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The Serene House Nexus is a small plug-in ultrasonic diffuser in a silver metal body, about 5.6 inches tall and 3.5 inches wide. It runs continuously or on an intermittent cycle, has a timer, a changing LED light, and shuts off automatically when the water runs out. It is meant for rooms up to about 150 square feet, so a bedroom or small office rather than an open living space. The best new price is $39.99 at Amazon as of November 8, 2026, with 3 stores listing it new.
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Lowest price we've seen: $39.99 on Nov 8 at Sabavi Home. Tracked across 3 stores since Nov 8.
Owner feedback on the Nexus line is limited but generally positive on looks and ease of use. Buyers tend to like the metal finish and the auto shut-off, and some find the light and small tank the main drawbacks.
