Details
| Dimensions | 2130*2130*950 mm |
| Voltage | 230 V |
| Water Capacity | 1249 L |
| Dry Weight | 396 kg |
| Filled Weight | 1645 kg |
| Massage Jets | 64 |
| Jet Pump | Single-Speed |
| Heater | Calefact® 4400 |
| Warranty (Shell) | 5 Years |
Offer Includes
- 1x Polyhymnia Hot Tub
- 1x Dominus® Control digital control panel
- 64 massage jets (pre-installed)
- 1x Filtrex® filtration system
- 1x UVitron® UV System, Puraera® Ozone purification unit
- 4x comfort headrest pillows
- 1x LED lighting system
- 1x Thermal cover
- Assembly hardware & fittings
- User manual & installation guide
Product Description
The Polyhymnia is part of the ONSONSPA Signature Collection - a premium 5-7+ person outdoor hot tub designed for intimate relaxation or family fun. With its 7-seat configuration and 64 strategically placed massage jets, this spa delivers a full-body hydrotherapy experience right in your backyard. Built on a Anticorrosive Wood frame with a Acrylic shell, the Polyhymnia combines durability with elegant design. The Blackwood cabinet creates a sophisticated look that complements any garden setting. Featuring the Dominus® Control system and Clarifex® System water care technology, maintaining crystal-clear water is effortless. The UVitron® UV System, Puraera® Ozone system keeps water hygienic, while the Calefact® 4400 ensures energy-efficient operation.
Material Details
- Type: Outdoor Whirlpool Hot Tub
- Collection: Signature Collection
- Capacity: 7 persons
- Dimensions: 2130*2130*950 mm
- Shell: Acrylic
- Frame: Anticorrosive Wood
- Cabinet: Blackwood
- Shell Color: Tuscan Sun
- Massage Jets: 64
- Jet Pump: Single-Speed
- Purification: UVitron® UV System, Puraera® Ozone
- Filtration: Filtrex®
- Water Care: Clarifex® System
- Heater: Calefact® 4400
- Control: Dominus® Control
Packing and Assembly
- Choose Location: Flat, level surface capable of supporting 1645 kg. Ensure drainage and electrical access (230 V).
- Electrical: Connect to dedicated 230 V circuit with GFCI protection. Professional installation required.
- Fill & Check: Fill through filter compartment. Check all fittings for leaks before powering on.
- Initial Run: Power on, run heater and jets 24 hours with no chemicals to flush system.
- Water Treatment: Drain and refill. Begin regular treatment with ONSONSPA chemical starter kit.
Professional electrical installation is required.
Warranty & Support
Honest Warranty & Support
Every ONSONSPA product is backed by a clear, honest warranty. If anything goes wrong, our U.S.-based support team in Bellevue, Washington is here to help.
- Warranty coverage: Clear terms on your product's shell, components, and parts.
- Replacement parts: Genuine parts available for your model.
- Repair process: Simple, step-by-step support from our team.
- Contact us: Call 425 574 0734 or email support@onsonspa.com — we respond within 1 business day.
Shipping & Warehouses
We ship from multiple warehouses across the United States for fast, reliable delivery.
- 26597 San Bernardino Ave, Redlands, CA 92374
- 2801 Route 130, Unit 3, North Brunswick, NJ 08902
- 200 Metcalf Rd Extension, Suite 200, Forest Park, GA 30297
- 18220 80th Place South, Kent, WA 98032
Why ONSONSPA
Q&A
Frequently Asked Questions
Where can I install my hot tub / swim spa / cold plunge?
Place it on a level, load-bearing surface such as a concrete pad or reinforced deck — never directly on grass or sand. Confirm your site's weight capacity before delivery.
What power supply does it need?
Most hot tubs and swim spas require a dedicated 220V circuit; some smaller plug-and-play models run on standard 110V. Check the power spec for your specific model before ordering.
Can I use it outdoors in winter?
Yes — well-insulated units are built for year-round outdoor use. Keep the cover on when not in use to retain heat and reduce running costs.
How do I keep the water clean?
Follow the included maintenance routine: sanitize regularly, keep pH balanced, and clean/replace filters on schedule. Full water-care guidance ships with the unit.
How many people does the model I'm looking at seat?
Capacity is listed per model on the product page — units in this range seat from 2-4 up to 5-7+ people depending on the model you choose.
Delivery, warranty and returns for large units?
24-month warranty included. U.S. delivery: oversized freight is priced at checkout based on your location. 30-day returns apply, with return shipping possible on oversized items.
