SaunaLife G4 | Traditional Outdoor Sauna · 6-Person

The SaunaLife G4 was a 6-person traditional outdoor sauna kit built from interlocking 1.77" Nordic Spruce wall beams, with a full-glass front, a side window that could be installed on either side, two-tier knotless Aspen benches and a single-pitch roof over a built-in front porch. The room inside measured 78.5" W × 78.5" D with a ceiling running from 92" at the front to 82.5" at the back, giving a stated interior volume of 311 cu ft. The kit shipped flat-packed at a listed 1,650 lbs. The sauna heater was always chosen separately.

The G4 was the modular cabin of the Garden-Series: rather than planks stacked on corner posts, the walls were interlocking beams 1.77" thick assembled like log-cabin joinery, and the base extended forward into a porch about 16.5" deep. Three of its four glazed elements were reversible or repositionable — the door could be hung on either side and the side window installed in either flank — which is why SaunaLife described it as configurable to the yard rather than to a fixed orientation.

How the SaunaLife G4 was built

• Interlocking spruce wall beams: Nordic Spruce beams in a 1.77" × 5.12" profile, machined so each course keys into the one below and the wall can expand and contract without opening a gap.
• Glazed front and side window: the manual's parts list carries one glass door at 31.5" W × 74.8" H and two glass window panels at 30.1" W × 74.8" H each, all 5/16" tempered. SaunaLife's own description calls the result a full-glass front plus a side window, with the side window installable on either flank.
• Two-tier knotless Aspen benches: an I-shaped bench layout with 1.1" knotless Aspen tops, backrests and skirting, so bathers could sit on the hotter upper tier or the cooler lower one.
• Single-pitch roof: spruce roof boards over purlins, covered with the asphalt roofing supplied in the kit, sloping from the front down to the back.
• Front porch: the treated ground frame extended forward about 16.5" and was decked with terrace floor boards, giving a covered step into the sauna.
• Wi-Fi LED lighting: a low-voltage dotless white LED bar rated IP67 for heat and water, controlled from a phone app or the included handheld remote.

What came with the SaunaLife G4?

The SaunaLife G4 shipped as a complete sauna room kit with everything except the heater: the interlocking spruce wall beams, the prefabricated door and window elements, the treated ground frame, floorboards, roof boards, the asphalt roof kit, exterior trim, the knotless Aspen benches, backrests and skirting, the terrace floor boards, the LED lighting system, a bottle of sauna wood paraffin oil, all fasteners and the installation manual. The heater, its controls, the sauna stones and the electrical work were not included.

Included in the kit

• Premium Nordic Spruce wall beams, 1.77" × 5.12" profile
• Prefabricated window and door elements, 5/16" tempered glass
• Treated ground frame and floor beams
• Nordic Spruce floorboards and roof boards, with purlins
• Terrace floor boards for the front porch
• Benches of grade-A knotless Aspen, 1.1" thick tops
• Backrests of grade-A knotless Aspen, plus skirting
• Asphalt roof covering kit
• Exterior trim and floor strips
• Air exhaust vent with ventilation cover
• White LED light bar with Wi-Fi app control and handheld remote
• Sauna wood paraffin oil, 16.9 oz (500 ml)
• Fasteners, assembly kit and installation instructions

Not included — ordered or arranged separately

• Sauna heater, its control unit and sauna stones
• Electrical circuit and connection by a licensed electrician
• The foundation: a stable, level concrete pad, paver base or reinforced deck
• Assembly tools and labour, including a saw for the on-site cuts
• Wood preservative for the annual exterior treatment

Did the SaunaLife G4 include a heater?

No. The G4 was a sauna room kit, so the heater, its control unit and the sauna stones were chosen separately. The packages that were paired with it on this page were the Saunum Air L, the HUUM HIVE Mini 10.5 kW, the Harvia Virta 10.5 kW and the Harvia PRO 20 24 kW wood-burning stove kit. If you own a G4 and are replacing its heater, note that the 10.5 kW HUUM HIVE Mini is documented by HUUM for rooms of 354–566 cu ft while the G4's stated interior volume is 311 cu ft — contact us with your room's measurements and we will size a replacement against the manufacturer's own range rather than against the old pairing.

How was the SaunaLife G4 assembled?

The G4 was a two-person, two-day structural build on a prepared foundation, with the electrical work left to a licensed professional. The wall beams were driven home course by course with a hammer and hammer block, the purlins and gable parts screwed on, then the roof boarded, covered with the supplied asphalt roofing and trimmed. Every screw went into a pilot hole drilled first, and the manual's own note on the first page is "Read the entire manual before assembly. Get the tools you need."

It was not a no-cut kit. The manual instructs the builder to cut the last roof board to the correct width, cut the frontboards to length, cut the gableboards to the correct angle, cut the final floor and terrace board to width, and cut the floor strips to size, so a saw was needed throughout the build. SaunaLife's Garden-Series owner instructions say to hire qualified professionals for electrical work, including heater and lighting installation, so the heater, its control unit and the LED lighting were wired by an electrician, not by the owner.

If you are rebuilding or re-siting a G4

Set the base frame out from the ground-frame and floor-beam parts listed in the manual rather than from a published footprint figure: SaunaLife's published depth figures for the G4 do not agree with one another, which is why the specification above gives the exterior width and not the depth, and the manual's parts list is the only source you can measure against. The manual also specifies that the first wall plank must sit 0.39" above the edge of the base frame and be screwed down to it, that the diagonals must measure equal before the walls go up, and that the door and window elements are fixed to the house only through their slats — never screwed to the wall beams, because the wall has to be free to move.

Keeping a G4 in good order

SaunaLife's owner guidance for the Garden-Series is to treat all wooden components with a wood preservative and to re-apply it at least once a year, to improve resistance to dirt and moisture. Wipe the benches with a damp cloth rather than running water over them, run the heater for about 30 minutes afterwards with the vent open to dry the room, and once a year check the bench and support fixings for screws that heat cycling has loosened. Avoid paints, varnishes, harsh disinfectants and pressure washers. Wood may crack or warp slightly with the temperature and humidity swings a sauna goes through; SaunaLife says so itself, and it is normal.

How is the SaunaLife G4 delivered?

The SaunaLife G4 ships by LTL freight. The listed shipping weight is 1,650 lbs, and delivery is curbside with the shipment lowered to ground level on a pallet. A delivery appointment is required. Buyers should plan how the sauna components will move from the curb to the prepared installation area before the truck arrives.

The carrier will reach out to book the appointment once the shipment arrives at their local terminal, and someone needs to be there to inspect and sign for it. The sauna arrives protected on a wooden pallet, sometimes encased in wood.

Inspect and photograph the shipment before you start assembly. SaunaLife's warranty does not cover damage — transport damage included — that would have been detectable by visual inspection before installation, so documenting it at delivery is what keeps both the freight claim and the warranty open.

Where is the SaunaLife G4 installation manual?

The SaunaLife G4 installation manual stays available here for owners: it carries the full parts list with every beam length, the 16-step build sequence and the door and window fitting details.

SaunaLife G4 installation manual (PDF)