Clearlight Premier IS-2 both scores highest and costs the least here — a clear pick unless a specific rival spec matters more to you.
| 2 products | ![]() Redwood Outdoors Redwood Outdoors Cabin Outdoor 4-Person | ![]() Clearlight Clearlight Premier IS-2 |
|---|---|---|
| Price | $7,299 | $5,799 |
| Overall score | 7.4 | 8.7 |
| Type | Traditional electric (dry heat or steam over rocks) | Far-infrared |
| Heater power (kW) | 6kW Harvia KIP included; 8 upgrade options up to 9kW | ~2.2 kW |
| Max temperature (°F) | — | 125–145 °F |
| Capacity (persons) | 4 persons | 2 persons |
| Voltage | 240V heater, 120V lighting | 120V / 20A (config) |
| Amperage (A) | 30A (6kW base) / 40A (8kW upgrade) | 20 A |
| Wood | Canadian Thermowood (heat-treated hemlock), FSC-certified | Cedar or basswood |
| Warm-up time (min) | — | 20–30 min |
Redwood Outdoors
Best for Families wanting 4-person capacity in a small backyard
Clearlight
Best for Best-value indoor infrared from a trusted brand
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