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Home  > Known Water Heater Brands  > Water Heater History

Known Water Heater Brands

Holyoke Vintage Water Heater

Introduction

Why so many water heater companies have come and gone since 1890.

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The long alphabetical list of past and present water heater brands creates the impression of constant industry churn. In reality, the story is one of classic industrial maturation: early fragmentation by inventors and regional makers → technological standardization that favored scale → proliferation of private-label “brands” that were never independent manufacturers → successive waves of consolidation driven by capital intensity, regulation, and retail power.

 

Only a handful of true manufacturers have dominated production for decades; most names on historical lists were either short-lived regional players, model names, or retailer house brands that vanished when contracts changed or the retailer itself failed.

Early Fragmentation (1890s–1930s): The Inventor Era

Before standardized mass production, water heaters were relatively simple (or custom) devices. Corrosion of steel or copper tanks was a major problem, instantaneous vs. storage designs competed, and local gas or plumbing companies often built their own units.

 

Dozens of small firms and inventors entered: Edwin Ruud (automatic storage heaters ~1889–1897), Day & Night (solar and later conventional), JC Beckfield, Ideal, various regional foundries, and others. Barriers to entry were low—basic metalworking skills and a local market were often enough. Many of these early companies lasted only a decade or two as technology evolved and better designs appeared.

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The Glass-Lining Revolution and the Rise of Scale (1936 onward)

A.O. Smith’s 1936 patent for fusing glass to steel tanks was the pivotal technological event. It solved the corrosion problem that had plagued earlier heaters and enabled affordable, durable, mass-produced residential units.

 

Once glass lining became the industry standard (and the patent expired in the mid-1950s), the economics changed dramatically:

  • Manufacturing required specialized plants, high-temperature glassing lines, automated welding, and rigorous testing.

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  • National distribution, warranties, and service networks became essential.

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  • Larger producers could spread fixed costs and undercut smaller competitors on price and reliability.

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Post-World War II housing demand accelerated this shift. A.O. Smith, Rheem (water heaters from 1931), State Industries (from 1946–48), and others scaled rapidly. Many smaller regional makers could not match the capital investment or volume and exited or were absorbed.

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The Private-Label Economy: Brands vs. Manufacturers

A large share of the names on historical lists were never independent companies.

 

Major manufacturers produced tanks for retailers under house brands:

  • Sears/Kenmore (often A.O. Smith)

  • Montgomery Ward, Ace, Western Auto, JCPenney, Tru Value, and later Lowe’s

  • Dozens of others (America’s Best, Craftmaster, Energy Saver, Freedom, Home Giant, Super Eagle, etc.)

 

American Water Heater Company alone once manufactured nearly 50 different brand names. When a retailer switched suppliers, went bankrupt (e.g., Montgomery Ward), or restructured its appliance program, those brand names simply disappeared from the market even though the underlying factories continued operating under different labels. This creates the optical illusion of many companies “coming and going.”

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Consolidation Waves and the Modern Oligopoly

From the 1950s–60s onward, acquisitions steadily concentrated production:

  • Rheem acquired Ruud (~1959–60) and later came under Japanese ownership (Paloma, 1988).

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  • A.O. Smith acquired State Industries (2001), GSW/American Water Heater and related Canadian brands (2006), Lochinvar (2011), Takagi’s North American operations (~2010), and others.

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  • Bradford White grew through mergers (roots 1881 → modern form 1968) and later acquired Laars, Bock (2025), and specialty lines.

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  • Smaller players such as Mor-Flo were folded into larger groups.

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By the 1980s–90s the residential tank market was already highly concentrated (the “Big Three”—A.O. Smith group, Rheem/Ruud, and Bradford White—controlled the large majority of volume).

 

High capital requirements, excess capacity at times, national warranty liability, and the need for broad distribution made new entry extremely difficult.

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Regulatory, Technological, and Market Pressures

Later forces accelerated exits:

  • Energy crises and efficiency standards (1970s onward, including NAECA rules) required better insulation and redesigns. Firms that lagged on efficiency lost share.

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  • FVIR (Flammable Vapor Ignition Resistance) standards (~2003–2005) forced major redesigns of gas heaters (flame arrestors, new combustion systems, temperature cut-offs). The engineering and tooling costs were significant; smaller independent makers struggled to comply and many exited or were acquired.

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  • Tankless and heat-pump shifts: The 2000s tankless boom brought strong new competitors from Japan and Korea (Rinnai, Noritz, Navien, Takagi). Traditional tank specialists that failed to adapt lost ground or sold out. Heat-pump water heaters have seen repeated boom-bust cycles of entrants and exits due to cost, reliability perception, and installation complexity.

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  • Economic cycles, steel-price volatility, and the growing power of big-box retailers further favored high-volume suppliers with national logistics.

