Triangle Tube

Hydronic Heating Equipmenttriangletube.com

Triangle Tube manufactured stainless steel condensing boilers, indirect and direct-fired water heaters, and heat exchangers for residential and light commercial hydronic heating applications across North America. Founded in 1946 and owned by Groupe Atlantic, the company ceased operations on November 3, 2025.

Company typePrivate
Founded1946
HeadquartersGloucester City, United States
Headcount11–50
GTM typeB2B
OfferingHardware or Manufacturing

What Triangle Tube does

Triangle Tube is a Gloucester City / West Deptford, New Jersey-based manufacturer of stainless steel hydronic heating and water heating equipment serving residential and light commercial customers across North America. The company was founded in 1946, was the first to bring the fire tube heat exchanger to the residential market in 2004, and operated as a subsidiary of French conglomerate Groupe Atlantic, which acquired the company and leveraged its Ideal Boiler UK manufacturing platform that produces over 400,000 units annually. Its product portfolio spans condensing boilers (Instinct, Prestige, Ionic, Keystone lines), indirect and direct-fired water heaters (Smart 316, Cardinal, Ionic Volume, Keystone), and heat exchangers for pool/spa applications (Maxi-Flo, Brazed Plate, Plate and Frame), with modulating controls offering turndown ratios up to 5.5:1 and thermal efficiency of 95-97% on flagship lines. The company also offered a Wi-Fi monitoring accessory (Tsync) and a tiered Good/Better/Best warranty program tied to contractor registration and site commissioning practices.

Triangle Tube generated revenue through unit hardware sales to a B2B channel of stocking distributors and HVAC/plumbing contractors across the US and Canada, supported by regional territory sales managers, field technical support staff, and a dedicated Expert Academy training facility with a live fire lab in West Deptford. The go-to-market was channel-led with content marketing, AHR Expo participation, and contractor enablement programs (Share-N-Install, Find a Contractor locator) used to drive specification and registration. Effective November 3, 2025, Triangle Tube ceased operations, discontinued processing of outstanding orders, voided warranties prospectively, and continues to fulfill an active voluntary safety recall on certain Prestige and Aerco Esteem condensing gas boilers due to carbon monoxide risk, with spare parts available only through stocking distributors while supplies last.

Triangle Tube firmographics

Firmographics

Name: Triangle Tube
Legal name: Triangle Tube
Website: https://triangletube.com
Company type: Private
Founded year: 1946
Operating status: Closed
Headcount range: 11–50 employees
Short description: Triangle Tube manufactured stainless steel condensing boilers, indirect and direct-fired water heaters, and heat exchangers for residential and light commercial hydronic heating applications across North America. Founded in 1946 and owned by Groupe Atlantic, the company ceased operations on November 3, 2025.
Ownership category
akta.pro rank

Triangle Tube industry classification

Industry

Product category: Hydronic Heating Equipment
NAICS: Heating Equipment (except Warm Air Furnaces) Manufacturing (333414), Power Boiler and Heat Exchanger Manufacturing (33241)
SIC: Heating Equipment, Except Electric & Warm Air Furnaces (3433)
akta.pro primary industry: Boilers, Furnaces & Process Heating Equipment (IMAHAKAD)
akta.pro secondary industry: Heat Transfer Equipment (Heat Exchangers, Boilers, Condensers) (IMAHAEAC)

Keywords

Condensing boilers
Water heating equipment
Heat exchangers
Hydronic heating systems
Stainless steel boilers

Where Triangle Tube is headquartered

Location

Headquarters

HQ city: Gloucester City
HQ country: United States
HQ region: North America

Offices2 records

Markets served

Triangle Tube business model

Business model

GTM type: B2B
Offering type: Hardware or Manufacturing
Cost components: Supply Chain, Operations, Personnel, Marketing or Sales, Technology or R&D

Revenue model

Boiler and Water Heater Equipment Sales: Triangle Tube manufactures and sells condensing boilers, combi boilers, volume water heaters, indirect water heaters, heat exchangers, and accessories to distributors and contractors in the residential and light commercial heating market.
Spare Parts Sales: After ceasing operations in November 2025, spare parts are made available for purchase by stocking distributors as long as parts remain available. All purchases after November 3, 2025 have no warranty.

