GREENBUSH, Minn. — Central Boiler has released the Classic Edge 350, 550 and 750, its newest line of hydronic heaters, also known as outdoor wood furnaces. Each of these models meets the new clean burning emission standards.

These three models were added to the list of Central Boiler hydronic heaters that meet the EPA’s New Source Performance Standards which became effective this year. The Classic Edge 750 was the first hydronic heater to receive a letter of certification from the EPA once these standards went in to effect, says the company.

This new patent-pending design delivers better efficiency and more heat output than traditional wood heating.

Urethane insulation, a hallmark of Central Boiler furnaces for over 30 years, is used also on the Classic Edge models. This high efficiency, 100% waterproof and airtight insulation reduces heat loss, allowing the furnace to operate most efficiently.

Preheated air is added around the base of the fire and as the wood begins to gasify, the gases are added to the extremely hot oxygen from the patented Air Charge Tube. Final combustion takes place as these gases move downward to the Reaction Chamber where extremely high temperatures aid in complete combustion. This entire process gives this furnace its high efficiency and extremely low emissions. In addition, the furnace's patent-pending vertical heat exchanger gets the most heat from the wood. It is designed to optimize the transfer of heat from the extremely hot gases to the water, producing exceptionally high thermal efficiency with low emissions per Btu of heat output.

Central Boiler's Classic Edge series works with almost any existing heating system. The heat is controlled by a thermostat for comfortable, even heat and eliminates uneven temperatures experienced from traditional wood heat. This furnace allows people to heat their homes and other buildings economically by utilizing wood rather than costly fuel oil, propane or other fossils fuels. Fluctuating heating costs make the Classic Edge outdoor wood furnaces a great money-saving choice. In addition, it uses a totally renewable resource and removes the dangers from the home associated with indoor heating.