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 540H is ideal for residential and commercial applications like beauty salons small restaurants. Complies with Ultra-Low NOx regulations. Features a heat exchanger tubing made from HRS35 copper alloy. The 540H is also suitable for heavy residential uses such as domestic recirculation systems or space heating. The indoor model is certified for use up to 10,100 ft. altitude.
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.
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.
At every ignition cycle, thermal expansion causes every heat exchanger to undergo heat stress. The thousands of ON/OFF cycles typical in commercial applications can be damaging to water heaters. This is why State Industry's commercial products utilize heat exchangers with drums that are 25% thicker to ensure durability. A thicker drum produces less strain for the heat exchanger.
316L Stainless Steel Secondary Heat Exchanger
The secondary heat exchanger, where the rest of the heat transfer happens, is made from high quality 316L stainless steel. Lower temperature causes acidic condensation, and stainless steel is needed to avoid corrosion. 316L stainless steel is more suitable in condensing heat exchangers because of the extreme environment (heat, chloride, acidic condensation) that the material is constantly subjected to.
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.
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
|Capacity - Number of Shower Heads|
Flow Rate Guide (values are in gallons per minute, "GPM")
|Natural Gas||Liquid Propane|
|Installation Type||Indoor, Outdoor, SCH 40 PVC Direct Vent|
|Dimensions||23-5/8" (H) X 17-3/4" (W) X 11-1/4" (D)|
|Weight||DV: 59 lbs OS:59 lbs|
|Electric||120 V, 1.27 A (Operation), 0.07 A (Standby), 1.73 A (Freeze-Protection)|
|Noise Level||55 dB at Max output|
|Min. Input||15,000 BTU/h||13,000 BTU/h|
|Max. Input||199,000 BTU/h||199,000 BTU/h|
|Min Gas Pressure||5.0" W.C.||8.0" W.C.|
|Max Gas Pressure||10.5" W.C.||14.0" W.C.|
|Flow Rate||10 GPM. Values based on factory testing. 0.4 GPM required for continuous fire after initial ignition.|
|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||Up to 4 units, with no need for a system controller.|
|Multi-Unit System||Up to 20 units, with Multiple-Unit Controller 9008300005.|
|Dipswitches||100°F 105°F 110°F 115°F 120°F (Default) 125°F 130°F 135°F 140°F, 145°F 150°F 155°F 160°F 165°F 170°F 175°F and 185°F (17 options)|
|Temperature Settings||100°F to 185°F with 5°F intervals (16 options), 120°F Default Factory Setting|
|Remote Control||With 9008172005 remote (max. distance 400’ from heater, non-polarized 18 gauge wiring.)|
• Residential Use: 15 yrs limited heat exchanger, 5 yrs limited parts
• Commercial Use: 10 yrs limited heat exchanger, 5 yrs limited parts