Bock Water Heaters
Bock Water Heaters is a Wisconsin-based manufacturer of commercial and industrial water heating equipment, offering gas, electric, oil, dual-fuel, indirect, and solar/geothermal products. It sells exclusively through an authorized representative and dealer network serving contractors, architects, and engineers.
- Company typePrivate
- Founded1929
- HeadquartersNeshkoro, United States
- Headcount51–100
- GTM typeB2B
- OfferingHardware or Manufacturing
What Bock Water Heaters does
Bock Water Heaters, Inc. is a U.S.-based manufacturer of commercial and industrial water heating equipment, founded in 1929 and headquartered in Madison, Wisconsin, with a second production facility in Princeton, Wisconsin for tank manufacturing and assembly. The company offers a broad product line organized by fuel type — gas, oil, dual-fuel (oil with natural gas or LP), electric, indirect, and solar/geothermal — plus storage tanks in standard and ASME-certified configurations. Sub-brands target distinct use cases: OptiTHERM (high-efficiency condensing, 125,000-900,000 BTU/hr), ElectriTHERM (heavy-duty electric), ElectriTHERM Swing Tank Plus (heat-pump compatible), ezFIT (atmospheric), Energy Saver (high-BTU atmospheric), Combi-Twin (with coil), SideKick (indirect), and EnviroStar (solar/geo). Differentiated engineering features include ASME pressure vessel certification, AHRI performance certification, UL EPH and CUL classifications, longer vent lengths, and a Common Vent Kit enabling shared venting infrastructure across multiple units.
Bock's commercial customers include contractors, architects, and engineers specifying water heaters for offices, restaurants, hotels, healthcare facilities, and industrial applications; a secondary segment addresses residential and light commercial point-of-use and indirect needs. All sales flow through an authorized representative and dealer network, with no direct-to-consumer or e-commerce channel; the Find-a-Rep directory and trade show presence at MEET 2026 and AHR Expo 2026 are the principal go-to-market vehicles. Pricing is quote-based and not publicly disclosed.
In April 2025, Bradford White Corporation acquired Bock as part of an aggressive multi-brand roll-up strategy. Bock now operates as a brand within Bradford White's portfolio (alongside LAARS Heating Systems, FloLogic, Heat-flo, Electro Industries, and Niles Steel Tank), which expanded from four to eight companies over approximately two years. Prior to the acquisition, Bock operated as a 100% employee-owned manufacturer.
Bock Water Heaters firmographics
Firmographics- Name
- Bock Water Heaters
- Legal name
- Bock Water Heaters, Inc.
- Website
- https://bockwaterheaters.com
- Company type
- Private
- Founded year
- 1929
- Operating status
- Acquired
- Headcount range
- 51–100 employees
- Short description
- Bock Water Heaters is a Wisconsin-based manufacturer of commercial and industrial water heating equipment, offering gas, electric, oil, dual-fuel, indirect, and solar/geothermal products. It sells exclusively through an authorized representative and dealer network serving contractors, architects, and engineers.
- Ownership category
- akta.pro rank
Bock Water Heaters industry classification
Industry- Product category
- Commercial Water Heaters
- NAICS
- Heating Equipment (except Warm Air Furnaces) Manufacturing (333414), Air-Conditioning and Warm Air Heating Equipment and Commercial and Industrial Refrigeration Equipment Manufacturing (333415), Ventilation, Heating, Air-Conditioning, and Commercial Refrigeration Equipment Manufacturing (33341)
- SIC
- Air-Cond & Warm Air Heatg Equip & Comm & Indl Refrig Equip (3585), Heating Equip, Except Elec & Warm Air; & Plumbing Fixtures (3430), Heating Equipment, Except Electric & Warm Air Furnaces (3433)
- akta.pro primary industry
- Heat Transfer Equipment (Heat Exchangers, Boilers, Condensers) (IMAHAEAC)
- akta.pro secondary industries
- Heat Exchangers & Thermal Transfer Equipment (IMAHAKAC), Heat Exchangers, Coils & Hydronic HVAC Components (IMADANAF)
Keywords
Where Bock Water Heaters is headquartered
LocationHeadquarters
- HQ city
- Neshkoro
- HQ country
- United States
- HQ region
- North America
Markets served
Bock Water Heaters business model
Business model- GTM type
- B2B
- Offering type
- Hardware or Manufacturing
- Cost components
- Supply Chain, Personnel, Operations, Technology or R&D, Marketing or Sales
Distribution channels1 record
Marketing channels2 records
Bock Water Heaters product offering
Product offeringCore offering
Bock Water Heaters manufactures and sells commercial water heating equipment, including gas, oil, electric, dual-fuel, indirect, and solar/geothermal water heaters, plus storage tanks. Products span sub-brands such as OptiTHERM (high-efficiency condensing, 125,000–900,000 BTU/hr), ElectriTHERM (heavy-duty electric), SideKick (indirect), EnviroStar (solar/geo), ezFIT, Energy Saver, and Combi-Twin. All units are manufactured in Wisconsin and sold exclusively through authorized representatives to commercial and light-commercial buyers.
