Noritz EZTR Pro Bundle Tankless Water Heaters Buying Guide

Replacing a traditional tank water heater with a tankless model can improve efficiency, free up floor space, and provide a continuous supply of hot water. The installation, however, is not always as simple as removing one unit and hanging another on the wall. Water connections, venting, gas piping, service valves, and other components all must work together.

Noritz EZTR bundles are designed to make that transition easy. Instead of purchasing the water heater and several major installation components separately, each package combines a tankless unit with accessories selected for common tank-replacement projects.

This guide explains how the Noritz EZTR40, EZTR50, and EZTR75 bundles compare, what comes with each package, and how to determine which one can support your home.

What Is a Noritz EZTR Tankless Water Heater Bundle?

A Noritz EZTR bundle is an all-in-one residential package created for replacing a traditional gas storage tank with a tankless water heater.

A storage water heater keeps a fixed amount of water hot until it is needed. Once that supply is used, the tank must refill and reheat. A tankless water heater heats water as it moves through the unit, allowing it to continue supplying hot water if the home's demand stays within its available output.

The EZTR design also addresses some common replacement challenges. Water connections are positioned at the top of the unit, like the connections on many storage tanks. In a compatible installation, this may help an installer reconnect existing overhead plumbing with less rerouting.

The tankless unit mounts to the wall after the old tank is removed. That opens the floor area previously occupied by a 40-, 50-, or 75-gallon tank, providing more room for storage, shelving, or future service. The bundle itself also includes key plumbing and venting components for the intended installation.

Why Choose an EZTR Tankless Water Heater Bundle Instead of Buying a Water Heater Separately?

An EZTR bundle is a practical choice when you want to replace an existing gas tank water heater while reducing the number of installation components that must be selected separately.

The primary benefits include:

• Coordinated Components: The heater, venting pieces, and service valves are packaged for a specific type of replacement project.
• Top-Mounted Connections: The hot and cold-water connections may align more easily with plumbing located above an existing tank.
• Existing Vent-Path Compatibility: Approved flexible venting can be routed through certain existing round 3- or 4-inch B-vent pathways.
• Continuous Hot Water: A properly sized system heats water as needed without relying on a limited stored supply.
• More Floor Space: The wall-mounted cabinet removes the large tank from the basement, garage, or utility room floor.
• Easier Maintenance Access: Service or isolation valves allow the heater to be flushed without shutting off water throughout the entire home.

The installer must still verify the home's compatibility, but the bundle provides a more organized starting point.

Which Noritz EZTR Bundle Is Right for Your Home?

The EZTR40, EZTR50, and EZTR75 have different output, efficiency, installation, control, and warranty specifications.

These GPM figures are maximum ratings. The actual flow available to your home depends on how much the heater must raise the incoming water temperature.

• Noritz EZTR40 Tankless Water Heater: The EZTR40 is designed for smaller homes replacing a 40-gallon gas tank. It is best suited to lighter simultaneous demand, such as one shower running with a sink or another low-flow fixture. Because output decreases as temperature rise increases, confirm that it can meet your household's winter hot water demand before selecting it.
• Noritz EZTR50 Tankless Water Heater: The EZTR50 is designed for many medium-sized households replacing a 50-gallon gas tank. It can support more overlapping hot water use than the EZTR40, such as two showers or a shower and an appliance, depending on incoming water temperature and the home's calculated demand.
• Noritz EZTR75 Tankless Water Heater: The EZTR75 is the highest-capacity bundle and is designed for larger households, colder climates, and homes where several hot water fixtures may run at once. It is a strong choice for replacing a 75-gallon gas tank, but its output should still be checked against the home's winter temperature rise and peak demand.

What Comes with a Noritz EZTR Bundle?

The EZTR bundles include the heater and key components selected for their intended replacement configurations.

