Why there are like 50 water heater brands when only a few companies actually make them

 

If you’ve ever looked at water heater brands and thought, “why are there 40 of these and I’ve only heard of three,” that’s not you being bad at shopping. For like a hundred years, the name on the tank and the company that actually built it have been two different things.

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Here’s the actual brand story.

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1890s–1930s: everybody and their uncle had a water heater brand

Before big factories and names you’d recognize at Home Depot, water heaters were kind of a free-for-all. Tanks were just steel or copper boxes that rusted out constantly. Some stored hot water. Some heated it on the spot. A lot of local gas and plumbing shops just built their own.

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That’s why early brand lists look chaotic. Real inventors and tiny companies were actually in this:

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• Edwin Ruud basically invented the automatic storage water heater around 1889–1897. Wild part: Ruud is still a name you see today.

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• Day & Night started with solar heaters, then regular ones.

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• Then you’ve got JC Beckfield, Ideal, random regional foundries, and a bunch of local shops.

 

Barriers were low. If you could work metal and sell to people in your town, congratulations, you had a water heater brand. Most of those names lasted 10–20 years and died when better designs showed up.

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1936: glass lining is the reason modern brands even exist

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The turning point for water heater brands wasn’t a logo. It was A.O. Smith’s 1936 patent for fusing glass to the inside of a steel tank.

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Before that, tanks rotted. After that, you could make a cheap home water heater that didn’t die immediately. That’s the tech that made the brands people still buy possible.

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Once glass lining became the standard (and the patent ran out in the mid-1950s), the whole brand game flipped:

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• You needed real factories, super-hot glassing lines, automated welding, and serious testing.

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• You needed nationwide shipping, warranties, and people who could actually service the thing.

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• Big companies could make them cheaper and more reliable than some local shop.

 

Then World War II ended, the housing boom hit, and demand exploded. The brands that scaled were:

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• A.O. Smith

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• Rheem (they’d been in water heaters since 1931)

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• State Industries (started around 1946–48)

 

A bunch of smaller regional names couldn’t afford the factories or the volume. They either shut down or got bought.

 

That’s when the “random local water heater company” era basically ended.

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Most of those “brands” were never even companies

 

This is the part that makes old brand lists look way messier than they were: a ton of the names were just stickers.

Big manufacturers built the same tanks and slapped different labels on them for stores.

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• Sears Kenmore? Often just an A.O. Smith tank wearing a Sears outfit.

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• Montgomery Ward, Ace, Western Auto, JCPenney, Tru Value, later Lowe’s — same idea.

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• Then random house brands like America’s Best, Craftmaster, Energy Saver, Freedom, Home Giant, Super Eagle… yeah.

 

American Water Heater Company once made almost 50 different brand names. Fifty.

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So when Sears changed suppliers, or Montgomery Ward went bankrupt, or a hardware chain redid its appliance lineup, that brand name just vanished. The factory didn’t die. It just printed a different logo on the next batch.

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That’s why it looks like water heater companies were constantly appearing and dying. A lot of them were never companies. They were marketing.

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Who ate who (aka how we got the names you still see)

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After the 1950s, manufacturers began buying each other.

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• Rheem had been making water heaters since 1931. Around 1959–60, they bought Ruud — yes, the original inventor’s company. In 1988 they were bought by Paloma, a Japanese company. That’s why Rheem and Ruud are still everywhere. Same family now.

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• A.O. Smith went shopping: State Industries in 2001, then GSW / American Water Heater and a bunch of Canadian brands in 2006, Takagi’s North American stuff around 2010, Lochinvar in 2011, and more.

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• Bradford White is the other big one. The name goes back to 1881, but the modern company really took shape in 1968. They later picked up Laars, Bock (that one’s 2025), and some specialty lines.

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• Smaller names like Mor-Flo got folded into the bigger groups.

 

By the ’80s and ’90s, three players already owned most of the regular tank market: A.O. Smith and everything they bought, Rheem/Ruud, and Bradford White.

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Not because the industry was cursed. These things got expensive to build — special glass-lining plants, national warranties, parts and service everywhere. A small regional shop couldn’t keep up. New tank brands basically couldn’t get in.

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Then the rules and new tech finished off whoever was left

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By the 1970s, it wasn’t just about who had the biggest factory. Energy crises hit, and the government started requiring water heaters to be more efficient. Better insulation, new designs. If you couldn’t afford the redesign, you lost.

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Then around 2003–2005 came FVIR — the flammable vapor rule. Gas heaters had to stop igniting fumes on the garage floor. That meant flame arrestors, new combustion setups, extra shutoffs. The engineering and tooling cost a fortune. A lot of leftover small brands just couldn’t do it. They sold out or disappeared.

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Then tankless got real in the 2000s. Japanese and Korean brands like Rinnai, Noritz, Navien, and Takagi showed up with actual tankless units and stuck around. Old-school tank companies that ignored that either lost ground or got bought.

 

Heat-pump water heaters have been the same loop: new brands pop up, people say they’re expensive or annoying to install, some vanish, some come back.

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Add steel prices going crazy, recessions, and Home Depot / Lowe’s deciding who even gets shelf space, and yeah — only the high-volume players survived.

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What’s actually left

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Walk into a store looking at tank water heaters, and you’re mostly looking at three groups:

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• A.O. Smith (which also owns State, American, GSW, Lochinvar, and a bunch of old names)

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• Rheem / Ruud (Rheem bought Ruud around 1959–60, later owned by Japan’s Paloma)

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• Bradford White (old roots back to 1881, modern company from 1968, later picked up Laars and Bock)

 

Plus the tankless specialists from overseas: Rinnai, Noritz, Navien, and the rest.

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All those random names from 1890 until now weren’t some mysterious graveyard of companies. They were:

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• early inventors trying stuff before anyone knew what worked

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• store brands slapped on tanks from the same few factories

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• small makers who couldn’t afford the plants, warranties, or new safety rules

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• names that got bought and folded into the big three

 

The industry didn’t have some crazy death rate. It just grew up — from a bunch of local metal shops into a few giant companies that actually make the tanks. Stores kept inventing new labels, so it looked like there were 50 water heater brands.

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Quick brand decoder

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Not a 100% rule, but this is the useful version:

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• Kenmore → often A.O. Smith made

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• Ruud → Rheem family (same company since about 1960)

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• State / American → A.O. Smith now

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• Rheem → Rheem / Paloma

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• Bradford White → the other big independent

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• Rinnai, Noritz, Navien → actual tankless companies, not relabeled tanks

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• Day & Night, Craftmaster, Super Eagle, old store brands → usually dead labels, not dead factories

 

So if you’re staring at two water heaters with different names and the same guts… yeah. That’s been the whole industry for decades.