Kozy Heat Osseo Linear

It's meant as supplemental heat for one room, and Kozy Heat's figure is up to about 500 sq ft. The brochure rates both the standard and Slim versions at 5,000 BTU from a two-stage heater with a blower, and the Slim's manual lists the stages as 750 watts on low and 1,500 watts on high. The manual is clear that it isn't intended to be a primary heat source.

Either works on both versions: The brochure lists them as plug-in or hardwired at 120 volts. The Slim's manual rates it at 1,500 watts, ships it with a three-prong cord, and calls for a dedicated 15-amp (or larger) breaker with nothing else plugged into that circuit. Plug it straight into a wall outlet—never an extension cord or power strip—or have a qualified electrician remove the cord and wire it to the house circuit.

Yes. The heater button has an off setting (H0) that shuts off the heater and blower while the flame display keeps running. You can pick from three flame colors (orange, blue, or both), adjust brightness, and set the flame speed to one of three levels. The ember bed has eleven colors plus an auto-cycle mode, with four brightness levels and a pulsing setting.

Depth is the big one: The standard Osseo 45 needs a framed opening 48-3/4 inches wide, 23 inches tall, and 12 inches deep, while the Slim's framing depth is just 5-7/8 inches. The standard model's viewing area is 16-3/8 by 45 inches, and the Slim's is 16-1/4 by 45-1/8 inches. For a Slim going into a 2x4 wall, the manual calls for the OSO45-TAK trim accessory kit. The Slim also skips the large crystals that come with the standard model.

It depends on the version. For the standard Osseo 45, the brochure puts a 2-inch mantel 2-7/8 inches above the top of the viewing opening and the ceiling 7-7/8 inches above it. For the Slim, the manual measures from the top of the appliance front: A 2-inch mantel starts 3-1/2 inches up, deeper mantels gain 2 inches of depth for every inch they rise, and the ceiling must be at least 7-7/8 inches above. Either way, keep curtains, furniture, and bedding at least 36 inches from the front.

The Slim can do either. It sets flush in a framed opening with the included nailing flanges, so facing material up to 5/8 inch thick runs to the trim around the glass, or it hangs on the wall from the bracket that ships fixed to its back, ideally screwed into studs and lifted by two people. For the 12-inch-deep standard Osseo 45, the brochure gives only framed-opening dimensions (48-3/4 by 23 by 12 inches), so check its own manual before planning a wall hang.

No. It runs entirely on 120-volt household power, and neither the manual nor the brochure lists a battery backup, so the flame effect, ember bed, and heater all go off in an outage. The coin battery (CR2025) only powers the remote.

Clear acrylic crystals and river rock come with it, and the standard model also gets large crystals. Optional media includes driftwood, traditional logs, lava rock, and a slim log set. The brochure lists an overlay front as included, with a black four-piece rectangle surround as an add-on, and the order form also offers a 3/4-inch finish trim kit.

The Slim's manual says it meets HUD construction and safety standards for manufactured homes when it's installed according to its instructions. It's an indoor appliance only: The manual says not to use it outdoors and to pick a spot that isn't prone to moisture, and the warranty excludes damage from use on porches, in laundry rooms, or in other damp places. Plan on yearly cleaning of the vents and glass, since there are no user-serviceable parts inside.