1-Person vs 2-Person Infrared Saunas: Who Needs Which

By Telos Wellness Editorial Team. Last reviewed 29 June 2026.

A 1-person infrared sauna suits a single occupant who wants the smallest footprint, the lowest electrical demand and the highest weekly frequency. A 2-person infrared cabin suits a household where two adults may share a session occasionally or where a single user prefers the wider bench. The footprint difference is typically 350 mm of width and the electrical draw rises by 400–600 W, which usually changes the required UK circuit.

The footprint comparison against UK room dimensions

A 1-person infrared sauna and a 2-person infrared sauna differ in three measurable ways: footprint, electrical draw and price. The 1-person cabin is typically 900 × 1,000 mm; the 2-person cabin is typically 1,200 × 1,050 mm. The 1-person draws 1.5–1.8 kW; the 2-person draws 1.6–2.4 kW. The 1-person sits at £1,800–£2,400 RRP in the UK; the 2-person at £2,500–£3,500. All three figures favour the 1-person for solo use; the 2-person earns its place only when sharing is genuinely planned.

Typical internal dimensions (mm × mm)

External dimensions are the constraint for placement; internal dimensions are the constraint for comfort. A 1-person cabin with 900 × 1,000 mm external dimensions typically offers an internal bench width of approximately 760 mm — comfortable for a single occupant up to about 1.85 m height. A 2-person cabin with 1,200 × 1,050 mm external dimensions typically offers approximately 1,100 mm of internal bench width, which is the practical minimum for two adults seated comfortably side by side. Cross-referenced against typical UK room dimensions — a small ensuite at 2,200 × 1,800 mm, a small spare bedroom at 3,000 × 2,400 mm, or a single garage at 2,500 × 5,000 mm — both sizes are accommodated, but circulation space differs.

Door clearance and access requirements

The UK internal door clearance standard is 762 mm. Cabins ship in flat panels and assemble in situ, so the largest single panel dimension is the constraint during delivery rather than the assembled cabin footprint. The Telos Wellness install logs (S019) record approximately 6 per 100 deliveries facing a doorway-clearance issue at first attempt, typically on tight stair turns or narrow internal hallways. Measuring access ahead of order is the most reliable way to avoid a re-delivery charge.

Electrical draw and circuit reality check

Most 1-person infrared saunas in the UK run from a standard 13A socket on a dedicated circuit. The 2-person cabin is on the edge: cabins drawing 2.0 kW or less typically run on 13A, while those drawing 2.2 kW or more should be wired to a 16A commando socket to stay within Approved Document P (S016[1]) and BS 7671:2018+A2:2022 (S017[2]) margins. The manufacturer's data sheet confirms the required circuit.

13A standard socket compatibility

A standard UK 13A socket on a dedicated circuit comfortably carries a steady-state load up to approximately 2.0 kW. A 1-person infrared cabin drawing 1.5–1.8 kW falls well inside that envelope and runs from a dedicated 13A socket without modification. The dedicated-circuit requirement matters: sharing the same ring main with other heavy appliances (kettle, washing machine, electric heater) is not advised because the additive load risks tripping the breaker.

When 16A or 32A becomes necessary

A 16A commando socket becomes necessary when the cabin's steady-state load exceeds 2.0 kW. Most 2-person carbon-panel cabins drawing 2.2–2.4 kW fall into this bracket, as do 3- and 4-person cabins drawing up to 3.0 kW. A 32A hardwired connection becomes necessary at draws above 3.6 kW, which is rare in the infrared segment but standard for traditional sauna heaters at 6 kW or above. All installations must be certified under Approved Document P by a Part P registered electrician. Wider buyer context is in the Telos infrared saunas UK buyer's guide.

kWh per session at the April 2026 Ofgem cap

A 1-person infrared sauna uses approximately 0.9–1.1 kWh per 40-minute session at the Ofgem April 2026 cap of 27.03p/kWh, costing approximately £0.24–£0.30. A 2-person infrared cabin uses approximately 1.2–1.6 kWh per session, costing approximately £0.32–£0.43. Across 100 sessions per year that is a £8–£13 annual differential — small enough that the capacity decision should rest on footprint and weekly use pattern rather than running cost.

The Ofgem April 2026 cap stands at 27.03p/kWh for the variable unit rate. At 100 sessions per year the 1-person cabin runs at approximately £24–£30 annually; the 2-person at approximately £32–£43. The running-cost differential of roughly £10 per year is small relative to the £700–£1,100 capex differential and the 25% footprint increase. The capacity decision should therefore rest on physical and behavioural factors, not on electricity bills. Detailed amortisation maths is covered in the Telos infrared sauna cost guide.

Single-occupancy frequency data from Telos install logs

Most buyers should not buy a larger infrared sauna than the use case requires. Telos Wellness install logs from 2021–2026 (S019[3]) record that approximately 70% of cabins used three or more times per week are used solo, regardless of the rated capacity. Buying a 2-person cabin for hypothetical sharing inflates the footprint by 25%, raises the kWh bill by 15–25%, and typically leaves one seat unused on most sessions.

The 70% solo-use finding is consistent across the 1-person and 2-person Telos register, drawn from customer-completed use surveys and warranty-renewal questionnaires. The pattern is intuitive: high-frequency users build the cabin into a personal routine — often early morning, late evening, or post-workout — that does not naturally coincide with a partner's schedule. Couples sharing a cabin tend to do so at lower overall frequency, typically 1–2 sessions per week, where ritual and shared time are part of the appeal.

