Baltimore Aircoil Brand Guidelines: A Garage Coil of 1938, Then Merck, Then Amsted

John Engalitcheff Jr. and the first patents.

Baltimore Aircoil Company, usually shortened to BAC, dates itself to 1938. Its founder, John Engalitcheff Jr., was born in Moscow and, according to the International Directory of Company Histories in a 2004 entry, took a mechanical engineering degree at Johns Hopkins University in 1930. The company says he then joined a local refrigeration firm, and that in 1938 he built an air-conditioning coil by hand in a garage, the start of the business that took its city’s name.

Sources differ on the first product. The directory says the company at first made cooling coils and added evaporative condensers and cooling towers to its line after the Second World War. BAC’s own timeline, and that of its parent, set against the year 1938 “the first blow-through evaporative condenser.” A March 2026 company release takes the simpler line: he built the “first cooling coil in his garage.”

Engalitcheff’s reputation in the trade rests on patents. The company credits him with 47, of which 23 were in evaporative cooling; the directory gives the same total. BAC says he entered the ASHRAE Hall of Fame in 1996, and in March 2026 it announced his induction into the Natural Refrigeration Foundation’s Legacy 100 Club.

The postwar company grew quickly. The directory records a facility at Jessup, Maryland, in 1956, then plants in Ontario in 1963, Madera, California, in 1966 and Belgium in 1968, along with an export department in 1966 and a Presidential “E” Award for exporting the next year. BAC’s timeline adds packaged, modular equipment from 1955 and the start of expansion into Europe and the Pacific Rim in 1962.

A drug company, then a railway-parts group.

BAC has had two corporate owners. The pharmaceutical and chemicals company Merck & Company bought it in 1970, the directory says, and expanded the product line and factories, including plants at Paxton, Illinois, in 1973 and Milford, Delaware, in 1974. William E. Kahlert, president from 1966 and chief executive from 1970, left in 1976 to co-found EVAPCO.

Amsted Industries, the Chicago group, bought BAC from Merck in May 1985, partly, the directory says, as a cushion against the cycles of its railroad products business. Amsted began in 1902 as American Steel Foundries and took its present name in 1962. Its own history says it went private through an employee stock ownership buyout in 1986 and became 100% employee-owned by 1998; BAC’s about page speaks of its “employee-owners.” The directory records that Amsted announced a sale of BAC in February 2001, and that incoming chairman W. Robert Reum cancelled it. Amsted’s website still lists Baltimore Aircoil Company among its business units, alongside rail, automotive and ConMet.

BAC’s timeline marks those years by product. It lists the Baltibond corrosion protection system in 1981 and the Ice Chiller thermal storage unit in 1982, then the FXV closed-circuit cooling tower in 1995 and the HXV hybrid cooler in 2002. It also says it was the first cooling tower maker with Cooling Technology Institute certification, in 1983, with its FXT model.

The directory describes units that freeze water when electricity rates are lowest and use the melting ice later to cool buildings, and records BAC supplying 60 Ice Chiller units in 1995 for a district system cooling ten buildings in downtown Chicago.

Cases, towers and cut-aways.

Refrigeration is a trade that sells equipment most people only half notice, and its makers tend to picture it where it works. Supermarket case makers show long runs of cabinets, glass doors catching the aisle lights and the shelves stretching away down the frame. Cooling tower makers go up to the roof and shoot their steel boxes against open sky.

Compressor makers work closer in. Their catalogues favour the cut-away: a casing sliced open with the copper, windings and pistons labelled, part engineering drawing and part sales picture. Coil makers go closer still, with condensate beading on fins and tubes in tight rows. Beverage cooler makers have a different job, because the cabinet is also an advertisement, so the photograph often sits on a shop floor with a drink brand’s name on the door.

Much of the category’s public life happens at trade fairs. Chillventa in Nuremberg is the refrigeration industry’s own show, EuroShop in Düsseldorf is where retail fittings meet retail design, AHR Expo moves between American cities for the heating, cooling and refrigeration trades, and Mostra Convegno Expocomfort in Milan covers heating, plumbing and cooling. At these shows the stand does the work of the brand book: a unit opened up, a logo at full height, model names on the panels.

That naming is a habit worth noticing. Ranges are usually identified by letters and numbers, written for engineers who read specification sheets, so a memorable product name or a founding story stands out. The guides here set out what can be checked about each one: who founded it, who owns it, and what it says about where its products are made.

“The World’s Cooling Partner.”

BAC’s global headquarters is at Jessup, where the company says it moved them in 2005; the directory, writing in 2004, described a new headquarters and research building going up next to the old site, with manufacturing there shifting to Milford and Paxton. Cooling Post reported in December 2023 that BAC would expand its factory at Dayton, Tennessee, adding 63 jobs, after growth in its dry coil and adiabatic equipment. Dayton came with Coil Design, a coil maker that had been in a joint venture with BAC since 2019; BAC’s timeline dates the purchase to 2020, while Cooling Post placed it in the October before its report. The timeline also lists a plant at Dalian, China, and the purchase of Eurocoil SP in 2021.

The newest chapter is data centres. In August 2024 Refindustry reported an exclusive worldwide licence for immersion-cooling technology from DUG Technology of Australia, and the company now presents that indoor equipment alongside its evaporative, hybrid and dry products. For 2026 it built a 48-foot expandable trailer, BAC Expo, which PHCPpros reported would tour North America from March to November with five flagship models on show. Its range now includes the Nexus modular hybrid cooler of 2018 and the TrilliumSeries adiabatic products.

BAC calls itself “The World’s Cooling Partner” and uses the line “Reinventing Cooling to Sustain the World,” and its about page speaks of “employee-owners, inventors, and reinventors.” Those are the company’s own descriptions. Its history page and its 2026 release both go back to that first coil, and its about page carries the heading “Reinventing Sustainable Cooling Since 1938.”

For a design guide, Baltimore Aircoil shows how a founding story can hold a brand together through changes of owner. Compare EVAPCO, the Maryland company co-founded by its former chief executive, and Diamond Chain, a name Amsted held for almost seven decades. For this guide we use a deep blue, an ice blue and a copper with a sans, an unofficial interpretation; no product or logo is reproduced.

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