Product overview
Bock Water Heaters is a manufacturer of water heating equipment offering a comprehensive portfolio of gas, oil, electric, indirect, and solar/geothermal water heaters, along with storage tanks. The product lineup is organized by fuel type (Gas, Oil, Dual Fuel, Electric, Indirect, Solar/Geo) and includes branded sub-products such as OptiTHERM (high efficiency condensing), ElectriTHERM (heavy duty electric), Swing Tank Plus (heat pump compatible), ezFIT (atmospheric), Energy Saver (high BTU), Combi-Twin (with coil), SideKick (indirect), and EnviroStar (solar/geo). The company also offers storage tanks in standard and ASME-certified configurations. All products are manufactured in Wisconsin at two facilities and the company is 100% employee owned, now part of the Bradford White Corporation family.
Differentiator
Problem solved
Functional benefit
Brands
- OptiTHERM: High efficiency condensing water heaters (600,000 - 900,000 BTU/hr and 125-250,000 BTU/hr models)
- ElectriTHERM
- ezFIT
- Energy Saver
- Combi-Twin
- SideKick
- EnviroStar
- ElectriTHERM Swing Tank Plus
Products and services
- OptiTHERM (High Efficiency Condensing Gas Water Heater) High-efficiency condensing gas water heater available in 600,000-900,000 BTU/hr and 125,000-250,000 BTU/hr models with longer vent lengths and ASME certification, targeted at commercial and industrial applications requiring high BTU output.
- ElectriTHERM (Heavy Duty Electric Water Heater) Heavy-duty commercial electric water heater engineered for high-demand commercial and industrial applications.
- ElectriTHERM Swing Tank Plus Electric water heater designed for integration with heat pump systems in commercial and residential applications.
- Light Electric (Point of Use) Point-of-use electric water heaters providing localized hot water for residential and light commercial installations.
- SideKick (Indirect Water Heater) Indirect water heater using boiler heat exchange technology for residential and light commercial applications.
- EnviroStar (Solar/Geo Thermal Water Heater) Solar and geothermal water heating system for renewable energy integration in commercial and residential buildings.
- ezFIT (Atmospheric Gas Water Heater) Atmospheric gas water heater designed with simplified installation for commercial applications.
- Energy Saver (High BTU Atmospheric) High BTU atmospheric gas water heater for commercial applications requiring high capacity.
- Combi-Twin (PDV with Coil) Power Direct Vent gas water heater with built-in coil for indirect heating in commercial installations.
- Storage Tanks Commercial and residential storage tanks available in standard and ASME-certified configurations for hot water storage.
- Oil Water Heaters Oil-fired water heaters for commercial and industrial applications where oil is the preferred fuel source.
- Dual Fuel Water Heaters Dual fuel water heaters capable of operating on oil and natural gas or LP for fuel flexibility.
- Parts and Accessories Replacement parts and accessories for Bock water heater installations, supported by an online Parts Finder tool.
- ElectriFLEX MD, AeroTherm G2, eF XT, eF Series Turbo, and Infiniti Models New commercial water heater, boiler, and burner models showcased at AHR Expo 2026 under the Bradford White family of brands.
Companies that use Bock Water Heaters
Customer profileSegments2 records
Ideal customer profiles2 records
Bock Water Heaters technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Integration1 record
Feature6 records
Bock Water Heaters partnerships and signals
Strategic signalPartnerships
One partnership is on record.
- Bradford White CorporationcoreBradford White Corporation acquired Bock Water Heaters, Inc. and related companies in April 2025. The acquisition enhances Bradford White's manufacturing capacity and product offerings in water heating. Bock now operates as part of Bradford White's portfolio of brands including LAARS Heating Systems, FloLogic, Heat-flo, Electro Industries, and Niles Steel Tank. Bradford White, founded in 1881 and headquartered in Pennsylvania, has completed four acquisitions in approximately two years, expanding from four to eight companies under its umbrella.
Recent moves5 records
Expansion highlights5 records
Bock Water Heaters competitors and assessment
Company assessmentBroad incumbents
- A. O. Smith Corporation: A. O. Smith is one of the largest North American manufacturers of residential and commercial water heaters (gas, electric, tankless, heat pump) and a global water treatment company. It is a broad incumbent competitor to Bock across overlapping commercial water heater product categories, including high-efficiency gas and electric lines.
