Side-by-side on the specs that matter, with category winners and an opinionated take to help you decide.
This is a choice between a compact, nimble humidifier and a longer-running, bulkier one.
Pick the Smart Humidifier 311S 4L if your priority is a smaller footprint and easier placement in a tight space.
Pick the Smart Humidifier 813S 6L if you need to run for longer without refilling, favoring capacity over convenience.
Ask anything — we'll answer with Smart Humidifier 311S 4L and Smart Humidifier 813S 6L in mind for pro use.
Pindear may earn a commission when you buy through these links. Winners are determined by numeric spec comparisons only; non-numeric features (app quality, ecosystem, real-world feel) are covered in the verdict.
Ask me anything about smart hardware