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Outcome

Today the North American storage water heater market is a rational oligopoly of a few large, well-capitalized manufacturers (primarily the A.O. Smith group, Rheem/Paloma, and Bradford White), supplemented by strong international tankless specialists.

 

The dozens of names that appeared and vanished since 1890 mostly reflect:

  • Early technological experimentation,

  • The private-label practices of retailers,

  • The capital and regulatory barriers that eliminated smaller producers, and

  • Successive acquisition waves that folded independent brands into larger platforms.

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In short, the industry did not experience unusually high corporate mortality so much as normal maturation from a fragmented craft era into a capital-intensive, regulated, scale-driven oligopoly—while the marketing practice of private labeling made the brand landscape look far more crowded than the actual manufacturing base ever was.

Alphabetical List of Water Heater Brands (Past & Present)

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A)  

Abs, Ace, Aceor, Air Generate, Ambassador, American, American Hardware, American Standard, America’s Best, Amtrol, Andrews, A.O. Smith, Apex, Apollo, Aquamatic, Aqua Max, Aqua Temp, Aqua Therm, Ariston, Armor, Ascot

 

B)

Barnett, Bard, Barler, Baxi, Beasley, Berryman, Best, Best Deluxe, Bock, Bosch, Bradford White, Briar, Bryant, Buderus, Burnham

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C)

Cafos, Camard, Capitol, Carrier, Century, Champion, Cimarron, Citation, Clark, Coast to Coast, Command-Aire, Copper-Fin, Craftmaster, Crescent, Crosley, Crown

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D)

Day & Night, De-Limier, Deluxe, Diana, Dux

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E)

Eagle, EcoSmart, Edwards Solar, Efficiency +, Efficiency Pac, Elbi, Electrolux, Energy Master, Energy Saver, Energy Stretcher, Empire Tole, Everhot, Environ Temp, Ewart's

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F)

Feed, Flexcon, Four Most, Fowler, Freedom, Freedome/Nipsco

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G)

General Electric, GeoSpring, Giant, Glascote, Golden Knight, Goodman, Gurney, GSW

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H)

Hamilton, Hardware House, Harvey-Whipple, Hatco, Havells, Hecla, Hubbell, Humphrey, Holyoke, Home Giant, Hotmaster, Hotpoint, Hotstream

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I)

Ideal, Intertherm

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J)

JC Beckfield, J C Penny, Jetglas, John Wood, JNOD

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L)

Lawson, Lennox, Lochinvar, Lowes

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M)

Mainstream, Main, Marathon, Mascot, Master Plumber, Maytag, McQuay, Medal, Mertland, Miller, Mission, Mitsubishi, M. M. Hedges, Moffat, Monarch, Montgomery Ward, Mor-Flo

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N)

National, Nationaline 5, Navien, Neptune, Niagara, Nibe, Noritz

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P)

Patriot, Payne, Peerless Heater, Penfield, Penquin, Perfection, PermaGlas, Pittsburg, Philco, Polaris, Paloma, Premier Plus, President, Professional, ProLine

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R) Redring, Rheem, Rinnai

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S)

SABH, Samovar, Sands, Santon, Sears, Security, Seisco, Sentinel, Service-Star, Servi-Star, Servel, Shamrock, Shield, Singer, Special Deluxe, Squire, Standard, State, Sta-Rite, Stiebel Eltron, Sunshine, Super Eagle, Super-Flo, Superflue, Super Hot, Supreme, Sure-Fire, Sutherlands, Solar Heart

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T)

Takagi, Teledyne Laars, Tempra, The Earl’s Energy, The Plumbery, Thermo-King, Thoro-Clean, Tiny Titan, Titan, Top-Line, Torridheet, Trageser, Tru-Test, Tru Value

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U)

United States Water Heater Company, US Boiler, U.S. Craftmaster, U.S. Supply

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V)

Vanguard, Vaughn, Vaillant, Viessmann, Vista Therm

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W)

Waterbury, Water Furnace, Water Heater Mfg, Well-Mate, Western Auto, Westinghouse, Whirlpool, W.L. Jackson

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X)

XCL Energy Saver

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Z)

Zilmet

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Timeline of Water Heater Brands (Past & Present)

The provided alphabetical list mixes major independent manufacturers, private-label/rebranded products sold by retailers (Sears/Kenmore, Montgomery Ward, Ace, Lowe’s, JCPenney, Western Auto, etc.), regional/defunct makers, European/Asian brands, and model names. Many obscure entries (Abs, Aceor, Aqua Temp, Best Deluxe, Cimarron, De-Limier, Energy Stretcher, Home Giant, Penquin, XCL Energy Saver, etc.) have little or no publicly available company history and were typically private labels produced by the big OEMs (primarily A.O. Smith/State/American group, Rheem/Ruud, or Bradford White).

