11 Gallon Water Heater

The Best 11 Gallon Water Heater

Here are some of the best 11 Gallon Water Heaters on The Trade Table:

Rinnai RSC199eP SE+ Series with Smart-Circ™ 11 GPM 199,000 BTU Propane Gas Outdoor Condensing Tankless Water Heater with Recirculation

The Rinnai RSC199eP SE+ Series Outdoor Tankless Water Heater delivers up to 11 GPM of hot water, making it a powerful solution for homes with 3 to 6 bathrooms or small commercial needs. Fueled by propane and equipped with Smart-Circ™ Intelligent Recirculation™, it learns your hot water habits to reduce wait time and energy use. This condensing unit features dual stainless steel heat exchangers, a compact weather-ready design, and a 0.93 Uniform Energy Factor for top-tier performance and efficiency.

Rinnai SE+ Series with Smart-Circ™ 11 GPM Indoor Condensing Natural Gas Tankless Water Heater with Recirculation

The Rinnai SE+ Series 11 GPM Indoor Condensing Tankless Water Heater with Smart-Circ™ technology offers powerful performance for homes with 3 to 6 bathrooms. Fueled by natural gas, it delivers up to 199,000 BTUs and features advanced recirculation with Smart-Circ™, which learns your hot water usage patterns for improved efficiency and faster delivery. Its compact, silver indoor design includes dual stainless steel heat exchangers, built-in recirculation pump, and supports flow rates from 0.26 to 11 GPM with a 0.93 Uniform Energy Factor.

Frequently Asked Questions About The 11 Gallon Water Heater

Here are some Frequently Asked Questions about the 11 Gallon Water Heater:

What Is An 11 Gallon Water Heater Used For?

An 11 Gallon Water Heater is designed for small spaces or specific-use areas that don’t need a full-size tank. It works great in tiny homes, offices, cabins, or as a backup unit. The compact size makes it easy to fit under sinks or in utility closets. It delivers hot water quickly and reliably for sinks, short showers, or light daily use.

How Big Is An 11 Gallon Water Heater?

Most 11 Gallon Water Heaters measure around 26 inches tall and 17 inches wide, though this can vary slightly. They are compact enough to fit in tight or concealed spaces. The small footprint is one of the reasons they’re popular in places with limited room. Always check the product specifications for exact sizing.

Is The 11 Gallon Water Heater Suitable For Small Apartments?

Yes, the 11 Gallon Water Heater is often used in small apartments where space and hot water demand are limited. It’s ideal for one person or light water usage situations. It can handle daily handwashing, dishwashing, and occasional showers. For larger households, a bigger tank would be more practical.

What Voltage Is Required For An 11 Gallon Water Heater?

Most 11 Gallon Water Heaters use either 120V or 240V, depending on the model. You’ll need to match your home’s electrical setup with the unit’s requirements. Check the label or manual for the correct voltage. Installing the wrong voltage can damage the unit or reduce its efficiency.

How Much Hot Water Can I Get From An 11 Gallon Water Heater?

An 11 Gallon Water Heater provides about 11 gallons of hot water per heating cycle. This is usually enough for a short shower or several handwashing and dishwashing sessions. It may not support multiple tasks at once. Recovery time can vary depending on wattage and usage.

Can I Install An 11 Gallon Water Heater Under A Sink?

Yes, many models are designed specifically for under-sink installation. Their compact design fits well in cabinets or utility spaces. Make sure there's enough clearance and access for plumbing connections. It’s a good option for small bathrooms or kitchenettes.

Does The 11 Gallon Water Heater Need To Be Wall-Mounted?

Not always—some models are freestanding while others can be wall-mounted. Wall mounting saves floor space and keeps the unit out of the way. Be sure the wall can support the weight when full. Always follow the manufacturer’s mounting instructions.

Can The 11 Gallon Water Heater Be Installed Horizontally?

Some 11 Gallon Water Heaters allow horizontal installation, but not all do. You’ll need to check the specific model’s manual. Installing it incorrectly can affect performance or cause safety issues. If horizontal mounting is important, look for models made for that.

What Kind Of Space Is Best For An 11 Gallon Water Heater?

Small utility rooms, cabinets, or under-sink areas are best for an 11 Gallon Water Heater. Look for a dry, accessible space near your plumbing lines. It should be easy to reach for maintenance or servicing. Ventilation is also important to keep the unit cool and safe.

Do I Need A Professional To Install An 11 Gallon Water Heater?

Hiring a professional is recommended, especially for electrical and plumbing safety. A licensed installer will make sure it's set up to code. It also helps prevent voiding the warranty. If you're experienced with electrical and plumbing work, you might handle it yourself with care.

How Long Does It Take For An 11 Gallon Water Heater To Heat Water?

It usually takes 20 to 40 minutes to heat a full tank, depending on the power input. Higher wattage heaters heat faster. Water temperature rise also depends on the starting temperature of your water supply. Refer to the product manual for more precise heating time.