Pricing tiers

Model	Billing	Price
Unit Pricing	Multi-year contract	Good - Entry-level warranty with 2-year parts and 10-year primary heat exchanger coverage
Unit Pricing	Multi-year contract	Better - Mid-level warranty with 5-year parts, 2-year labor allowance, and 10-year heat exchanger warranty with registration
Unit Pricing	Multi-year contract	Best - Top-tier warranty with 6-year parts, 3-year labor allowance, and 10-year primary heat exchanger warranty with combustion analysis verification
Unit Pricing	Multi-year contract	Smart 316 Good - Lifetime tank warranty with 1-year parts coverage
Unit Pricing	Multi-year contract	Smart 316 Better - Lifetime tank warranty with 1-year parts and 1-year labor allowance (registration required)
Unit Pricing	Multi-year contract	Smart 316 Best - Lifetime tank warranty with 6-year parts and 3-year labor allowance (requires Smart 316 and Triangle Tube Instinct or Prestige boiler installed together plus combustion analysis)

Go-to-market motion2 records

Distribution channels3 records

Marketing channels6 records

Triangle Tube product offering

Product offering

Core offering

Triangle Tube manufactures and supplies high-efficiency stainless steel condensing boilers (solo and combi models), volume water heaters, indirect water heaters, and heat exchangers for residential and light commercial hydronic heating applications. The company pioneered the fire tube heat exchanger for residential use and sells its products through a network of stocking distributors and HVAC/plumbing contractors throughout North America.

Product overview

Triangle Tube is a manufacturer of high-efficiency residential and commercial heating equipment. The product portfolio centers on condensing boilers (both solo and combi models), indirect and direct fired water heaters, and heat exchangers. The product lines include the Instinct series (floor and wall models), Prestige series (wall, cascade, and excellence models), Ionic series, and Keystone series. The company pioneered the fire tube heat exchanger for residential use and offers tank-in-tank technology in their Smart 316 indirect water heaters. Products integrate with Wi-Fi connectivity via the Tsync module for remote monitoring. The company ceased operations in November 2025 with spare parts still available through distributors.

Differentiator

Problem solved

Functional benefit

Brands

Prestige: High efficiency condensing boiler line featuring stainless steel fire tube heat exchanger, available in wall and floor models. Legacy product first to bring fire tube heat exchanger to residential market in 2004.
Instinct
Ionic
Smart 316
Keystone
Tsync
Maxi-Flo

Quantifiable outcome

95% efficiency across entire range for Prestige boilers
+4 more outcomes

Companies that use Triangle Tube

Customer profile

Named customers1 record

Segments4 records

Ideal customer profiles4 records

Triangle Tube technology and API

Technology

Technology focussed No

API detail

Has API: No
API docs
API detail

Core technology

AI maturity

App detail

Feature8 records

Triangle Tube partnerships and signals

Strategic signal

Partnerships

Four partnerships are on record, tiered minor and core.

PHC NewsminorGTM or Marketing Partner · 1 January 2020Triangle Tube's National Sales Manager Mark Avron participated in a podcast interview with PHC News at the 2020 AHR Expo to discuss company progression into the future.
TM Sales Inc. (Jake Fear)minorChannel Partner/ Reseller/ Distributor · 16 August 2019Jake Fear from TM Sales Inc. fronts the how-to and troubleshooting video series on triangletube.com. Content produced for contractors.
Groupe AtlanticcoreStrategic or Co-development Partner · 23 May 2019Triangle Tube is owned and operated by Groupe Atlantic, a leading designer and manufacturer of boilers, water heaters, ventilation and air conditioning, heat pumps and more. Groupe Atlantic was founded in 1968 and is privately-owned with headquarters in Paris, France. The Group has a strong manufacturing culture and focuses on employees and customers. This parent company relationship provides manufacturing support and scale.
Ideal Boiler (UK)coreStrategic or Co-development Partner · 23 May 2019Ideal Boiler is a leading boiler manufacturer in the UK with a rich history of developing quality products and produces over 400,000 units per year. Provides upgraded manufacture support for Prestige products. The Instinct is engineered and manufactured with reliability in mind in the same facility that develops these techniques for Ideal Boilers.

