Brands of Woodburning Inserts

Jotul

• Jotul manufactures three wood inserts. Inserts can heat from 1,300 to 1,800 square feet with a maximum heat output ranging from 40,000 to 65,000 British thermal units (BTUS) per hour. The largest model accepts logs up to 24 inches long and the smallest up to 20 inches. Features include twin blower fans, 6-inch flues, air-washed glass windows and noncatlytic clean burn systems.

Lopi

• Lopi offers seven wood burning inserts. At the high-capacity end, the Freedom Bay model can heat spaces up to 2,250 square feet, produces up to 74,300 BTUs per hour and accepts logs up to 24 inches long. Mid-range options include the Declaration model, which produces up to 73,300 BTUs per hour, enough to heat up to 2,000 square feet. The Answer model holds logs up to 18 inches long, heats up to 1,400 square feet of space and produces up to 66,800 BTUs per hour. Lopi inserts are constructed from steel plate or cast iron and include features such as a five-sided convection chamber system, standard bypass damper and single-control heat output.

Vermont Castings

• Vermont Castings offer three wood burning inserts, the Merrimack, the Montpelier and the WinterWarm. The Merrimack holds up to 22-inch logs, produces up to 31,780 BTUs per hour and heats up to 2,000 square feet. The Montpelier heats up to 1,500 square feet of space with 27,550 BTUs per hour. Though smaller in size, the WinterWarm produces up to 31,000 BTUs per hour. All are manufactured from cast iron and include features such as ceramic glass windows, heat-activated dual fans, thermostatic air control and removable internal baffles for chimney cleaning.

Napleon

• Napoleon's 1101 wood burning insert produces up to 55,000 BTUs per hour, enough to heat more than 1,500 square feet of space. The 1100 accepts logs up to 18 inches long and includes a blower kit. The larger 1402 model can heat more than 2,000 square feet with an output of 70,000 BTUs per hour. Both models include features such as air wash glass windows, noncatalytic design, single-lever burn control and a fully-lined, refractory firebox.

Englander

• Englander manufactures a noncatalytic wood burning insert. The 13-NCI model has a high output of up to 60,000 BTUs per hour, heats up to 1,500 square feet and accepts logs up to 18 inches long. The 13-NCI includes a built-in air wash glass system, a blower kit and a fireplace backplate. The insert can only be installed in masonry fireplaces.