EZTR50 and EZTR75 Bundle Components

The EZTR50 and EZTR75 include components for a compatible 25-foot flexible vent installation. The package contains:

• Tankless Water Heater: The EZTR50 contains the EZ98 Pro, while the EZTR75 contains the EZ111 Pro.
• Isolation Valves and Pressure Relief Valve: These provide shutoff and service access for flushing, descaling, and maintenance.
• Flex Vent Conversion Kit: The kit adapts the heater for the included 2-inch flexible vent arrangement.
• Flex Feeder: This helps guide the flexible vent through the approved existing vent path.
• Base Junction Support and Adapter: These pieces support and connect the vent near the water heater.
• Top Flex Support and Rain Cap: These secure and terminate the upper portion of the vent system.
• Aluminum Flex Sleeve: The sleeve supports the transition within the vent assembly.
• Twenty-Five Feet of Polypropylene Vent: The included flexible vent carries exhaust through the compatible route.
• Startup Guide: The package includes information for setup and initial operation.

These components cover important parts of the planned installation, but additional plumbing, gas, electrical, drainage, venting, mounting, or code-required materials may still be needed.

EZTR40 Bundle Components

The EZTR40 includes the water heater, its vent kit, and service valves.

It uses a different heater platform and a more specific indoor 2-inch flex vent arrangement. Accessories approved for the EZTR50 or EZTR75 should not automatically be assumed compatible with the EZTR40.

A professional installer should verify the exact package contents, existing vent path, and all required installation materials before removing the old tank.

How Do You Size a Noritz EZTR Bundle?

Step 1: Calculate Temperature Rise

A Noritz EZTR bundle should be sized according to temperature rise and peak simultaneous flow.

Temperature rise is the difference between the cold water entering the home and the hot water temperature selected at the heater.

Use this formula:

• Desired hot water temperature − incoming water temperature = temperature rise

For example:

• 120°F − 50°F = 70°F temperature rise

The colder the incoming water, the more heat the unit must add to each gallon. As the required rise increases, the available GPM decreases.

A Noritz groundwater-temperature map can provide a preliminary estimate. Winter water temperatures may be around 35°F to 40°F in colder northern regions, 45°F to 50°F in many central and coastal regions, 55°F to 60°F in warmer areas, and 65°F to 70°F in the warmest southern regions.

Because local water sources and weather vary, measuring the actual cold-water temperature during winter provides a better sizing number.

Step 2: Calculate Peak Hot Water Demand

Peak demand is the amount of hot water the household is likely to use at one time during its busiest period.

Approximate flow rates include:

• Shower: 2.0 GPM
• Bathroom Sink: 1.0 GPM
• Kitchen Sink: 1.5 GPM
• Dishwasher: 2.0 GPM
• Washing Machine: 2.0 GPM

Actual fixture flow rates may differ, especially with rain showerheads, body sprays, large tub fillers, or older plumbing fixtures.

For example, two showers and a washing machine may require:

• 2.0 GPM + 2.0 GPM + 2.0 GPM = 6.0 GPM

You do not need to add every fixture in the house. Use a realistic combination based on what normally runs together during busy mornings or evenings.

Step 3: Compare Demand With the Available Flow

Once you know the temperature rise and peak demand, compare those figures with the model's temperature-rise chart.

For the Pro bundles:

Noritz EZTR Bundle Temperature-Rise Chart

Suppose a home has 55°F incoming water, a 120°F outlet setting, and a 6.0-GPM peak demand:

• 120°F − 55°F = 65°F temperature rise

At a 65°F rise, the EZTR40 provides approximately 3.4 GPM, the EZTR50 provides 5.3 GPM, and the EZTR75 provides 6.0 GPM. Under these conditions, the EZTR75 is the only bundle that matches the estimated peak demand. You can use Noritz's Sizing Calculator to get started on sizing.

A professional should still confirm fixture flow rates and installation requirements before the final selection.

What Installation Requirements Should You Consider?

Installation Requirements

An EZTR bundle simplifies component selection, but it still requires professional installation.

