Johnson Supply does what it can. Through about two dozen locations in hot spots like Houston and Lake Charles, Louisiana, Johnson Supply distributes air-conditioning and refrigeration equipment, supplies, and parts from more than 200 manufacturers. Since those places also get cold, relatively speaking, the company sells heating and ventilation equipment as well. Its 200 suppliers include names like York, Friedrich, Warren, Mueller, and Johnson Controls. The company was founded in 1953 by Carl I. Johnson, Sr.

Worcester Heat Systems may have to look for a new line of work. Also known as Worcester Bosch, the UK company primarily makes oil and gas boilers (cast iron, combination, condensing, floor-standing, wall-mounted, and system boilers). Other offerings include solar panel hot water heating systems (Worcester Blue Skies) and under-floor heating systems. Founded in 1962, Worcester Heat Systems was acquired by automotive component manufacturer Bosch in 1996 and is part of the Worcester Bosch group.

American Wood Moulding manufactures and distributes wood mouldings and other millwork products throughout the world. It offers Focal Point and FYPON brand products, as well as stair parts and boards made by Sure-Wood Forest Products. Wood is supplied by company-owned or leased plantation forests in New Zealand, and American Wood Moulding operates about a dozen manufacturing facilities in the US, Mexico, Brazil, Chile, and New Zealand. American Wood Moulding is wholly owned by the family of president Matt Hagen after they bought out the 50% share in the company previously owned by Tenon Limited (formerly Fletcher Challenge Forests) in late 2006.

Founded in 1940 by Gene Winchester, QUIKRETE is still owned and operated by the Winchester family. QUIKRETE is set in its ways. The company makes more than 200 dry-packaged cement and concrete products, including concrete mixes, mortar mixes, and stuccos, as well as sand and aggregates. The products are sold to do-it-yourself consumers and professional contractors. QUIKRETE also makes coatings and concrete repair products, including vinyl patching mixes and tubed crack sealers. the company operates about 95 manufacturing plants throughout North, South, and Central America; it also has a research and development center in Atlanta.

Dudek, where's my environmental consultant? California, apparently. The environmental firm , Dudek, works with private companies and municipalities to provide engineering, environmental consulting, construction, design, and project management services. The firm has overseen projects that involve natural resource management, infrastructure development, and regulatory compliance. Dudek specializes in water infrastructure, wastewater engineering, energy, transportation, urban forestry, education, and real estate development projects. Founded in 1980 by president Frank Dudek, the employee-owned company has seven offices in California.

Hasegawa International pushes wood products from all over the world to market in Japan. Its product offerings include North American Red Alder hardwood logs and lumber, interior and entrance doors; Russian birch logs, lumber, plywood, panels, flooring, and doors; and Chinese Asian Cherry doors, flooring, and kitchen cabinet doors. Hasegawa International also imports Russian Red Pine and Larch products including posts, beams, lumber, veneer, panels, and doors. The company has two sales offices in Japan and two sales offices as well as a Red Alder manufacturing facility in China. Hasegawa International was founded in 1981.

Kentucky-Indiana Lumber, which does business as K-I Lumber & Building Materials, offers cabinets, decking, doors, lumber, millwork, plywood, roofing, siding, stairways, trusses, windows, and other building materials to dealers, builders, remodelers, do-it-yourselfers, and general contractors. The company's market area primarily consists of the seven-state area surrounding its four distribution yards in Louisville and Lexington, Kentucky and Clarksville and Evansville, Indiana, though the company does distribute its products nationally and internationally. It also installs cabinets, custom millwork, carpeting, and tile. Kentucky-Indiana Lumber was founded in 1932.

Charter Builders could write a primer on educational construction. The company -- which also works on a variety of commercial, industrial, mixed-use, retail, and other types of projects -- may be best known for its portfolio of educational and other institutional facilities, primarily in North Texas. Charter Builders provides public- and private-sector clients with construction management, design/build, and general contracting services; it also offers renovation services and building additions. The company, which was founded in 1971. In 2006 it was acquired by Heery International, itself a subsidiary of Balfour Beatty.

R&H Construction is a building and design firm that offers services in restoration, interior design, and construction to corporations, small businesses, developers, property managers, and private and public agencies. The firm has worked on fitness centers, restaurants, medical offices, apartments, automotive dealerships, and golf course clubhouses. R&H opened its doors in 1979 when it first cut its teeth on shopping centers. It serves the Pacific Northwest and has offices in Portland and Bend, Oregon.

Doka USA, part of Germany-based Doka Group, manufactures, sells, and rents frameworks for concrete construction projects. Its products include formwork beams, panels, floor props, and supporting frames for walls, floors, platforms, and load-bearing towers. They are used in major public structures, such as bridges, roadways, tunnels, airports, and dams. The company also offers tie rods and anchors, climbing cones, and suspension accessories, all used to ensure safety when installing formworks. Formerly known as Conesco Doka, Doka USA has sales and branch offices in California, Florida, Georgia, Illinois, Maryland, New Jersey, and Texas.

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