Does An 11 Gallon Water Heater Have Adjustable Temperature Settings?

Yes, most models come with adjustable thermostats. You can usually set the temperature between 90°F and 150°F. This lets you customize the heat level based on your needs. Just make sure not to set it too high to avoid burns.

Can An 11 Gallon Water Heater Be Used With A Solar Power System?

Yes, many units can be integrated into solar setups with the right equipment. You might need an inverter or a solar-compatible controller. Always verify with your solar provider if the model fits. Using solar can lower your electric bill and environmental impact.

Is There A Thermostat In An 11 Gallon Water Heater?

Yes, it includes a built-in thermostat that regulates the temperature. The thermostat maintains your selected heat level automatically. If the water gets too cool, it triggers the heating element to turn on. Most also have safety shut-offs to prevent overheating.

How Does The 11 Gallon Water Heater Maintain Temperature?

Once heated, the tank keeps water warm using insulation and thermostat control. The heater cycles on when the temperature drops below the set point. Good insulation helps reduce energy use. This keeps water ready without running constantly.

Is An 11 Gallon Water Heater Energy Efficient?

Yes, especially models with good insulation and smart thermostats. They use energy only when heating, and the smaller size means less overall power is needed. Energy efficiency ratings vary, so look for Energy Star labels when available. Proper installation also boosts efficiency.

How Much Electricity Does An 11 Gallon Water Heater Consume?

Usage depends on wattage and how often it heats up. Most models use between 1.5 to 3 kWh per cycle. If used daily, it can average about 45–90 kWh per month. Keeping it insulated and maintained helps keep costs down.

Can I Use An 11 Gallon Water Heater Off-Grid?

Yes, it’s possible with the right power source like solar or battery systems. You’ll need enough power capacity and possibly an inverter. Some models are better suited for off-grid use than others. Always check compatibility with your off-grid setup.

What Energy-Saving Features Does An 11 Gallon Water Heater Have?

Common features include thick insulation, auto shut-off, and energy-efficient heating elements. Some models also include digital thermostats or vacation modes. These features help reduce power use when hot water isn’t needed. The smaller tank also naturally uses less energy.

Does An 11 Gallon Water Heater Qualify For Energy Rebates?

Some models do if they meet energy efficiency standards. It depends on local or state energy rebate programs. Check with your utility provider or government site for eligibility. Energy Star certified units are more likely to qualify.

How Do I Flush An 11 Gallon Water Heater?

Turn off the power and cold water supply first. Connect a hose to the drain valve and let the water run into a bucket or drain. Flushing helps remove sediment from the tank. Doing this once or twice a year extends its life.

Why Is My 11 Gallon Water Heater Not Heating Properly?

It could be a thermostat, heating element, or electrical issue. Check the breaker and temperature setting first. Sediment buildup can also block heat transfer. If you're unsure, it’s best to call a professional.

How Often Should I Service My 11 Gallon Water Heater?

Yearly maintenance is a good practice. This includes checking the anode rod, flushing the tank, and inspecting connections. Regular service helps catch problems early. It also helps your heater last longer and run more efficiently.

Can I Replace The Heating Element In My 11 Gallon Water Heater?

Yes, the heating element is usually replaceable. Make sure to buy the correct part for your model. Turn off the power and follow the manufacturer’s instructions. If unsure, a technician can safely handle the job.

What Should I Do If My 11 Gallon Water Heater Leaks?

Turn off the power and water supply right away. Look for leaks at the connections, tank, or drain valve. Small leaks might just need tightening, but a damaged tank may need replacing. Call a plumber if you’re not sure where it’s coming from.

How Safe Is An 11 Gallon Water Heater?

They’re generally very safe when installed and used properly. Most come with built-in safety features like pressure relief valves and overheating protection. Following manufacturer guidelines helps prevent risks. Regular checks also improve safety.

What Safety Features Are Built Into An 11 Gallon Water Heater?

Common features include temperature and pressure relief valves, auto shut-off, and thermostat controls. These prevent overheating or pressure buildup. Some models also offer dry-fire protection. These features work together to keep operation safe.

How Long Does An 11 Gallon Water Heater Typically Last?

With good care, most last between 8 to 12 years. Regular flushing and maintenance help prevent issues. Hard water can shorten the lifespan due to mineral buildup. Keeping an eye on performance helps you spot when it’s time to replace it.

Can An 11 Gallon Water Heater Overheat?

Yes, but most models have safeguards to prevent it. If the thermostat fails or there's an electrical issue, overheating can happen. Pressure relief valves help release extra heat or pressure. Always turn off the unit if it feels abnormally hot.

Is It Safe To Leave The 11 Gallon Water Heater On All The Time?

Yes, it's designed to be left on. It heats only when needed and maintains the set temperature. Leaving it on won’t waste much energy if it's insulated well. Just turn it off if you're leaving for an extended time.

Where To Buy A 11 Gallon Water Heater?

You can buy a 11 Gallon Water Heater at The Trade Table.