An installer should evaluate the following:

• Venting: The existing round 3- or 4-inch B-vent must be suitable for the approved flexible vent configuration. Length, condition, bends, supports, and termination all matter.
• Gas Supply: The gas meter, regulator, pipe diameter, pipe length, and total appliance load must support up to 120,000, 180,000, or 199,900 BTU/h, depending on the model.
• Condensate Drainage: The condensing EZTR50 and EZTR75 require properly routed condensate drainage. A neutralizer or pump may also be needed.
• Electrical Power: Tankless controls and ignition require an appropriate 120-volt electrical supply.
• Water Quality: Hard water can increase mineral buildup and may require more frequent descaling or water treatment.
• Local Codes: Clearances, permits, combustion-air requirements, drainage, and vent terminations must meet local regulations.

A pre-installation inspection helps identify additional work before the existing water heater is removed.

What Maintenance Do EZTR Tankless Water Heater Bundles Need?

Regular maintenance helps protect the heater's flow rate, efficiency, and long-term performance.

Typical maintenance includes flushing or descaling the heat exchanger, cleaning the inlet filter, inspecting the vent system, checking the condensate drain, and examining gas and water connections. Hard-water homes may require more frequent flushing.

The included isolation or service valves make maintenance easier by allowing the heater to be separated from the rest of the plumbing system. A technician can then circulate descaling solution through the unit without shutting off water to the entire home.

What Maintenance and Warranty Coverage Do EZTR Bundles Include?

Warranty coverage differs by model. The EZTR40 includes qualifying coverage of 12 years on the heat exchanger, five years on parts, and one year of reasonable labor. The EZTR50 and EZTR75 include qualifying coverage of 25 years on the heat exchanger, five years on parts, and one year of reasonable labor.

Which Noritz EZTR Bundle Should You Choose?

The best EZTR bundle is the model that meets your winter hot water demand and fits the existing installation.

Use these general guidelines:

• Choose the EZTR40 for a smaller household with lighter simultaneous demand and a compatible indoor flex-vent installation.
• Choose the EZTR50 for a medium-sized household that may operate two or more hot water fixtures together.
• Choose the EZTR75 for a larger family, colder climate, higher-flow fixtures, or frequent overlapping shower and appliance use.

These recommendations provide a starting point, but the final decision should come from the temperature-rise calculation, fixture demand, vent route, and gas-supply evaluation.

Shop Noritz EZTR Bundles at HVACDirect.com

Noritz EZTR bundles provide a practical way to move from a traditional gas tank to efficient, on-demand water heating.

The EZTR40 covers lighter 40-gallon replacement applications. The EZTR50 adds the higher efficiency and updated controls of the EZ98 Pro, while the EZTR75 provides the lineup's greatest output through the EZ111 Pro.

HVACDirect.com offers the full range of Noritz EZTR bundles, compatible accessories, competitive wholesale pricing, and HVAC-expert customer service to help you compare the complete installation.

Noritz EZTR Tankless Water Heater Bundle Frequently Asked Questions

Can a Noritz EZTR bundle provide endless hot water?

A properly sized EZTR unit can continue heating water without a tank recovery period. However, "endless" does not mean unlimited flow. If household demand exceeds the unit's available GPM at the required temperature rise, the water temperature or fixture flow may not meet expectations.

Do all three bundles include Bluetooth controls?

No. Bluetooth compatibility applies to the EZTR50 and EZTR75 Pro models. The EZTR40 does not include the same Bluetooth-enabled Pro control platform.

Can the EZTR bundles be installed outdoors?

The EZTR50 and EZTR75 are based on convertible indoor/outdoor Pro models and may be installed outdoors with the correct approved configuration and accessories. The EZTR40 bundle is intended for indoor installation.

Does the bundle include everything the installer will need?

It includes the heater and key components for the intended tank-replacement configuration. Additional materials may still be required for gas piping, water piping, electrical work, condensate drainage, mounting, vent changes, permits, or local code compliance.

Why is the actual GPM lower in colder climates?

The water heater has to add more heat to colder incoming water. As the temperature rise increases, fewer gallons can be heated to the desired outlet temperature each minute.

Can I choose a model based on the number of bathrooms?

Bathroom count is a useful starting point, but it is not enough for final sizing. A two-bathroom house with high-flow showers may require more capacity than a three-bathroom home where fixtures rarely operate together.