What sizes are available in the TFTN Series?

The NTI TFTN Series is available in a wide range of wall-mounted and floor-mounted models, with capacities ranging from approximately 85 MBH up to 850 MBH. This range allows the TFTN Series to support larger homes and more demanding heating systems.

What efficiency can homeowners expect?

Depending on the model, TFTN Series boilers offer up to 95–98% thermal efficiency. High-efficiency condensing operation helps reduce fuel consumption while maintaining consistent heating performance.

What type of heat exchanger does the TFTN Series use?

The TFTN Series features a stainless steel fire tube heat exchanger designed for efficient heat transfer, durability, and long service life. This proven design supports cleaner operation and reduced maintenance over time.

Is the TFTN Series suitable for multi-zone heating systems?

Yes. The TFTN Series includes built-in zone control, supporting multiple heating zones and domestic hot water. Additional zones can be added using optional expansion modules, making it well-suited for larger or more complex systems.

What installation configurations are available?

TFTN Series boilers offer flexible installation options, including top or bottom plumbing connections and both wall-mounted and floor-mounted configurations. This flexibility allows the system to adapt to a variety of mechanical room layouts.

What venting options are supported?

The TFTN Series supports direct vent installations with multiple venting configurations. Vent material, diameter, and allowable lengths vary by model and must follow manufacturer installation guidelines.

Can the TFTN Series be monitored remotely?

Yes. The TFTN Series supports remote monitoring and diagnostics through NTI’s connectivity platform, allowing for off-site system monitoring, troubleshooting, and service support when enabled.

How is proper sizing determined for a TFTN boiler?

Due to the wide capacity range, proper sizing is critical. The Boiler Shoppe performs professional heat loss calculations and system evaluations to ensure the selected TFTN model matches the home’s heating requirements.

NTI TFTN Series Boilers - The Boiler Shoppe

High-Efficiency Heating with the NTI TFTN Series

NTI TFTN Series Residential Heating Systems

The NTI TFTN Series is a high-efficiency condensing gas boiler designed to deliver reliable, consistent heating for residential homes.

Built with a durable stainless steel heat exchanger and advanced modulation technology, it adjusts its output based on demand to maintain comfort while reducing energy waste. Quiet operation and flexible installation options make it a practical replacement for aging boiler systems.

Even the best boiler performs at its best when it's properly selected, installed, and maintained. The Boiler Shoppe works closely with homeowners to ensure the TFTN Series is the right fit for their space, providing expert installation and ongoing service to protect efficiency, performance, and long-term comfort.

See If This Boiler Fits Your Home

Designed for Efficient, Everyday Performance

The TFTN Series integrates advanced controls and built-in safeguards to support efficient, adaptable residential heating systems.

Simple Setup and Programming

The TFTN Series includes an EZ Setup Wizard that streamlines initial configuration, making programming faster and more intuitive for technicians while reducing setup time during installation.

Remote Monitoring and Diagnostics

Built-in remote access allows for off-site monitoring and troubleshooting, helping identify issues early and minimize unnecessary service visits.

Clear, Full-Color Display

An easy-to-read full-color graphic interface provides clear system information at a glance, simplifying adjustments and ongoing system checks.

Flexible Installation Options

Top and bottom plumbing connections offer greater flexibility during installation, making the TFTN Series adaptable to a wide range of mechanical room layouts.

Built-In Low Water Cutoff

Integrated low water protection helps safeguard the boiler from damage, reducing the need for additional components and helping save on installation costs.

Integrated Zone Control

Its lightweight and zero clearance to combustibles design makes it an ideal choice for installations with limited space.

NTI TFTN Series Technical Specifications

Final specifications and model selection should be confirmed by a qualified technician based on the home’s heating requirements.

Have questions about the NTI Not sure if the NTI TFTN Series is the right fit for your home? We can walk you through your options, confirm proper sizing, and help you plan an installation.

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NTI BOILERS

NTI boilers offer high-efficiency heating solutions for homeowners upgrading older systems, combining durable construction, quiet operation, and modern controls for dependable comfort.

TFTN Series

The NTI TFTN Series is a high-efficiency condensing gas boiler engineered for consistent performance, quiet operation, and long-term reliability. Its advanced heat exchanger and smart controls help reduce energy use while maintaining steady comfort throughout the home. Designed with flexible installation options, the TFTN Series is well-suited for a wide range of residential heating applications.

Best for: homeowners replacing older boilers who want dependable, energy-efficient heating with modern controls and proven durability.

LEARN MORE / BROCHURE

FTVN Series II

The NTI FTVN Series II is a wall-mounted, high-efficiency condensing boiler designed to deliver reliable home heating with reduced energy consumption. Its compact footprint and modulating operation allow it to adapt to changing heating demands, improving comfort while minimizing fuel waste. With quiet performance and flexible venting options, it’s a practical upgrade for many homes.

Best for: homeowners looking for an efficient, space-saving boiler upgrade that offers steady comfort and lower operating costs.

LEARN MORE / BROCHURE

TRX Series

The NTI TRX Series is a premium residential boiler built for performance, efficiency, and durability. Featuring a stainless steel heat exchanger and advanced modulation technology, it delivers precise heating while maximizing energy savings. Its robust design and high turndown ratio make it ideal for homes with varying heating demands.

Best for: homeowners seeking a high-performance boiler with advanced efficiency and long-term reliability for heating systems.

BROCHURE

NTI Compass Series

The NTI Compass Series is a high-efficiency condensing boiler designed for reliable performance in a compact, wall-mounted form. Built with advanced modulation and a durable stainless steel heat exchanger, it delivers consistent heating while helping reduce energy consumption. Its flexible installation options and quiet operation make it a practical choice for modern homes.

Best for: homeowners upgrading older boilers who want efficient, space-saving heating with dependable long-term performance.