Duct furnaces separate their combustion air form the air in the heated space.
Sealed combustion duct furnace.
Indoor separated combustion duct furnace modine indoor separated combustion duct furnaces are designed and engineered to deliver superior performance in a variety of applications.
Both models offer high effciencies that achieve annual fuel savings of up to 25 over conventional duct furnaces.
The highest efficiency furnaces today combine sealed combustion with a second condensing heat exchanger.
The combustion chamber is the part of the furnace where natural gas is burnt to create the heat that enters into the heat exchanger.
Featuring a single stage two stage or full modulation firing rate this durable 316l stainless steel heat exchanger is available with both natural gas and lp gas flexibility also field.
Also featured is the factory installed power venter and sealed flue collector that controls combustion and excess air during on cycles.
In furnaces that are not sealed combustion units backdrafting of combustion gases can be a big problem.
High efficiency sealed combustion units generally produce an acidic exhaust gas that is not suitable for old unlined chimneys so the exhaust gas should either be vented through a new duct or the chimney should be lined to accommodate the.
The sealed combustion furnace.
The highest performance combustion furnaces are sealed combustion direct vent condensing gas furnaces with an annual fuel utilization efficiency afue exceeding 94.
Modine s gas fired duct furnaces are designed for both indoor and outdoor installations.
Reznor s sc separated combustion gas fired duct furnaces are designed to separate their combustion air from the air in the heated space.
Sterling introduces the nexus unit heater a leading edge condensing heat exchanger delivering up to 97 efficiency.
Finally going with.
Sealed combustion also makes a furnace more energy efficient.
These types of furnaces have a dedicated pipeline that runs directly from an outside vent into a sealed combustion chamber of the furnace and a sealed vent to the outside of the home for venting the toxic fumes from the combustion process.
The combustion chamber loses less heat to the outside making the furnace cost less to run.
For combustion to occur the furnace needs to draw in air to mingle with the gas from the burners.
The separated combustion furnace is designed for use in building areas with negative pressure and or extremely dirty or mildly corrosive atmospheres.
Due to high efficiency furnaces having their own fresh air intake no air is drawn from inside your home.
As we already mentioned this is one of its biggest benefits.
Sales literature technical literature.
Primary applications are for building heating cooling and make up air systems.
