
60° | 3.8 | 5.2 | 5.4 | 5.1 | 5.7 | 6.3 | 6.4 | 10.1 |
65° | 3.5 | 4.8 | 5.0 | 4.7 | 5.3 | 5.8 | 5.9 | 9.4 |
70° | 3.3 | 4.4 | 4.7 | 4.3 | 4.9 | 5.4 | 5.5 | 8.7 |
75° | 3.1 | 4.1 | 4.3 | 4.1 | 4.6 | 5.0 | 5.1 | 8.1 |
80° | 2.9 | 3.9 | 4.1 | 3.8 | 4.3 | 4.7 | 4.8 | 7.6 |
85° | 2.7 | 3.7 | 3.8 | 3.6 | 4.0 | 4.4 | 4.5 | 7.2 |
90° | 2.5 | 3.5 | 3.6 | 3.4 | 3.8 | 4.2 | 4.3 | 6.8 |
95° | 2.4 | 3.3 | 3.4 | 3.2 | 3.6 | 4.0 | 4.0 | 6.4 |
100° | 2.3 | 3.1 | 3.3 | 3.0 | 3.4 | 3.8 | 3.8 | 6.1 |
Specifications
Natural Gas | Liquid Propane | |
Installation Type | Indoor, Outdoor, Direct Vent | |
Dimensions | 20-1/4" (H) X 13-3/4" (W) X 7-3/4" (D) | |
Weight | 33 lbs | |
Electric | 120 V, 0.77 A (Operation), 0.052 A (Standby), 0.93 A (Freeze Protection) | |
Ignition | Electronic Ignition | |
Noise Level | 55 dB at Max output | |
Min. Input | 19,500 BTU/h | 19,500 BTU/h |
Max. Input | 140,000 BTU/h | 140,000 BTU/h |
Energy Factor | 0.82 | 0.82 |
Min Gas Pressure | 5.0" W.C. | 8.0" W.C. |
Max Gas Pressure | 10.5" W.C. | 14.0" W.C. |
Flow Rate | 6.6 GPM. Values based on factory testing. 0.4 GPM required for continuous fire after initial ignition. | |
Hot/Cold/Gas Connection |
3/4" NPT | |
Coil Capacity | ≈0.2 Gallons | |
Water Pressure | 15-150 PSI. Pressure Only Relief Valve Requires (Min 200,000 BTUs. 150 PSI). 40 psi or above recommended for max. flow. | |
Easy-Link System | N/A | N/A |
Multi-Unit System | N/A | N/A |
Dipswitches | 113°F 122°F (default) 131°F 140°F | |
Temperature Settings | With 9007666005 remote (max. distance 400’ from heater, non-polarized 18 gauge wiring.). 99°F to 167°F (16 options), 122°F Default Factory Setting |
Dimensions
Warranty
• Residential Use: 15 yrs limited heat exchanger, 5 yrs limited parts