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Main product image of Instinct Combi 155 142,000 BTU Output Direct Vent Hot Water Gas Boiler (NG/LP)
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Instinct Combi 155 142,000 BTU Output Direct Vent Hot Water Gas Boiler (NG/LP)

SKU:
INS155C
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Instinct Combi 155 142,000 BTU Output Direct Vent Hot Water Gas Boiler (NG/LP)
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INS155C has been discontinued
Discontinued November 8, 2025
This product was discontinued by the manufacturer.
BTU Input: 
155000
Application: 
Combi Heating/Hot Water

MANUALS (5)

Warranty

Schematic Feature!
Replacement Parts

Product Highlights

–
Product Highlight: BTU Output
142000 Max BTUs
Product Highlight: Fuel Type
Natural Gas
Product Highlight: Vent Type
Direct Vent
Product Highlight: System Type
Hydronic (Water)
Product Highlight: Width (Inches)
24.7" Width
Product Highlight: Supply Size
1"

Description

–
Heating equipment must be installed, commissioned, and serviced by a licensed and qualified professional in accordance with manufacturer instructions, applicable codes, and industry standards. Manufacturers do not accept warranty or technical support requests from homeowners or unlicensed individuals. All warranty and technical inquiries must be initiated by the licensed professional responsible for the installation.

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.



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.

Specs

–
System Type:

Hydronic (Water)

Features:

Direct Vent

Condensing

Wall Mounted

BTU Output:

142000

Width (Inches):

24.7"

Product Type:

Boiler

Efficiency:

95%

IBR Rating:

123000

Gas Connection:

3/4"

Supply Size:

1"

DOE Rating:

142000

BTU Input:

155000

Fuel Type:

Natural Gas

Return Size:

1"

Vent Type:

Direct Vent

Height (Inches):

33"

Application:

Combi Heating/Hot Water

Help Face

Questions?

Speak with a real person who will go out of the way to help!
Call or text 888-757-4774
Monday – Thursday
8am–7:45pm
Friday
9am–7:45pm
Saturday – Sunday
9am–5:45pm


Box

Excellence 110

Replacement Parts

SKU: INS155C

Brand: Triangle Tube

Search Parts:
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Front Jacket Panel
INSJKT04
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Control Box Mounting Bracket
INSRKIT92
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Left Side Jacket Panel
INSJKT05
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Wall Mounting Bracket with Hardware
INSRKIT90
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Right Side Jacket Panel
INSJKT06
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User Interface Mounting Bracket
INSRKIT91
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