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A complete individual timeline for every name is not feasible. Below is a synthesized industry + brand timeline focused on verified founding years, water-heater entry, key innovations/acquisitions, and status, drawn from company histories and industry records.

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Overall Industry Milestones

  • Late 1800s–early 1900s: Early storage and instantaneous/gas water heaters appear. Edwin Ruud develops automatic storage tank-type gas water heaters (patents ~1889–1898); production begins ~1889.

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  • Other early players include Ideal (catalogs ~1906) and various regional makers.

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  • 1920s–1930s: Mass-market storage heaters expand. Glass-lining technology emerges.

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  • 1936: A.O. Smith patents the glass-lined steel tank process (industry standard that made durable, affordable residential heaters practical).

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  • 1939: A.O. Smith begins mass residential production (interrupted by WWII).

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  • Post-WWII (1940s–1950s): Housing boom drives volume production. Glass lining becomes widespread (Rheem Rheemglas ~1954–55). Foam insulation and efficiency improvements follow later.

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  • 1970s–1980s: Energy-crisis focus → better insulation, self-cleaning designs (State Sandblaster), higher-efficiency models.

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  • Late 1990s–2000s: Tankless (instantaneous) boom in North America, led by Japanese/Korean makers (Rinnai, Noritz, Takagi, Navien). Condensing technology spreads.

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  • 2010s–present: Heat-pump hybrid electric, smart controls, high-efficiency gas/condensing, and further consolidation under A.O. Smith, Rheem (Paloma), and Bradford White. Many legacy private-label names fade.

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Chronological Brand & Company Timeline (Key Entries)

Pre-1900 / Early Pioneers

  • Ruud (Edwin Ruud): Automatic storage gas water heater development ~1889; company founded 1897 (Pittsburgh). Pioneer of automatic storage heaters. Acquired by Rheem ~1959–1960; brand continues under Rheem/Paloma.

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  • Bradford White roots: Pennsylvania Range Boiler Company founded 1881. Reorganized (Pennsylvania-Bradford) 1959; merged with White Products to form Bradford-White Corporation 1968. Employee-owned since 1992. Professional-channel focus only. Acquired Laars (2005), Bock (2025), and others. Still major U.S. manufacturer.

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  • A.O. Smith: Company founded 1874 (C.J. Smith, Milwaukee; originally machine shop/bicycle parts/auto frames). Glass-lined tank patented 1936; first residential water heaters 1939; commercial glass-lined ~1953–54. Acquired State Industries (2001), GSW/American Water Heater/John Wood/related brands (2006), Lochinvar (2011), Takagi North American operations (~2010), and others. Dominant global player; brands include A.O. Smith, State, American, GSW, John Wood, Lochinvar, Takagi (NA), U.S. Craftmaster, etc.

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  • Ideal: Water heater catalogs associated with American Radiator ~1906; Ideal Boilers (UK) origins ~1905–06. Primarily boilers/radiators/sanitaryware historically; heating products continue.

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1910s–1930s

  • Rinnai: Founded 1920 (Japan). Early gas appliances and water heaters (tankless/instantaneous activity from early years; deliveries including water heaters by 1923). North American tankless expansion ~1999 onward. Major global tankless brand.

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  • Stiebel Eltron: Founded 1924 (Germany) by Dr. Theodor Stiebel (coil immersion heaters). Early instantaneous/electric water heaters (small tankless ~1927; hydraulic instantaneous 1949). Still major in electric tankless/point-of-use and related.

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  • Rheem: Founded 1925 (brothers Richard & Donald Rheem; initially galvanizing/drums). Water heaters begin 1931 (automatic gas storage). Expanded coast-to-coast by mid-1930s. Acquired Ruud (~1959–60), Raypak (1985). Owned by Paloma (Japan) since 1988. Major storage, tankless, and HVAC player. Makes many private-label units historically.

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  • Paloma: Japanese roots (Kobayashi, brand formalized mid-20th century; company activity from early 1900s). Acquired Rheem 1988. Major global (owns Rheem).

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  • Bock: Founded 1929 (Madison, WI) by Oscar Bock — oil-fired specialists. Gas models from 1949; Turboflue innovation ~1960. Employee-owned period; acquired by Bradford White in 2025. Continues as oil/gas specialist brand.

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  • Bosch / Junkers: Hugo Junkers continuous-flow gas water heater work ~1894–96; Bosch acquires Junkers 1932. Long history in tankless/condensing/combi; still active globally.

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1940s–1960s

  • State Industries: Founded 1946 (Herbert Lindahl, Nashville garage — initially stoves). Electric water heaters 1948; gas 1954; porcelain glass-lined tanks 1957. Foam insulation pioneer ~1979; self-cleaning Sandblaster. World’s largest producer by mid-1990s. Acquired by A.O. Smith 2001; brand continues.

