Sun Home manufactures the saunas and cold plunges named in this guide. Specifications and prices were checked against the sources named in the Methodology and Sources section on September 22 and 23, 2026; "not found" means the figure was not found in those sources on those dates, not that it does not exist. Figures are labeled manufacturer specification, calculated from stated inputs, or illustrative assumption where the difference matters.
Short Answer
A sauna supports a flat lie-down only when its usable bench fits your full body length and width without entering heater clearances. Sun Home's published information does not yet verify that fit for every model. Compare measured bench dimensions, and distinguish a flat position from a knees-bent or supported recline before choosing a cabin.
Key Takeaways
- Bench length is the number that matters, and it is different from interior length. Sun Home publishes bench dimensions for the Equinox 2 and 3, the Solstice 1, 2, 3 and 4 and the Luminar 5; for the Eclipse, Pod, Nova and Solaris the bench length was not found in the pages checked.
- The longest published straight bench is the Luminar 5's 59 in primary segment, with a 44 in return forming an L. The two segments are separate lengths; they do not add into one lie-down length. The Solstice 4's L-shaped bench is listed at 74.6 in without segment lengths, so its straight run is unverified.
- No adult flat lie-down is verified from published figures alone, so this is a bench-fit planning guide: it tells you what to measure on yourself and what to request from Sun Home before treating any model as a confirmed fit.
- Three postures, three verdicts: flat (full body length on one straight segment), knees-bent recline (torso on the bench, feet on the floor or return), and seated recline against a backrest. Ask which one you actually want.
- Any allowance you add (2 in in the examples below) is an editorial comfort allowance, not a safety standard; heater clearances from the manual are separate and come first.
Published Bench Dimensions by Model
| Model | Straight usable bench length | Bench depth | Bench height | Obstructions noted | Posture supported by the published figures | Evidence status (source, date) |
|---|---|---|---|---|---|---|
| Luminar 5 | 59 in primary segment; 44 in return (L-shaped, listed separately) | 20 in | Not found | Full-spectrum heaters on the glass wall; corner where the segments meet | Seated use supported by the published dimensions; knees-bent recline along the 59 in segment for an occupied torso-plus-thigh length within it; flat only for an occupied length of 57 in or less with the 2 in allowance. No posture is verified by measurement | Manufacturer specification, Sun Home Luminar page, September 22, 2026 |
| Equinox 3 and Solstice 3 | 56.6 in | 20.2 in | 19.5 in | Wall heaters at bench ends; bench is a single straight run | Knees-bent recline; flat only for an occupied length of 54.6 in or less with the allowance | Manufacturer specification, Equinox and Solstice help centers, September 22 and 23, 2026 |
| Equinox 2 and Solstice 2 | 45.2 in | 20.2 in | 19.5 in | Same | Seated; knees-bent recline only for shorter users (occupied torso length under about 43 in) | Manufacturer specification, same sources |
| Eclipse 2 | Not found (benches removable) | Not found | Not found | Interior 42.8 x 42.2 x 71.5 in; calf and floor heaters | Unverified; interior length caps any bench at under 42.8 in | Interior figures: manufacturer specification, Eclipse help center and product page, September 23, 2026 |
| Eclipse 4 | Not found (benches removable) | Not found | Not found | Interior 85.7 x 50 in; height 71.5 in; front-mounted red light towers | Unverified; the 85.7 in interior length makes a flat lie-down geometrically possible but no bench figure supports it | Interior figures: manufacturer specification; request the bench drawing |
| Solstice 1 and Solstice 4 | Solstice 4: 74.6 in, L-shaped (segment lengths not listed); Solstice 1: 32.1 in | 20.2 in | 19.5 in | Solstice 4 interior width 74.8 in (80.9 in exterior) | Unverified | Solstice product pages, September 23, 2026 |
| Pod | Not found | Not found | Not found | Interior about 35.4 in diameter | Seated single-person capsule; a lie-down is not the design intent | Interior figure: dealer listing; confirm with Sun Home |
| Nova 3 and 6, Solaris 4 | Not found | Not found | Nova: 17 in lower, 34 in upper; Solaris: not found | Stone heater with a guard; Solaris bench levels not published | Unverified | Product pages, September 22, 2026; request bench drawings |
"Not found" means the figure was not in the Sun Home pages checked on the stated dates. It does not mean the bench is too short; it means the fit is unverified until Sun Home supplies a measured drawing.
How to Measure Your Lying Position
- Lie on the floor in the posture you intend to use: flat with feet relaxed, or knees bent with feet flat.
- Have someone mark the furthest points of your body in that posture (head to heels or head to feet) and the widest points (elbows or shoulders). Measure the length and width of that footprint. This replaces any head-to-knee estimate; the feet and the resting position of the arms are part of the space you occupy.
