The Invite™ is a four-person hot tub from the Fantasy Series, the entry-tier hydrotherapy line manufactured by Caldera Spas, a Watkins Wellness brand. Measuring 5'7" × 6'7" and holding 235 gallons of water, the Invite combines a built-in lounge seat with three additional seats and 25 jets across three configurations, packaged in the slimmest four-person footprint in the Fantasy lineup. It runs on a standard 115V outlet (with optional 230V conversion), uses a rotomolded unibody cabinet, and ships FROG® Sanitizing System Ready. The Invite lives up to its name, always warm and ready to welcome you in. The Invite is sold and serviced through Seven Seas Pools & Spas.
4 adults (includes lounge seat)
5'7" × 6'7" × 33" tall (170 × 201 × 84 cm), slimmest 4-person Fantasy spa
25 total (8 Ultra Mini, 13 Mini, 4 Twin Pulse)
2-speed 1.5 HP jet pump
The Invite fits couples or small families who need a four-seat spa with a lounger but only have a slim footprint to work with, narrow side yards, deep but tight patios, or backyards where a 6'6" square spa won't fit. The slim layout makes it work in tight spaces while still seating four adults comfortably. The 115V plug-and-play install (with 230V conversion option) keeps electrical complexity off the table for most owners. The experience is full-body relaxation with a focus on ease of use, exactly the kind of spa first-time hot-tub households tell us they wish they'd bought sooner.
Explore the Invite with Seven Seas Pools & Spas and compare the seating, massage, and water-care features in person.
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| Spa Specification | Details |
|---|---|
| Seating capacity | 4 adults (includes lounge seat) |
| Length × Width × Height | 5'7" × 6'7" × 33" (170 × 201 × 84 cm) |
| Water capacity | 235 gallons (900 liters) |
| Weight (dry) | 360 lbs (165 kg) |
| Weight (filled) | 3,020 lbs (1,385 kg) |
The Invite uses a single 2-speed 1.5 HP jet pump driving 25 jets across three patterns. The system is configured for a focused four-person experience rather than the higher-jet-count designs of the Entice® (33) or Bloom™ (40).
| Jet Type | Count | Targeted Area |
|---|---|---|
| Ultra Mini Jets | 8 | Fine, focused massage points |
| Mini Jets | 13 | Distributed back, shoulder, and side coverage |
| Twin Pulse Jets | 4 | Pulsing massage across primary contact points |
The Invite ships FROG® Sanitizing System Ready. Caldera's product copy describes the system this way: "Prefilled cartridges release sanitizing minerals and chlorine or bromine and self-regulate based on your spa's needs."
| Water Care Specification | Value |
|---|---|
| Standard system | FROG® Sanitizing System Ready |
| Filter | 50 sq. ft. cartridge |
| Ozone | Optional, Ozone Ready |
| Cover & Accessory Specification | Value |
|---|---|
| Cover | WeatherPro™ 4" Tapered Core with Hinge Seal; curved front skirt |
| Cover colors | Gray, Cocoa, Black |
| Cover lifter (optional) | Cover Rx |
| Steps (optional) | Roto Step, Brown or Gray |
The Invite is built around a lounge-anchored, four-seat soak in a slim footprint. The built-in lounger gives the primary soaker a body-length reclined position with jets across the back, hips, and calves, a posture that's hard to find at the entry tier in a 5'7"-wide spa. The three companion seats arrange around the perimeter so a household of four can share the spa, with the Ultra Mini Jets adding precision pressure, the Mini Jets distributing broader coverage, and the Twin Pulse Jets delivering pulsing rhythmic pressure across primary contact points.
Add the footwell multi-color LED, two external accent lights, and the integrated waterfall, and the evening soak shifts from purely functional hydrotherapy into entertainment territory. The rotomolded unibody construction keeps dry weight at 360 lbs, light enough that two-person delivery teams can position the spa in tight side yards without specialized equipment, which is part of why Caldera designed the Invite for "slimmer spaces."
Review the dimensions, seating layout, and water-care features with a Seven Seas advisor.
| Related Spa | Seats | Jets | Key Differentiator |
|---|---|---|---|
| Aspire® | 2 | 11 | Smallest Fantasy footprint, full lounge |
| Invite™ (this model) | 4 | 25 | Lounge seat in the slimmest 4-person Fantasy footprint |
| Entice® | 4 | 33 | Dedicated lounge with three jet types in 6'6" square |
| Bloom™ | 5 | 40 | Highest jet count in Fantasy, no lounger |
| Splendor® | 5 | 21 | Round, barrier-free seating with whirlpool feature |
The Fantasy Series sits at the entry tier of the Caldera Spas lineup. From entry to most premium:
Utopia® Series, premium top tier (EcoTech® Plus cabinet, FreshWater® IQ Salt, Atlas® Neck Massage, SpaGlo® Multi-Zone LED)
View Utopia Series Hot Tubs
Paradise® Series, mid-premium (FreshWater® Salt System Ready, EcoTech® cabinet, expanded jet ergonomics)
View Paradise Series Hot Tubs
Vacanza® Series, value-mid (FreshWater® Salt System Ready, EcoTech® cabinet, Mystique® LED)
View Vacanza Series Hot Tubs
Fantasy Series, entry tier (115V plug-and-play options, FROG® sanitization, rotomolded unibody cabinet). The Invite lives here.
