Knox vs Lennon Sauna: Indoor Infrared vs Outdoor Cube
By Backyard Discovery | Swing Sets, Pergolas, Outdoor Kitchens | Published: 2026-10-26
Category: Comparisons
Compare the Knox 2-person indoor infrared sauna with the Lennon 4-6 person outdoor cube sauna to find the right fit for your space, heat style, and routine.
Quick Answer
Choose the Knox Indoor Infrared Sauna if you want a quick-heating, plug-in sauna for two without electrical work. Choose the Lennon Outdoor Cube Sauna if you have outdoor space and want a larger, traditional cedar sauna with a porch for up to six people.
Heat style and experience
The Knox uses eight infrared heater panels that heat up quickly and deliver full-body coverage, making it a good choice for shorter sessions. In contrast, the Lennon is a traditional cedar sauna with a PrairieFire™ 9kW heater that preheats fast, and it offers a two-tier bench so you can choose a hotter upper seat or a milder lower one.
If you prefer the penetrating warmth of infrared and a quick start, the Knox matches that routine. If you like the classic steam-and-wood experience of a Finnish-style sauna with adjustable heat zones, the Lennon delivers that.
Setup and space requirements
The Knox plugs into a standard 120V outlet and requires no electrician, so it can be set up in a bedroom, home gym, or even a shared living space. The Lennon is an outdoor unit with a steel roof and tongue-and-groove cedar construction, designed to withstand the weather, but it needs a suitable outdoor location and likely a dedicated electrical circuit for the 9kW heater.
If you rent or want minimal installation, the Knox is the lower-friction option. If you own your home and have a backyard spot, the Lennon becomes a permanent outdoor feature.
Capacity and privacy
The Knox is a 2-person sauna with a bench you can share side by side, and its tinted 8mm tempered glass provides privacy even in an open floor plan. The Lennon is the largest cube sauna in its lineup, seating 4-6 people with stacked two-tier benches and a covered porch with built-in seating for cooling down.
Think about whether you’ll mostly use the sauna alone or with a partner, or if you want to host family or friends. The Lennon’s extra capacity and porch make it more of a social space, while the Knox is more intimate.
Trade-Offs at a Glance
- Heat-up time: The Knox’s infrared panels heat up quickly, while the Lennon’s 9kW heater is also built for fast preheating. Both are fast, but infrared may feel more immediate.
- Setup complexity: The Knox plugs into a standard 120V outlet with no electrician, while the Lennon is an outdoor unit that likely needs a dedicated circuit and weatherproof placement. If you want the simplest setup, the Knox wins.
- Space and capacity: The Knox seats two side by side; the Lennon seats 4-6 with two-tier benches and a porch. Choose based on how many people you plan to host. Measure your space and think about guest count before deciding.
- Privacy and location: The Knox’s tinted glass offers privacy indoors, while the Lennon’s outdoor placement means you’ll be visible to neighbors unless you add screening. Consider your yard’s sightlines and your comfort with being seen.
- Experience style: Infrared (Knox) delivers penetrating warmth; traditional cedar with a heater (Lennon) gives a classic sauna feel with hotter upper benches. Try both if you can, or think about which heat sensation you prefer.
Product Facts
- Lennon Outdoor Cube Sauna with Porch – 4-6 Person: The Lennon Outdoor Cube Sauna has stacked two-tier benches, a covered porch with built-in seating, and a PrairieFire™ 9kW heater that preheats fast. This lets you choose your heat level and cool down comfortably outdoors, making it ideal for longer, social sessions.
Lennon Outdoor Cube Sauna with Porch – 4-6 Person - Knox Indoor Infrared Sauna – 2 Person: The Knox Indoor Infrared Sauna uses eight infrared heater panels, plugs into a standard 120V outlet, and features tinted 8mm tempered glass for privacy. It heats quickly, needs no electrician, and fits discreetly into indoor spaces, so you can start using it almost immediately.
Knox Indoor Infrared Sauna – 2 Person
Which Sauna Fits You?
Best for
- Renters or anyone who wants a plug-and-play sauna indoors without electrical work
- Couples or individuals who want quick, private sessions with infrared heat
Not for
- Those who need to seat more than two people or want a traditional outdoor sauna experience
- Anyone without a suitable outdoor space or the ability to install a dedicated circuit for a 9kW heater
