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The Stiebel Eltron CNS 150-1 Plus is a 1000 W wall-mounted convection heater for rooms up to about 150 sq. ft. It heats silently by natural convection, has a built-in thermostat adjustable from 41°F to 86°F, a timer and a 45°F frost-protection setting. Its slim 3½-inch-deep white steel case replaces a baseboard heater with far less floor space. The best new price is $269 at Amazon as of November 5, 2026, with two stores listing it new.
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Lowest price we've seen: $269.00 on Nov 6 at Amazon. Tracked across 2 stores since Nov 6.
Owners of the CNS line describe quiet, even convection heat and a clean, low-profile wall look. Complaints center on slow warm-up and the limited output of the 1000 W model.
CNS is a modern surface-mounted convection heater with a sleek European slimline design. It works for stand-alone installation or as an effective, efficient replacement for traditional baseboard heaters, using significantly less room. CNS heaters use natural convection for draft-free operation. Cool room air flows in the bottom of the unit, is warmed by the heating element and rises silently out the top to heat the room. A frost protection setting will maintain an appropriately-sized room above freezing. With its built-in thermostat, a single CNS is perfect as a stand-alone heating system in bathrooms or small rooms. Multiple CNS units can be placed strategically in larger spaces and their temperature settings adjusted individually for maximum comfort control. CNS heaters range in size from 1000-Watt to 3000-Watt in both 120-Volt and 240-Volt/208-Volt models.
