Dimension One Spas® (D1®), founded in 1977, is the industry leader in designing and manufacturing luxury home hydrotherapy and aquatic fitness products. The family-owned business has combined its innovations in materials science and water handling technology to bring customers the most advanced spas in the world that are engineered to rejuvenate both body and mind. D1 has created a benchmark for quality and innovation with a focus on consumer's preferences, offering four distinctly different lines along with a variety of complementary accessories.

Headquartered in Vista, California, D1 was founded by Bob and Linda Hallam. In the early 1970's the Hallams were marketing a line of portable spas at a time when most hot tubs were in-ground. The aboveground spas sold well, but after conducting grass-roots marketing research, the Hallams found that consumers were looking for something distinctly different than the traditional round hot tub. After surveying their customers, they returned to their manufacturer with a long list of features people were looking for in a spa.

When the manufacturer declined to stray from the standard mold, the Hallams took the challenge to go into business for themselves and manufacture a spa that would respond to consumer demands and needs. Based on their research, they produced a spa with 8 unique features not found in any other portable spa, and before they knew it, they could hardly keep up with local demand. Bob Hallam took their new spa on the road to various trade shows and established a strong dealer base. By 1986, D1 had become a major player in the hot tub industry.

D1 hot tubs and aquatic fitness products are now sold through a network of more than 250 dealers in the United States, and 450 dealers worldwide in 30 countries. The company's three product lines include a range of home hydrotherapy and aquatic fitness products that meet a variety of consumer needs and budgets: D1 Reflections®, D1 Bay Collection®, AFS- Aquatic Fitness Systems® and @ Home Hot Tubs®.

D1's phenomenal growth necessitated the building of a state-of-the-art, 135,000 square foot manufacturing plant and headquarters in 1999. At the peak of its season, the $10 million dollar facility is home to more than 400 employees.