The Arctic Spa Lunar is a Core Series hot tub that measures 84 × 84 × 39 in (213 × 213 × 99 cm), holds 375 US gal (1,420 L), has 4 molded seats, and is listed for up to 6 people.
Contents
- 1 Arctic Spa Lunar dimensions and capacity
- 2 Which Lunar specs does this guide cover?
- 3 Lunar seating and layout
- 4 Jets and pump packages
- 5 Electrical requirements for the Lunar
- 6 Will the Spa Filter Adapter fit the Lunar?
- 7 Lunar manuals and drawings
- 8 Compare the Lunar with other Arctic Spa models
- 9 More help for Arctic Spa owners
- 10 Arctic Spa Lunar FAQs
- 10.1 Is the Lunar a current Arctic Spa model?
- 10.2 What are the Lunar dimensions?
- 10.3 How much water does the Lunar hold?
- 10.4 How much does the Lunar weigh?
- 10.5 How many people fit in the Lunar?
- 10.6 Where can I find the Lunar manual or PDF?
- 10.7 What electrical service does the Lunar need?
- 10.8 Does the Spa Filter Adapter Kit v3 fit the Lunar?
Arctic Spa Lunar dimensions and capacity
| Series | Core Series |
|---|---|
| Model status | Current model |
| Dimensions | 84 × 84 × 39 in (213 × 213 × 99 cm) |
| Water capacity | 375 US gal (1,420 L) |
| Empty weight | 1,001 lb (454 kg) |
| Filled weight | 4,132 lb (1,874 kg) |
| Seats | 4 |
| Maximum capacity | 6 |
| Loungers | 1 |
| Jet options | 40 or 20 |
| Pump options | up to 2 |
The filled weight does not include people, steps, accessories, or snow. Have a qualified professional check any deck or raised platform before placing a filled spa on it.
Which Lunar specs does this guide cover?
The specs on this page are for the Lunar shown in Arctic Spas’ May 2026 brochure. Options and equipment can still vary by package and market. Check the serial plate and the manual that came with your spa before ordering a cover, pump, heater, or other year-specific part.
Lunar seating and layout
The Lunar has 4 molded seats and room for up to 6 people. It has one lounger. This is a six-person Core Series model with one comfort lounger and four defined upright seating positions.
If you are comparing models, pay attention to the footwell and lounger setup as much as the advertised capacity. A tub may technically hold the listed number of people but still feel tight once everyone is in it.
Jets and pump packages
Depending on the package and model year, the Lunar was offered with 40 or 20 jets and up to 2 pumps. Check the equipment label inside your cabinet before ordering a pump, heater, control panel, or electrical part.
Why the package matters: The 20-jet Prestige package uses one pump and qualifies for Plug N Play. The larger Signature package uses two pumps and the published 240V/50A supply.
Electrical requirements for the Lunar
| 240V wiring method | 240V fixed wiring from the GFCI spa panel: Line 1, Line 2, neutral, and equipment ground |
|---|---|
| Published feeder-wire guidance | The current Lunar page does not publish a feeder gauge; use its certification label and local code |
| GFCI breaker | 50A GFCI for the published 240V configuration |
| Published equipment input | The current model page does not publish a separate actual-load value |
| Heater | 4,000W on the published 240V configuration; no 120V heater output is published |
| Plug N Play | Available as a 120V Plug N Play upgrade in the May 2026 brochure |
| Plug-in electrical details | The brochure confirms the one-pump 120V upgrade, but the current model page does not state its breaker amperage or wire gauge. Use the factory cord and certification label; do not copy the 15A value from another model. |
| Spa disconnect | At least 5 ft (1.5 m) from the water, readily accessible, and within sight; within sight is generally no more than 50 ft under NEC terminology |
| Bonding conductor | At least No. 8 AWG solid copper to the local bonding grid in the United States, as required by the Arctic Spas manual and local code |
Breaker box and disconnect location: Arctic Spas says the GFCI disconnect must be readily accessible and visible to the hot tub occupant, but at least 5 ft (1.5 m) from the water. Under common NEC terminology, within sight generally means visible and within 50 ft, but the adopted code edition, amendments, product listing, and local inspector control the exact placement. The enclosure installed near the spa is commonly called the spa disconnect, GFCI spa panel, or spa subpanel.
Wiring and bonding: Arctic Spas requires a licensed electrician and local inspection. The certification label beside the controller determines the final voltage, actual load, breaker, and approved configuration. Where Arctic publishes a feeder gauge, it is shown in the model table; conductor insulation, terminal material rating, raceway, run-length adjustments, and local requirements still belong to the electrician. The manual calls for the spa bonding lug to connect to the local bonding grid with at least No. 8 AWG solid copper in the United States or No. 6 AWG stranded copper in Canada. Nearby metal equipment, enclosures, water pipe, conduit, and metal surfaces within 5 ft may also require bonding.
