Grand River Spas
American-built hot tubs focused on comfort, efficiency, and long-term reliability.
Built for Comfort. Built to Last.
Grand River Spas is a family-owned spa manufacturer focused on building dependable hot tubs using high-quality materials and thoughtful design. Every spa is crafted with attention to comfort, durability, and everyday usability.
Rather than chasing trends, Grand River focuses on practical engineering — reliable components, efficient insulation, and proven hydrotherapy systems designed to perform year after year.
At Santa Rosa Hot Tubs, we carry Grand River Spas for customers who value straightforward ownership, energy efficiency, and long-term peace of mind.
Why Choose Grand River Spas
Energy Efficient by Design
Grand River Spas meet or exceed California Energy Commission (CEC) standards for portable spas. Their Polar Insulation system helps retain heat efficiently, keeping operating costs manageable year round.
Proven Hydrotherapy Performance
The Grand River Hydraulic System (GRHS) is engineered to balance jet power and water filtration, delivering effective hydrotherapy without unnecessary complexity.
Durable HDPE Structural Base
Each spa is built on a heavy-duty HDPE plastic base designed to resist moisture, rot, and long-term ground contact — unlike traditional wood foundations.
Custom-Fit Thermal Covers
Every Grand River hot tub includes a custom-fit cover with high R-value foam and weather-resistant materials to help keep water clean and heat locked in.
The Benefits of a Warm Soak
Hydrotherapy That Works
Hydrotherapy has been used for centuries to improve circulation, support muscle recovery, and reduce tension. Modern spa jets bring these benefits into everyday life.
Better Sleep, Naturally
Warm water and gentle massage help relax muscles and calm the nervous system, making it easier to fall asleep and stay asleep.
Stress Relief & Relaxation
Hot water improves circulation and triggers endorphin release, helping the body unwind after long days and physically demanding routines.
Joint & Arthritis Support
The combination of heat and buoyancy can ease joint stiffness, reduce inflammation, and increase mobility — supporting more comfortable movement over time.
Grand River Spas Product Lines
From everyday hot tubs to performance-focused swim spas, Grand River offers options designed to fit real homes and real lifestyles.
Premier Series
Full-featured hot tubs designed for comfort, hydrotherapy, and long-term ownership.
Eco Series
Plug-and-play hot tubs built for easy installation and efficient everyday use.
Swim Spas
Fitness and recovery swim systems designed for training and relaxation.
Chill Therapy Cold Plunge
Purpose-built cold therapy systems designed for recovery, circulation, and contrast wellness routines.
Explore the Grand River Collection
View the official Grand River Spas brochure for an overview of available models, features, and design philosophy.
View Grand River Brochure (PDF)