NTI TFTN399
The NTI TFTN399 is a Up to 95% AFUE heating only boiler with a 399,000 BTU/hr BTU output, part of the NTI TFTN (Trinity Fire Tube) line. GasBoilers.ca installs, repairs, and maintains the TFTN399 across Greater Vancouver — Red Seal–certified, TSBC-licensed, same-day repair available. Call 604-359-1081.
NTI TFTN399 overview
The TFTN, or Trinity Fire Tube, is NTI's heating-only condensing boiler line spanning residential through light-commercial loads up to 399,000 BTU/hr. It uses a stainless-steel fire-tube heat exchanger with flexible venting up to 150 feet and a limited-lifetime heat-exchanger warranty.
Up to 95% AFUE
Efficiency
399,000 BTU/hr
BTU Output
Up to 15 years
Warranty
TFTN399 specifications
| Model | NTI TFTN399 |
| Series | TFTN (Trinity Fire Tube) |
| Type | heating only |
| BTU Output | 399,000 BTU/hr |
| Efficiency | Up to 95% AFUE |
| Warranty | Up to 15 years |
| Origin | Canada |
| Best for | Light-commercial loads |
TFTN (Trinity Fire Tube) features
NTI TFTN399 services we provide
All work by licensed BC gas-fitters — TSBC-certified.
TFTN399 Installation
Permit, sizing, venting, gas, commissioning.
From $6,500
TFTN399 Repair
Error code diagnosis, parts, full repair.
From $189
TFTN399 Maintenance
Annual tune-up — required for warranty.
From $169
TFTN399 Replacement
Upgrade an older unit. Rebate-eligible.
From $6,500
Emergency Service
Same-day no-heat, leak, CO, gas-smell response.
Call 604-359-1081
Warranty Service
Authorized warranty repairs for NTI.
Warranty-covered
NTI TFTN399 — frequently asked questions
How much does NTI TFTN399 installation cost in Vancouver?
NTI TFTN399 installation starts from $6,500 in Greater Vancouver, including permit, code-compliant venting and gas piping, removal of the old unit, and full commissioning. Final pricing depends on your existing system and a heat-loss calculation. Call 604-359-1081 for a free quote.
What size is the NTI TFTN399?
The NTI TFTN399 has a heating output of 399,000 BTU/hr BTU, with Up to 95% AFUE efficiency. It is best suited to light-commercial loads.
Do you repair the NTI TFTN399?
Yes. We diagnose and repair the NTI TFTN399 — error codes, ignition faults, no-heat, leaks, low pressure, and sensor issues — from $189. Our technicians are factory-trained on NTI TFTN (Trinity Fire Tube) units and carry common parts on the truck.
How often should the NTI TFTN399 be serviced?
NTI recommends annual maintenance to keep the TFTN399 efficient, safe, and within warranty (up to up to 15 years). Our maintenance service starts from $169.
NTI TFTN399 service across Greater Vancouver
We service the TFTN399 in every major Greater Vancouver city.
Other NTI TFTN (Trinity Fire Tube) Models
Book NTI TFTN399 service today
Same-day repair available · Free installation quotes · Licensed gas-fitters