- Rheem Manufacturing Company: Rheem is a major U.S. manufacturer of water heating, heating, cooling, and commercial refrigeration products, with extensive commercial water heater offerings (gas, electric, tankless, heat pump). It is a direct competitor to Bock in commercial water heating with broader scale and brand recognition.
- State Industries (A. O. Smith brand): State Industries is a manufacturer of residential and commercial water heaters, now operating as a brand of A. O. Smith. Its commercial water heater product lines compete with Bock in similar commercial specification channels.
- Bradford White Corporation: Bradford White is a leading U.S. manufacturer of residential and commercial water heaters and the parent company of Bock following the April 2025 acquisition. Its commercial water heater lines directly compete with and overlap with Bock's product portfolio within the same corporate family.
Direct peers
- Rinnai America Corporation: Rinnai is a leading manufacturer of tankless water heaters and condensing water heating solutions for residential and commercial applications. Its tankless and high-efficiency condensing products overlap directly with Bock's OptiTHERM condensing line and tankless-adjacent offerings.
- Navien Inc. Navien manufactures high-efficiency condensing tankless water heaters and combi-boilers for residential and light commercial use. Its condensing water heater technology and commercial product positioning make it a direct comparable to Bock's OptiTHERM and Combi-Twin products.
- Lochinvar (Bradford White brand): Lochinvar is a manufacturer of high-efficiency commercial boilers and water heaters (gas, electric, and renewable) that is now part of the Bradford White portfolio alongside Bock. It directly competes with Bock in commercial water heating and high-BTU boiler applications.
- HTP (Heat Transfer Products): HTP manufactures high-efficiency commercial and residential boilers, water heaters, and indirect-fired water heaters. Its commercial water heating and indirect product lines overlap directly with Bock's OptiTHERM and SideKick indirect product categories.
- U.S. Boiler Company: U.S. Boiler Company manufactures hydronic heating boilers and indirect-fired water heaters for residential and light commercial applications. Its indirect water heating and high-efficiency boiler products are comparable to Bock's SideKick and Combi-Twin offerings.
Emerging players
- Watts Water Technologies: Watts Water Technologies designs and manufactures water quality, conservation, and flow-control products for residential, commercial, and institutional applications. While not a direct water heater OEM, it is an adjacent peer in commercial water systems that increasingly integrates heating and storage products.
Market position
Strengths4 records
Weaknesses4 records
Competitive moat5 records
Key risks5 records
Key highlights6 records
Customer concentration
Bock Water Heaters compliance and trust
Trust signalCompliance4 records
Bock Water Heaters financial estimates
Financial estimateRevenue estimate
Valuation estimate
Bock Water Heaters leadership team
Management profileNumber of profiles
Bock Water Heaters funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Bock Water Heaters M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Bock Water Heaters
What does Bock Water Heaters do?
Bock Water Heaters manufactures and sells commercial water heating equipment, including gas, oil, electric, dual-fuel, indirect, and solar/geothermal water heaters, plus storage tanks. Products span sub-brands such as OptiTHERM (high-efficiency condensing, 125,000–900,000 BTU/hr), ElectriTHERM (heavy-duty electric), SideKick (indirect), EnviroStar (solar/geo), ezFIT, Energy Saver, and Combi-Twin. All units are manufactured in Wisconsin and sold exclusively through authorized representatives to commercial and light-commercial buyers.
Is Bock Water Heaters a public or private company?
Bock Water Heaters is a private company. It is classified as corporate owned and is currently acquired.
When was Bock Water Heaters founded?
Bock Water Heaters was founded in 1929. It employs 51 to 100 people.
Where is Bock Water Heaters based?
Bock Water Heaters is headquartered in Neshkoro, United States, in the North America region.
Who are Bock Water Heaters's main competitors?
Broad incumbents on record are A. O. Smith Corporation, Rheem Manufacturing Company, State Industries (A. O. Smith brand) and Bradford White Corporation. Direct peers are Rinnai America Corporation, Navien Inc., Lochinvar (Bradford White brand), HTP (Heat Transfer Products) and U.S. Boiler Company. Watts Water Technologies is listed as an emerging player.
Does Bock Water Heaters have an API?
No public API is recorded for Bock Water Heaters.
What industry is Bock Water Heaters in?
Bock Water Heaters's product category is Commercial Water Heaters. Its primary akta.pro industry code is IMAHAEAC, Heat Transfer Equipment (Heat Exchangers, Boilers, Condensers), with a secondary code of IMAHAKAC, Heat Exchangers & Thermal Transfer Equipment. Its NAICS code is 333414 and its SIC code is 3585.