View Fantasy Series Hot TubsIf you're cross-shopping Caldera against the Hot Spring brand (also distributed by Watkins Wellness), the Caldera vs Hot Spring comparison covers how the two lines split on jet technology, control systems, and water-care defaults.
The Invite is part of the lineup carried by Seven Seas Pools & Spas. Call ahead or stop by your local showroom to confirm current showroom availability. Visiting a showroom is the fastest way to gauge whether the slim 5'7" × 6'7" footprint fits your space and to test the built-in lounger. Call or visit your local Seven Seas Pools & Spas location to schedule a private wet-test soak appointment with the models currently on the floor.
The Invite is a 115V Plug-N-Play spa, the GFCI power cord is included, and a standard 15-amp exterior outlet on a dedicated circuit is the only electrical requirement. A 230V hardwire conversion is supported if you'd prefer faster heat-up and the higher 4 kW heater output. Site requirements:
Level concrete pad, deck, paver base, or prepared spa pad capable of supporting 3,020 lbs filled
18-24" minimum service clearance on at least one side for equipment access
Standard exterior 115V GFCI outlet within reach of the spa cord (or a hardwired 230V circuit if converting)
The 5'7" minimum dimension makes the Invite one of the few four-person spas Caldera builds that can fit through a standard 6' gate without disassembly. Seven Seas offers full delivery and installation service, including site assessment, GFCI verification, and post-fill water balancing.
Week-to-week maintenance reduces to inserting a fresh FROG® cartridge when prompted (typically every three to four weeks depending on use), checking the 50 sq. ft. filter monthly, and refreshing the water roughly every three to four months. The filter care guide and water care service in the owners area cover the full routine, and a separate winterizing guide addresses cold-weather draining if you don't run the spa year-round.
The Invite fits couples or small families who want a four-seat spa with a lounger but have a narrow or shallow footprint, narrow side yards, deep patios, or backyards where a square 6'6" spa won't fit. The Invite is purpose-built for slimmer spaces.
Caldera certifies the Invite to California Energy Commission (CEC) and APSP 14 standards, a useful efficiency proxy if you live elsewhere. Actual monthly electrical cost depends on your local utility rate, ambient temperature, soak frequency, and whether you run the heater on 115V (1 kW) or convert to 230V (4 kW). With 235 gallons of water, the Invite heats and re-heats faster than larger Vacanza or Paradise models. Ask a Seven Seas advisor for an operating-cost estimate based on your climate and electricity rate.
Yes, that's the headline buying advantage. The Invite ships with a GFCI power cord that plugs into a standard 115V outlet on a dedicated 15-amp circuit. Caldera's product page states: "No special wiring. No added plumbing. Just fill your spa, plug it into a standard 115V outlet." No electrician is required for most installations, confirm your outlet is on a dedicated circuit and protected by a GFCI breaker.
On 115V, the heater runs at 1 kW. Convert to a 230V hardwired connection and the heater steps up to 4 kW, heat-up time drops significantly, and the heater can run while the jets are on high. The conversion requires a licensed electrician and a dedicated 230V circuit. Most Invite owners stay on 115V because the convenience outweighs the longer heat-up.
No. The Invite is FROG® Sanitizing System Ready, a cartridge-based system that releases sanitizing minerals and either chlorine or bromine. Salt-water sanitization (the FreshWater® Salt System or FreshWater® IQ) starts in the Vacanza® Series and above. See the salt-water care guide for the broader trade-off.
Yes, a WeatherPro™ 4" Tapered Core cover with a hinge seal and curved front skirt is included. Cover colors: Gray, Cocoa, Black. The optional Cover Rx lifter is available.
Caldera does not publish a single warranty page on the product page itself. Seven Seas walks every Invite buyer through the current Caldera warranty document at the time of sale, generally a multi-year shell warranty plus shorter components and labor terms. Ask for the latest warranty PDF when you visit a showroom.
Yes, with proper planning. The Invite's slim 5'7"-wide footprint, light dry weight, and 115V operation make it one of the more realistic indoor-install candidates in the Fantasy lineup. Indoor installations require a moisture-resistant floor structure rated for 3,020 lbs filled, active humidity ventilation, and floor drainage planning.
The Invite is part of the lineup carried by Seven Seas Pools & Spas. Call ahead or stop by your local showroom to confirm current showroom availability. Visiting a showroom is the fastest way to gauge whether the slim 5'7" × 6'7" footprint fits your space and to test the built-in lounger. Call or visit your local Seven Seas Pools & Spas location to schedule a private wet-test soak appointment with the models currently on the floor.
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