Founded in 1977 in Carlsbad, Dimension One Spas manufactures hot tubs and swim spas from its corporate headquarters and production facility on Aston Avenue, holding the original patent on the curvilinear spa shell shape. The company's backyard-integration engineering complements the outdoor living projects handled by nursery suppliers such as Armstrong Garden Centers on El Camino Real. Now part of the Jacuzzi Group following a 2013 acquisition, D1 maintains its Carlsbad-based design and engineering teams producing three distinct product tiers: the Bay Collection, Reflections Collection, and AquaFit swim spa systems. Pool and spa contractors including Premier Pools & Spas coordinate installations requiring D1's SmartTub connected-spa technology and UltraPure ozone water purification. The patented UltraLife thermoformed shell carries a lifetime warranty against cracking and fading, and the EnviroTect cabinet skirt is constructed from recycled composite material with its own lifetime structural guarantee.