- Compare the length with the straight bench segment you would use. If you want an allowance, add 2 in and call it what it is: an editorial comfort allowance. Apply it consistently: a 56.6 in bench minus 2 in leaves 54.6 in, which fits an occupied length of 54.6 in, not a person of a given standing height.
- Compare the width with the bench depth (20 to 20.2 in on the published benches). A flat back needs the shoulders on the bench; a side-lying posture needs less.
- Keep the manual's heater clearances between your body and any heater surface; they are separate from the comfort allowance.
Height-specific examples (calculated from the method above)
- A person whose flat occupied length measures 62 in does not fit flat on any Sun Home bench with a published straight length; a knees-bent recline on the Luminar 5's 59 in segment or the Equinox 3's 56.6 in bench depends on their torso-plus-thigh length, which they measure the same way.
- A person whose flat occupied length measures 56 in fits the Luminar 5's 59 in segment flat with the allowance and the Equinox 3's 56.6 in bench without it.
- A child or small adult at 50 in fits either flat; a bench 20 in deep still needs the shoulders measured against it.
Flat Versus Knees-Bent Versus Seated Recline
| Posture | What the bench must provide | Where the published figures get you |
|---|---|---|
| Flat | One straight segment at least your occupied length; depth at least your shoulder width; clearances kept | Of the benches with a published straight length, only the Luminar 5 (59 in) and Equinox 3 or Solstice 3 (56.6 in) approach adult lengths, and only for occupied lengths at or below those figures |
| Knees-bent recline | Torso and thighs on the bench, feet on the floor or on the L return | The Luminar 5 (59 in) and the Equinox 3 or Solstice 3 (56.6 in) offer the longest segments; whether your torso-plus-thigh length fits is your measurement to make, not a verdict published here |
| Seated recline | Backrest and enough seat depth; no length requirement | Any model; see the seated-fit guide for headroom and knee space |
Model-Specific Notes
- Luminar 5: the L layout means a reclining occupant uses the 59 in segment and the corner; do not assume other bathers fit around them on the return without measuring the remaining 44 in.
- Eclipse 2 and 4: the benches are removable, which Sun Home describes as freeing floor space for yoga or stretching. That is floor use, not a bench lie-down, and a removable bench's height is whatever the fixed setting is; nothing published says it adjusts.
- Nova and Solaris: traditional cabins with stone heaters have a heater guard and hot-zone clearance that reduce usable bench length near the heater; request the bench drawing and the clearance from Sun Home.
Ordering Checks
- Your measured occupied length and width for the posture you want.
- The straight bench segment length, depth and height for the exact model and version, from the manual or a dimensioned drawing supplied by Sun Home support.
- Heater clearances from the manual.
- Whether anyone else needs to sit while you recline, and where.
Bottom Line
On published figures, the Luminar 5 (59 in) and the Equinox 3 or Solstice 3 (56.6 in) are the Sun Home benches with a published straight length long enough to consider for a recline, and neither is a verified flat fit for a typical adult. Measure your own occupied length, treat "not found" as unverified rather than unsuitable, and ask Sun Home for a measured bench drawing before ordering for a lie-down.
Frequently Asked Questions
Can I lie flat at my height?
Standing height is not the test; your measured occupied length in the posture you want is. Compare it with the straight bench segment: 59 in on the Luminar 5, 56.6 in on the Equinox 3 and Solstice 3, 45.2 in on the Equinox 2 and Solstice 2.
Can an L-shaped bench be used as a straight bench?
Only along one segment. The Luminar 5's 59 in and 44 in segments meet at a corner and cannot be added together.
Does the Eclipse 4 have a measured lie-down area?
Not in the pages checked. Its 85.7 in interior length makes a lie-down geometrically possible, but the bench dimensions are not published. Request the drawing.
Can another person sit while I recline?
Only if the remaining bench length fits them. On the Luminar 5 that is the 44 in return; on a single straight bench it is whatever is left beyond your occupied length.
Methodology and Sources
Bench and interior dimensions were read on Sun Home's product and help-center pages on September 22 and 23, 2026, updated to Sun Home's current product record, and are labeled manufacturer specification; figures not found there are marked unverified rather than absent. The 2 in allowance is an editorial comfort allowance. No fit on this page is presented as tested; the site's separate seated-fit guide covers headroom and legroom. Sun Home manufactures the cabins named.
- Sun Home Equinox help center (bench and interior dimensions)
- Sun Home Solstice help center (bench and interior dimensions)
- Sun Home Eclipse help center (interior dimensions)
- Sun Home Luminar (L-shaped bench dimensions)
- The Good Trade: Sun Home Luminar review (published in partnership with Sun Home)