Kozy Heat SP34

The SP34 is rated to heat about 500–1,050 sq ft, a good size for a bedroom, a den, or a small family room. It burns up to 20,500 BTU/h on natural gas or propane and turns down to 14,000 BTU/h on natural gas and 15,000 BTU/h on propane. Kozy Heat lists its EnerGuide (P.4) efficiency at 74.57% on natural gas and 74.36% on propane, and the manual approves it for bedroom installs.

Beyond the vent pipe and gas line, nothing else is required: The six-piece log set and the standard safety screen come with it, and the screen ships preinstalled. Everything else is optional—a prairie or arched prairie overlay that clips over the screen, black glass firebox panels, and an exterior finish trim kit that hides the edge of facing material that butts up to the unit. The upper hood and the provided vent heat shield both have to be installed.

That depends on which version you order. The electronic-ignition SP34-L comes with a Proflame 2 remote that works as a thermostat and adjusts six flame levels and six fan speeds, and its fan kit is standard. The standing-pilot SP34-MV runs from an on/off rocker switch and a HI/LO knob on the gas valve, and its 75 CFM fan, remotes, wall switches, and thermostats are all optional add-ons.

Yes, both versions can run without household power, but the fan stops either way. The millivolt SP34-MV needs no 120-volt supply at all; only the optional fan plugs in. The SP34-L normally runs on 120 volts, and with four AA batteries in its backup pack the burner and flame-height adjustment keep working during an outage while the fan and accent light don't.

The SP34 is a direct-vent fireplace that uses 4″ x 6-5/8″ co-axial pipe, terminated either through the roof or through a wall. A vertical run can be 3 to 50 feet. Straight off the top with no rise, the horizontal run can reach 48″; with a 25-foot rise it can reach 25 feet, for 50 feet of total vent and no more than five 90° elbows. Kozy Heat's #700-2 flexible kit is also approved for horizontal terminations.

Yes, with an approved conversion kit. It can run a 4″ aluminum flex liner up an existing Class A metal or masonry chimney with at least a 7″ inside diameter, or use a co-axial to co-linear adapter with 3″ x 3″ flex pipe, and either liner must be 10 to 50 feet long. Have the chimney inspected first, and it can't share a flue with a wood-burning appliance.

Yes, but it's built for natural gas at the factory, so propane takes a certified conversion kit: LCK-SP34L-S30 for the electronic-ignition SP34-L or OCK-S55A for the standing-pilot SP34-MV. The SP34-L also needs the propane valve stepper motor (700-503-1), which is sold separately. On propane it keeps the same 20,500 BTU/h maximum input, with a 15,000 BTU/h minimum.

Yes, where local codes allow it. The manual approves it for an aftermarket, permanently located manufactured home (an approval it marks as USA only) or mobile home. It has to sit on a level surface, directly on wood or a noncombustible surface; on carpet, tile, or vinyl it needs a metal or wood panel under its full width and depth.

The enclosure needs to be at least 42″ tall, 34-1/2″ wide, and 14″ deep, with 0″ clearance at the standoffs, 1/4″ at the corners, 36″ in front, and 4-1/2″ to a side wall. A combustible 3/4″ trim can start 33-1/2″ above the enclosure floor and a 6″ mantel at 37″, adding 1″ of depth for each extra 1″ of height. The manual gives no TV clearance; it recommends a mantel to deflect heat and leaves TV placement to the homeowner. No hearth or floor protection is required in front.