Scale indicators5 records

Recent moves7 records

Expansion highlights4 records

Triangle Tube competitors and assessment

Company assessment

Direct peers

Navien: Manufacturer of high-efficiency condensing gas boilers and combi units for North American residential and light commercial markets. Direct head-to-head competitor to Triangle Tube's Instinct, Prestige, and Ionic lines in the same contractor channel.
Viessmann: German premium manufacturer of condensing boilers and hydronic systems with a strong North American footprint. Competes directly with Triangle Tube's Prestige and Instinct lines; employs former Triangle Tube territory sales talent (e.g., Ray Parent).
Heat Transfer Products (HTP): US-based manufacturer of stainless-steel heat exchanger condensing boilers (Everest, Phoenix, Versa-Hydro) serving residential and light commercial channels. Closest technology analog to Triangle Tube, also using stainless fire tube designs.
Lochinvar: Manufacturer of high-efficiency commercial and residential boilers (Knight, FTXL, FBN) with strong North American contractor distribution. Wholly-owned subsidiary of A.O. Smith; competes with Triangle Tube's Keystone line in light commercial.

Broad incumbents

Weil-McLain: Established North American boiler manufacturer (cast iron and condensing) serving residential and commercial hydronic markets. Competes across Triangle Tube's portfolio with broader legacy install base and longer-running warranty programs.
Bosch Thermotechnology: Global HVAC manufacturer with substantial North American condensing boiler (Greensmart, Buderus) and water heating lines. Competes with Triangle Tube across residential hydronic and combi categories; broader portfolio and deeper channel.
A. O. Smith: Major North American water heater and boiler manufacturer (parent of Lochinvar). Overlaps with Triangle Tube's Smart 316 indirect water heater and condensing boiler lines at scale via Pro Stock and wholesale channels.
Rinnai: Manufacturer of tankless water heaters and condensing boilers (RE and i-SERIES) with deep North American distribution. Direct competitor in tankless/instantaneous hot water that overlaps Triangle Tube's combi and indirect water heater value proposition.
Burnham Holdings: US boiler holding company (Burnham, Crown, Hampton, U.S. Boiler Company) producing cast iron and condensing residential boilers. Direct overlap with Triangle Tube's legacy hydronic footprint in the Northeast US.
Bradford White: Major US manufacturer of commercial and residential water heaters (gas, electric, heat pump, tankless). Closest analogue to Triangle Tube's Smart 316 indirect-fired water heater and Keystone direct-fired volume water heater lines.

Market position

Strengths3 records

Weaknesses4 records

Competitive moat4 records

Key risks5 records

Key highlights7 records

Customer concentration

Triangle Tube compliance and trust

Trust signal

Compliance2 records

Triangle Tube financial estimates

Financial estimate

Revenue estimate

Valuation estimate

Triangle Tube leadership team

Management profile

Number of profiles

Profiles11 records

Triangle Tube funding detail

Funding detail

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

Triangle Tube M&A and investment

M&A and investment

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Triangle Tube

What does Triangle Tube do?

Is Triangle Tube a public or private company?

Triangle Tube is a private company. It is classified as corporate owned and is currently closed.

When was Triangle Tube founded?

Triangle Tube was founded in 1946. It employs 11 to 50 people.

Where is Triangle Tube based?

Triangle Tube is headquartered in Gloucester City, United States, in the North America region.

How does Triangle Tube make money?

Two revenue lines are on record. Boiler and Water Heater Equipment Sales are the primary driver. The others are spare Parts Sales.

Who are Triangle Tube's main competitors?

Direct peers on record are Navien, Viessmann, Heat Transfer Products (HTP) and Lochinvar. Broad incumbents are Weil-McLain, Bosch Thermotechnology, A. O. Smith, Rinnai, Burnham Holdings and Bradford White.

Does Triangle Tube have an API?

No public API is recorded for Triangle Tube.

What industry is Triangle Tube in?

Triangle Tube's product category is Hydronic Heating Equipment. Its primary akta.pro industry code is IMAHAKAD, Boilers, Furnaces & Process Heating Equipment, with a secondary code of IMAHAEAC, Heat Transfer Equipment (Heat Exchangers, Boilers, Condensers). Its NAICS code is 333414 and its SIC code is 3433.