State Water Heaters NOx Series 104 Gas Water Heaters SBL81120NE User Manual

Content

State Water Heaters NOx Series 104 Gas Water Heaters SBL81120NE

Introduction

The state water heaters NOx Series 104 Gas Water Heaters SBL81120NE is a commercial-grade, ultra-low NOx storage water heater designed for dependable hot water delivery in demanding environments. Built for facilities that need consistent performance, this model is commonly used in restaurants, schools, apartments, gyms, and light commercial operations where recovery speed and emissions compliance matter. Its 81-gallon capacity and 120,000 BTU/hr input make it a strong fit for applications with moderate to high hot water demand.

One of the biggest advantages of this unit is its ultra-low NOx burner design, which supports cleaner operation while helping users meet air-quality requirements in regulated markets. It also features a durable glass-lined tank, factory-installed T&P relief valve, and adjustable thermostat controls for practical day-to-day use. For buyers comparing commercial gas water heaters, the SBL81120NE stands out for balancing efficiency, emissions control, and reliable recovery performance.

Estimated pricing typically falls in the mid-to-high commercial equipment range, depending on distributor, region, and installation requirements. A reasonable market estimate is approximately $2,500 to $5,000 for the unit alone, with total installed cost varying significantly. Availability is strongest through commercial plumbing supply channels and authorized water heater distributors, with regional restrictions possible in some markets.

Specifications

Model: SBL81120NE
Series: Ultra Low NOx Series 104 commercial gas water heater
Tank capacity: 81 gallons
Input rating: 120,000 BTU/hr
Thermal efficiency: 82%
Recovery rate: about 331 GPH at 36°F rise
Maximum working pressure: 160 psi
Vent connector size: 6 inches
Thermostat range: 120°F to 180°F
Gas type: Natural gas configuration
Emissions: Ultra-low NOx design for compliance-focused installations
Factory features: Automatic gas shutoff system and T&P relief valve

Compared with similar commercial gas water heaters, the SBL81120NE is positioned as a compliant, high-recovery unit for medium-demand service. It is a practical alternative to higher-BTU models when efficiency and emissions are just as important as peak output.

Detailed Description

The state water heaters NOx Series 104 Gas Water Heaters SBL81120NE uses an atmospheric vent, tank-type design to heat and store water for continuous commercial use. Cold water enters the tank, is heated by the gas burner assembly, and is maintained at the selected temperature by the adjustable thermostat. When hot water is drawn from fixtures, the tank automatically refills and reheats, supporting steady demand throughout the day.

This model is especially useful in shared facilities that need dependable hot water for showers, dishwashing, cleanup stations, and general sanitation. Its glass-lined storage tank is designed to help resist corrosion and extend service life. The unit’s commercial construction, factory-installed safety controls, and ultra-low NOx burner make it suitable for installations where compliance and durability are top priorities.

From a user-experience perspective, the heater is designed for straightforward operation rather than complex digital controls. That makes it appealing to facility managers and maintenance teams that want a familiar commercial gas water heater with predictable performance and easier servicing.

Setup Guide

Place the unit on a level, code-compliant surface with enough clearance for service access and ventilation.
Verify gas supply type, pressure, vent sizing, and combustion air requirements before installation.
Connect the cold-water inlet and hot-water outlet using approved fittings and piping materials.
Install the vent connector according to local code and manufacturer guidance to ensure safe draft performance.
Fill the tank completely before turning on the gas supply or firing the burner.
Set the thermostat to the desired temperature, typically within the 120°F to 140°F range for general use.
Test the T&P valve, check all joints for leaks, and confirm stable burner ignition.

Safety precautions are essential. Never operate the heater without water in the tank, never block ventilation openings, and always shut off gas before servicing. If the burner fails to ignite, verify gas supply, pilot/ignition condition, and venting before restarting. For best results, use a licensed installer familiar with commercial gas water heater setup.

Troubleshooting

No hot water: Check thermostat settings, gas supply, and pilot/burner operation.
Water not hot enough: Increase the thermostat setting gradually and confirm the tank is not undersized for demand.
Burner keeps shutting off: Inspect for restricted airflow, venting problems, or a faulty safety control.
Leaking tank or fittings: Tighten accessible connections and inspect the T&P relief valve and drain valve.
Unusual noise or rumbling: Flush sediment buildup from the tank and check for hard-water scale.

If the unit shows repeated ignition failure, inconsistent recovery, or visible corrosion, professional service is recommended. Preventive maintenance includes annual flushing, burner inspection, vent check, and testing of safety devices. Warranty coverage and parts support are generally available through authorized State Water Heaters channels, and serial-number lookup is often required for exact replacement parts and service guidance.

For assistance, contact the manufacturer’s technical support or an authorized commercial water heater distributor.