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  • GSW / John Wood / related Canadian: Roots in Beatty Bros (~1873) → General Steel Wares (1927 merger) → GSW. Strong Canadian water heater presence. A.O. Smith acquired GSW (and American Water Heater) 2006. John Wood and GSW brands continue under A.O. Smith (Canada focus).

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  • Lochinvar: Walter Vallett enters water heater business 1919 (Everhot). Walter Vallett Company founded 1939; acquires Lochinvar brand 1954 and renames 1957. Moves to Nashville area ~1970. High-efficiency pioneer (Power-Fin etc.). Acquired by A.O. Smith 2011; continues as premium/commercial brand.

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  • Day & Night: Solar water heater origins 1909 (William J. Bailey). Expanded to conventional; Jetglas models from 1953. Merged into larger HVAC groups (Affiliated Gas Equipment / later Carrier-related). Water heater brand largely ends ~1977 (Jetglas trademark to Bradford White).

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  • American Water Heater / ProLine / related private labels: Formal American Water Heater Company activity mid/late 20th century (Johnson City, TN era ~1990s formalization). Produced many private labels (Ace, America’s Best, Craftmaster, various Aqua*, Energy*, Freedom, etc.). Acquired by GSW ~2002 then A.O. Smith 2006. Many of the list’s “American,” “Craftmaster,” “ProLine,” “U.S. Craftmaster,” etc., trace here.

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  • Mor-Flo / Hotstream: Hotstream roots ~1915 (Cleveland); Mor-Flo Industries 1961. Mid-century player; later integrated into larger groups (American Water Heater path).

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1970s–1990s and Later Tankless/Modern Era

  • Navien (Kyung Dong / KD Navien): Founded 1978 (South Korea). Condensing technology pioneer in Asia (early 1980s boilers; domestic hot water models later). U.S. tankless exports ~2008 onward. Major modern condensing tankless/combi brand.

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  • Noritz: Japanese company activity from ~1951 (bath heaters); gas water heaters 1960s; modern electronically controlled tankless from 1981. Strong North American presence. Major tankless brand.

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  • Takagi: Japanese tankless activity from ~1952. North American operations acquired by A.O. Smith ~2010 (joint venture). Continues under A.O. Smith.

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  • EcoSmart: Electric tankless ~2008 (U.S.). Acquired path leads to Rheem (~2015). Continues under Rheem.

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  • Giant (Canada): Founded ~1944. Later associated with A.O. Smith group.

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  • Amtrol: Founded 1946. Better known for expansion tanks (diaphragm 1954) and related; indirect-fired water heaters from ~1980. Still active.

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  • Marathon: Plastic-tank electric water heaters (lifetime warranty focus); under Rheem / Water Heater Innovations.

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  • Retailer private labels: Sears/Kenmore (many historically by A.O. Smith), Montgomery Ward, JCPenney, Ace, Lowe’s (often A.O. Smith Signature), Western Auto, etc. — production by the major OEMs, not independent manufacturing.

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Other Notable / Specialized

  • Hubbell, Hatco: Longer histories in commercial/industrial or foodservice electric water heating/boosters.

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  • Vaillant, Viessmann, Baxi, Buderus, Burnham, Peerless, etc.: Primarily European or U.S. boiler/heating specialists with water-heating products or related lines (long histories, often 19th/early 20th century roots). More boiler/combi focused than pure storage tank residential in North America.

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  • Dux (Australia): Roots ~1915; later under Noritz. Australian/NZ active.

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  • Edwards Solar, Solahart-related: Australian solar focus; many absorbed into Rheem group.

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  • Lennox: Long HVAC history (1895); residential water heaters via recent Ariston joint venture (launched mid-2020s).

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  • Ariston: Italian Merloni roots; electric water heaters later; global group; associated with American Standard water heater brand in some markets.

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  • Many remaining list entries (Barnett, Beasley, Champion, Citation, Crosley, Electrolux limited U.S. water heater history, Empire Tole, Fowler, Golden Knight/Lochinvar models, Harvey-Whipple early heat-pump work with Hotpoint, Hotpoint/GE/Whirlpool rebrands often by Rheem or A.O. Smith, Maytag by State/A.O. Smith, etc.) are private labels, model names, or have only sparse regional/defunct records.

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Current Landscape (Major Active Groups)

  • A.O. Smith group: A.O. Smith, State, American, Lochinvar, Takagi (NA), GSW, John Wood, U.S. Craftmaster, and many historical private labels.

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  • Rheem / Paloma / Ruud: Rheem, Ruud, Marathon, EcoSmart (and historical private labels); strong tankless and storage.

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  • Bradford White: Bradford White, Jetglas heritage, Bock, Laars, professional-only channel.

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  • Tankless specialists: Rinnai, Noritz, Navien, Bosch, Stiebel Eltron (electric), Takagi (via A.O. Smith).

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  • Retailer brands continue as private labels from the above.

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