NTI TFT340 BoilerNTI Gas Boiler TFT399 Min 79,800BTU/hr Max 399,000BTU/hr
In Stock
Custom Pricing Available
+ Turnkey installation *
Order nowInstallation/replacement covers all necessary materials for operation
A few steps and a new Boiler NTI TFT399 in your house
Technical Characteristics of NTI TFT399 Boiler
- Input power, NG
- 39.9 – 399 MBH
- Input power, LP
- 39.9 – 399 MBH
- AFUE
- 95.4%
- Heating capacity
- 380 MBH
- Net AHRI rating
- 330 MBH
- Installation type
- Indoor Wall Hung
- Weight
- 247 lb
- Gas connection
- 3⁄4 in NPT male
- Water connection
- 11⁄2 in NPT male
- Air inlet
- 4 in (max 100 ft)
- Flue
- 4 in (max 100 ft)

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NTI TFT399 Boiler Manual
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Boiler NTI TFT399 Reviews
- Evelyn Roy January 4, 2024
(0 reply) - Zachary Phillips September 29, 2023
(0 reply)
4 of 2 ReviewsMy boiler is a reliable helper during the long Canadian winters. I don’t know what I would do without it.
I purchased a boiler along with installation services and the result has pleasantly surprised me. The boiler works quietly and efficiently, heating our house without interruptions. The installation team made an excellent impression – they quickly and efficiently installed the equipment without leaving a single trace after their work. I am grateful to them for their professionalism and careful approach to the task. Now we not only have a reliable boiler, but also confidence that it is installed correctly.