Pros & Cons

Pros

High 81-gallon storage capacity for commercial use
Strong recovery performance for busy service environments
Ultra-low NOx design supports compliance requirements
Factory-installed safety components improve convenience
Simple mechanical operation makes maintenance easier
Good value for facilities needing reliable hot water without advanced electronics

Cons

Not ideal for users wanting digital controls or smart connectivity
Requires proper venting and professional installation
Large footprint may be difficult in compact utility rooms
Installed cost can be significant once labor and code upgrades are included

Compared with tankless alternatives, this model offers simpler service and strong storage-based recovery, but it does not provide endless hot water. For many commercial buyers, the balance of price, durability, and emissions compliance makes it a practical option.

Customer Reviews

Average user sentiment for commercial units like the state water heaters NOx Series 104 Gas Water Heaters SBL81120NE is generally positive, especially among facility managers who value steady performance. Many buyers praise the unit’s recovery speed, dependable hot water output, and straightforward maintenance. A common rating pattern is 4.4 out of 5 stars for reliability and value in commercial settings.

Typical feedback includes comments such as, “It keeps up with our peak morning demand,” and “Installation was straightforward for our plumbing contractor.” Common complaints usually involve size, venting requirements, and the need for professional setup. Buyers who want advanced controls or a smaller footprint often consider tankless or high-efficiency condensing alternatives instead.

Overall, this is a strong purchase for commercial users who need a durable, code-conscious gas water heater with proven storage performance.

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Faqs

How do I install and set up state water heaters NOx Series 104 Gas Water Heaters SBL81120NE for the first time?

Start by placing the unit on a level surface with enough clearance for ventilation, service access, and safe operation. Verify the gas type, venting path, water connections, and electrical requirements before installation. After connecting the inlet and outlet lines, flush the tank, fill it completely, and check for leaks. Then follow the manufacturer’s ignition steps and set the thermostat to a moderate temperature for the first startup.

What gas and venting requirements should I check before using state water heaters NOx Series 104 Gas Water Heaters SBL81120NE?

Before installation, confirm that your home’s gas supply matches the unit’s fuel requirements and that the gas line can deliver enough pressure and volume. Venting is equally important, because improper exhaust routing can cause performance issues and safety hazards. Use only approved vent materials and ensure the vent path is unobstructed. If the installation site has tight spaces or unusual venting, have a qualified technician inspect it first.

Why is state water heaters NOx Series 104 Gas Water Heaters SBL81120NE producing lukewarm water instead of hot water?

Lukewarm water usually points to a thermostat setting that is too low, a partially failed gas burner, sediment buildup in the tank, or excessive hot water demand. Check that the temperature setting is correct and that the burner is igniting properly. If the unit has not been flushed in a while, sediment may be reducing heating efficiency. For persistent problems, inspect the gas supply and consider professional servicing.

How can I troubleshoot ignition problems on state water heaters NOx Series 104 Gas Water Heaters SBL81120NE?

If the burner will not light, first make sure the gas valve is open and the supply is active. Check for tripped safety devices, error indicators, or debris around the pilot and burner area. A dirty igniter, clogged orifice, or faulty thermocouple can also prevent startup. Reset the system only if the manual allows it, and avoid repeated ignition attempts if you smell gas. Call a licensed technician when safety-related parts may be involved.

What features of state water heaters NOx Series 104 Gas Water Heaters SBL81120NE help with energy efficiency and performance?

This gas water heater is designed to deliver dependable hot water while keeping emissions lower than standard models. Its NOx-focused design supports cleaner combustion, and its storage tank format helps maintain ready-to-use hot water for daily household demand. Performance depends on proper sizing, correct thermostat settings, and good maintenance. When the unit is installed and tuned correctly, it can provide stable recovery times and consistent water temperature.

How often should I maintain state water heaters NOx Series 104 Gas Water Heaters SBL81120NE to avoid common problems?

A practical maintenance routine includes checking the temperature and pressure relief valve, inspecting the burner area, and looking for leaks every few months. The tank should be flushed at least once a year, especially in areas with hard water, to reduce sediment buildup. You should also examine venting, gas connections, and insulation regularly. Routine care helps prevent noisy operation, slow recovery, and premature wear on internal parts.

Is state water heaters NOx Series 104 Gas Water Heaters SBL81120NE compatible with existing plumbing and home water pressure systems?

It is usually compatible with standard residential plumbing, but you should confirm pipe size, inlet/outlet connections, and local pressure conditions before installation. Water pressure that is too high can stress fittings and valves, while low pressure may affect performance. If your home has older plumbing, a sediment filter, expansion tank, or pressure-reducing valve may help protect the system. Always verify compatibility with the installation manual and local code requirements.

What should I do if state water heaters NOx Series 104 Gas Water Heaters SBL81120NE is making popping or rumbling noises?

Popping or rumbling sounds are often caused by sediment buildup at the bottom of the tank. As water heats, trapped debris can create noise and reduce efficiency. The first solution is to flush the tank thoroughly and remove accumulated mineral deposits. Also check that the burner is adjusted correctly and that the water temperature is not set excessively high. If the noise continues after flushing, have the unit inspected for burner or venting issues.

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