Plug-in configurations: The brochure confirms the one-pump 120V upgrade, but the current model page does not state its breaker amperage or wire gauge. Use the factory cord and certification label; do not copy the 15A value from another model. The manufacturer’s 5 ft appliance warning is not a complete receptacle-placement rule. Receptacle spacing, GFCI protection, cord length, and Plug N Play placement depend on the product listing and the NEC/CEC edition adopted locally.
Other electrical safety: The North American supply must include a suitable GFCI breaker that opens all ungrounded conductors. The load neutral must connect directly to the GFCI as shown in Arctic Spas’ licensed-electrician diagram. Never bypass the GFCI. The manual says no electrical appliance such as a light, phone, radio, or television may be within 5 ft (1.5 m) of the hot tub. Accessible controls or devices must meet the manual’s low-voltage and local-code requirements.
Will the Spa Filter Adapter fit the Lunar?
Our Spa Filter Adapter Kit v3 is made for matching 2020 or newer Custom Series Pro Filter setups. An Arctic Spa Lunar outside that setup should not be assumed to fit. If you are unsure what is in your tub, check the compatibility guide or send us a photo of the filter area before you order.
For any replacement filter, compare the cartridge height and diameter, the top and bottom openings, the thread style, and the space inside the filter housing. Those details matter more than the name printed on the side of the tub.
Lunar manuals and drawings
These links point to Arctic Spas’ official model pages, manuals, brochures, and technical drawings:
- May 2026 Arctic Spas brochure (PDF)
- Official Lunar model page
- Official Lunar technical specifications page
- Official equipment-location PDF
- Arctic Spas Plug N Play requirements
- Arctic Spas electrical safety and disconnect instructions
- Arctic Spas electrical installation instructions
The files stay on Arctic Spas’ website, so you will always be viewing the manufacturer’s copy rather than a PDF we downloaded and reposted.
Compare the Lunar with other Arctic Spa models
See every current and older Arctic Spa model in the main hot tub guide.
More help for Arctic Spa owners
- Compare Custom Series sizes and capacities
- Find the right replacement filter
- Check Spa Filter Adapter compatibility
- Look up an Arctic Spa error code
- View the Spa Filter Adapter Kit v3
Arctic Spa Lunar FAQs
Is the Lunar a current Arctic Spa model?
Yes. The Lunar is included in Arctic Spas' May 2026 hot tub brochure.
What are the Lunar dimensions?
The Lunar measures 84 × 84 × 39 in (213 × 213 × 99 cm). Before ordering a cover or building around the spa, measure your actual cabinet and check the model year on the serial plate.
How much water does the Lunar hold?
Arctic Spas lists the Lunar at 375 US gal (1,420 L). Older versions may hold a different amount, so use the manual for your year when adding water-care chemicals.
How much does the Lunar weigh?
The listed dry weight is 1,001 lb (454 kg), and the listed filled weight is 4,132 lb (1,874 kg). People, steps, accessories, and snow add more load, so have a qualified professional check any deck or raised platform.
How many people fit in the Lunar?
The Lunar is listed for up to 6 people, with 4 molded seats. It has one lounger.
Where can I find the Lunar manual or PDF?
Use the Arctic Spas links in the Manuals and drawings section above. Choose the document that matches your model year; a current brochure will not cover every part used in an older tub.
What electrical service does the Lunar need?
The published 240V installation is 240V fixed wiring from the GFCI spa panel: Line 1, Line 2, neutral, and equipment ground. Breaker guidance: 50A GFCI for the published 240V configuration. Published wire guidance: The current Lunar page does not publish a feeder gauge; use its certification label and local code. Available as a 120V Plug N Play upgrade in the May 2026 brochure. The certification label beside the controller is the final authority, and Arctic Spas requires a licensed electrician to follow local code.
Does the Spa Filter Adapter Kit v3 fit the Lunar?
Do not assume it does. The current kit is made for matching 2020 or newer Custom Series Pro Filter setups. Send us a photo of your filter area if you need help checking fit.
These specifications come from Arctic Spas’ model pages, brochures, technical sheets, and owner manuals. Direct links are provided above. Last updated July 11, 2026.
Arctic Spas is a trademark of its respective owner. SpaFilterAdapter.com is an independent aftermarket business and is not affiliated with, endorsed by, or approved by Arctic Spas.