The Triangle Tube brand has been discontinued by the manufacturer as of 11/3/2025. Suggested replacement units will be available on our website and replacement parts will continue to be available as supplies last. If you'd like any further assistance, please contact our customer service team.
Rebates:
This product qualifies for a federal tax rebate of up to $600. Federal Rebate click for more info
In addition to the federal rebate, you may also be eligible for rebates from your local utility company and state. Search your region and state in the link below for information about local rebate programs that may apply to you.
Triangle Tube Rebate Center
The Instinct features an all stainless steel fire tube heat exchanger. Combi sizes are available in 155 and 199 MBH. CTRLMAX Control System-EZ Setup allows for a quick :60 second setup. Easy troubleshooting in plain text, no codes. 3-in-1 Universal vent adapter directly accepts PVC, Polypropylene stainless steel. The large plate heat exchanger provides industry leading performance. 5+ GPM hot water while fully condensing in DHW mode.
| Fuel Type: | Natural Gas |
|---|---|
| Efficiency: | 95% |
| System Type: | Water |
| Gas Connection: | 3/4" |
| Features: | Combo DHW |
| BTU Input: | 199000 |

Replacement Parts
SKU: INS199C
Brand: Triangle Tube