Miniature acrylic pools, and the requests that followed.

Cal Spas is a hot-tub and outdoor-living maker based in Pomona, California, east of Los Angeles. Its story, as the company and the trade press have told it, begins not with a hot tub but with a swimming pool. The business behind the name was California Acrylic Industries, a Pomona pool builder. To show customers a range of pool designs without the space for full-size examples, it made small acrylic versions of its pools and displayed them at a county fair.

According to that account, visitors who saw the miniature pools began asking whether the company could make acrylic hot tubs. The requests turned into orders, and a year later California Acrylic Industries stopped building pools altogether to concentrate on hot tubs; that is the point at which the company dates the birth of Cal Spas. EuroSpaPoolNews, reporting on the company’s thirtieth anniversary in June 2009, put the county fair in 1978 and the switch to hot tubs a year later. A Cal Spas press release distributed through GlobeNewswire in January 2011 said the company was founded in 1979 as a maker of upscale hot tubs. The company’s own “Our Story” page, as published in 2026, says Cal Spas began in 1978 at a Pomona county fair and describes the brand as “crafting comfort since 1978”, while a directory profile in Pool Magazine tells the same story but places the fair in 1979. The two dates describe the same sequence of events: a fair display, then a move into hot tubs a year later.

The company says that what began with a few models soon expanded to nationwide distribution, and that its headquarters is in Pomona. In the January 2011 release the company was led by Casey Loyd, quoted there as president of Cal Spas, speaking about a dealer event at which the company had shown its new products for the year.

Hot tubs first, then gazebos, saunas and Cal Flame.

The range did not stay with hot tubs. Cal Spas says that by the mid-1990s it had grown from a spa maker into an outdoor-living company, adding gazebos, barbecue islands, fireplaces and saunas under the mission “Changing The Way You Feel.” By the time of the 2009 EuroSpaPoolNews report the family of names around Cal Spas was settled: Cal Spas for hot tubs and swim spas, Cal Designs for gazebos, Cal Heat for indoor and outdoor saunas, and Cal Flame for outdoor grills, barbecue islands, fireplaces and firepits. The 2011 release repeated the same line-up and used the trademarked phrase “Home Resort Products” to describe the whole family.

The shared “Cal” prefix does much of the work of tying the businesses together: each name tells the buyer which part of the back garden it belongs to while keeping the Pomona origin in view. Cal Flame, in particular, has been presented as a brand in its own right, with its own grills and outdoor-kitchen islands; the January 2011 release named a five-burner convection grill and a “Knock Down” barbecue island series among that year’s launches.

On where the products are made, the company’s answer is consistent. Its website says Cal Spas hot tubs are “Proudly Made In The USA From The Finest Components From Around The World”, and both the 2009 trade report and the 2011 release said the company produces its collections from its headquarters in Pomona. The phrase about components sourced from around the world is the company’s own, and it is the company that says it. Cal Spas sells through a network of specialty dealers rather than in its own name at every location.

No change of ownership appears in the sources: the trade reports from 2009 and 2011 and the company’s own pages all present Cal Spas as a Pomona company, with the outdoor brands grouped beneath it.

Design and documentation.

The brands in this group all make hot tubs and spas, and several also make swim spas, saunas or other products for the garden. Hot-tub and spa makers in general sit at many different points in the trade: some began as pool builders or as divisions of larger companies, some build in their home town and buy parts from elsewhere, and some now sit inside bigger groups that own several spa names at once.

A hot-tub brand usually carries its identity less through a single tub than through its logo, its series and model names, its catalogues and the dealer showrooms where the tubs are seen. The company behind the name may have changed owners, moved its production or grown well beyond the place where it started, so the plain questions behind each name are worth asking: who started it, who owns it now, and where its tubs are actually made.

Each guide separates what independent sources record from what the company says about itself — its founding story, its owners over time, where its products are made and how its identity has changed — and marks plainly what rests only on the company’s own word.

Model names, jets and the “Cal” family.

Cal Spas’ visual identity is carried less by a single mark than by the language of its catalogue. Model families are named for the places and settings where a hot tub might sit. On the company’s website in 2026 the hot-tub range was organised into lines including Patio, Escape, Platinum and Swim, with “Plus” and “X” versions alongside, and a cold-plunge tub listed with them. Features have tended to receive trademarked names of their own: the 2011 release named stainless-steel “Candy Cane” jets and “LED Hi-Light” jet lighting, and the current site lists an underwater lighting option called UnderGlow.

Showrooms are another part of the picture. Because Cal Spas sells through dealers, its name appears on independent shop fronts and at county fairs and home shows. The website’s customer reviews mention meeting the company’s team at county fairs, and its pages place hot tubs, firepits and barbecue islands side by side, so that a buyer sees the whole “Cal” family in one place.

For a design guide, Cal Spas shows how a single prefix can hold together a group of names that cover very different products, from a swim spa to a firepit, and how a company can keep its town at the centre of its story. Compare Harvia, the Finnish sauna-heater maker, and POLYWOOD, the outdoor-furniture brand. For this guide we use a pool blue, an acrylic aqua and an ember red with a heavy sans, an unofficial interpretation; no product or logo is reproduced.

Keep Cal Spas’s identity on hand — save it to a board in the Made Good inspiration library.