When the 2-person cabin is the right choice

The 2-person cabin earns its place in three identifiable scenarios. First, two adults who genuinely will share at least once per week and have made a household decision to do so. Second, a single user above 1.85 m height who finds the 1-person bench cramped at the shoulders or knees and wants the wider 1,100 mm internal bench. Third, a household with a spare bedroom or garage where footprint is not the binding constraint and the £700–£1,100 capex differential is acceptable. Where none of these three apply, the 1-person cabin is the more rational purchase.

When the 1-person cabin is the right choice

The 1-person cabin is the right choice for a single-user household, for tight footprint constraints (ensuite, narrow spare room, single garage with stored items), and for any buyer whose weekly use target is three or more sessions. Daily-use compliance is materially easier when the cabin warms up in 10–12 minutes from a 13A socket without requiring a Part P notifiable electrical upgrade. The 1-person cabin's smaller footprint also leaves more room for the cool-down chair, towel rail or shower transition that often sits adjacent to the cabin.

Resale liquidity by size

On the UK secondary market the 2-person infrared cabin is more liquid than the 1-person — it sells faster on Gumtree and eBay listings — but at a higher absolute price tag. The 1-person cabin clears at a lower price and at a slower rate. In percentage terms, both sizes depreciate similarly across five years of normal indoor use, typically retaining 40–55% of original RRP at the 5-year mark. Resale value should not be the primary driver of size choice because the percentage depreciation is broadly comparable; the buyer is better served by sizing the cabin to current use.

The "big enough for two" qualitative test

The qualitative test for whether a "2-person" cabin is genuinely big enough for two adults is internal bench width. The minimum is approximately 1,100 mm — enough for two adults to sit shoulder-to-shoulder without ongoing contact, with each occupant facing the cabin emitters squarely. Cabins marketed as "2-person" with internal bench width under 1,000 mm should be treated as 1.5-person: comfortable for one adult with extra elbow room rather than two adults sharing. The cabin specification sheet states internal dimensions; the buyer should confirm before ordering.

Frequently asked questions

Is a 2-person infrared sauna better than a 1-person?

Better depends on use. A 2-person cabin gives wider bench space and the option to share, but increases footprint by approximately 25%, raises power draw enough to often require a 16A circuit rather than a 13A socket, and adds £700–£1,100 to the RRP. Telos install-log data (S019) shows approximately 70% of frequent users use the cabin solo regardless of rated capacity, which weakens the case for the larger size unless sharing is genuinely planned.

Will a 2-person infrared sauna fit in a small UK room?

A typical 2-person infrared sauna footprint is 1,200 × 1,050 mm. A small UK ensuite (2,200 × 1,800 mm) accommodates the cabin but leaves limited circulation space. A small spare bedroom (3,000 × 2,400 mm) accommodates the cabin comfortably. The constraint is internal door clearance during delivery — most cabins ship in flat panels and assemble in situ, so the constraint is final position rather than delivery clearance. Confirm against the model's specification sheet.

Can a 1-person infrared sauna run from a standard 13A socket?

Yes, almost always. A 1-person infrared sauna typically draws 1.5–1.8 kW and runs from a dedicated 13A socket. The dedicated circuit must be certified under Approved Document P (S016) and wired to BS 7671:2018+A2:2022 (S017). Sharing a socket with other heavy loads is not advised. The 2-person cabin often crosses the 2.0 kW threshold above which a 16A commando socket is preferable.

How much electricity does each size use?

At the Ofgem April 2026 cap of 27.03p/kWh, a 1-person infrared sauna uses approximately £0.24–£0.30 per 40-minute session. A 2-person cabin uses approximately £0.32–£0.43 per 40-minute session. Across 100 sessions per year, the 2-person costs £8–£13 more than the 1-person. The running-cost differential is small enough that the size choice should be driven by footprint and weekly use pattern, not electricity cost.

Should a single user buy a 2-person sauna anyway?

Generally no, on the install-log evidence. Buying a 2-person cabin for hypothetical future use inflates footprint, raises power draw, and most often leaves the second seat unused. Telos Wellness install logs (S019) show that solo use dominates among frequent users. The exception is a single occupant above 1.85 m height who wants the wider bench, or a household where a partner has stated a clear intention to share.

Which size has better resale value?

On the UK secondary market, 2-person infrared cabins sell faster but at a higher absolute price; 1-person cabins sell slower at a lower price. Both sizes depreciate by a similar percentage across five years of normal use. Resale value should not drive the purchase decision: the percentage depreciation across the two sizes is comparable.

What is the minimum internal width for two adults to share comfortably?

The minimum internal bench width for two adults seated side by side is approximately 1,100 mm. Cabins marketed as "2-person" with internal bench width under 1,000 mm should be treated as 1.5-person — comfortable for one adult with extra space rather than two adults sharing. The cabin's specification sheet states internal dimensions; confirm before ordering.

Are there 3- and 4-person infrared saunas worth considering?

The 3-person cabin (typically 1,500 × 1,200 mm, drawing 2.2–2.6 kW) and 4-person cabin (typically 1,800 × 1,500 mm, drawing 2.6–3.0 kW) are appropriate where a family expects to share sessions routinely. Both sizes require a 16A or 32A circuit certified under Approved Document P (S016). Below routine three-person use, the smaller size delivers better warm-up speed and lower running cost.

References

1. UK Building Regulations Approved Document P (Electrical Safety — Dwellings), 2013 ed. (S016)
2. BS 7671:2018+A2:2022 Wiring Regulations. (S017)
3. Telos Wellness internal install logs, 2021–2026. Primary data. (S019)