High Efficiency Furnace Venting Through Wall

One of the most important safety features of gas condensing systems is furnace sidewall venting.

High efficiency furnace venting through wall. You can capture that heat with a high efficiency condensing furnace. It could either go out the unused walled in chimney that the oil furnace was vented through or they could cut a hole in the concrete block wall and vent it out the side of the house. The most efficient furnace units available today are gas condensing models which can achieve efficiency ratings of 90 or above. That depends on whether you have a standard efficiency or a high efficiency furnace.

Important considerations for contractors and homeowners this guide was developed to provide. After the first stage the hot exhaust gasses are cycled through a second combustion stage resulting in exhaust with very little heat. On the other hand the higher the efficiency of a furnace the lower the flue gas temperature. In comparing the venting of exhaust gases from a high efficiency furnace boiler or water heater with the venting of exhaust gases from a conventional heating system it will be immediately obvious that the high efficiency equipment exhaust is produced at a low enough temperature that it is vented through comparably small diameter plastic piping.

If you decide to install this type of heating system take extra precautions to make sure all ventilation systems are properly placed and working correctly. Two cases which can cause poor venting are the oversizing of the vent or reducing the. A conventional furnace vents these combustion gases through a vertical exhaust system that is attached to the furnace. If your furnace has an afue rating below 90 percent it will most likely have a flue pipe that goes up through your roof.

Higher btuh furnaces produce higher flue gas temperatures. The basement ceiling is about 6 1 2 or 7 feet high. This process creates condensate or moisture from the furnace s heat exchanger. High efficiency condensing furnaces have two stage combustion to extract as much heat energy as possible from burning gas.

A high efficiency furnace uses a different type of venting system because it extracts the heat that remains in those combustion gases before venting the resultant mixture of water and carbon dioxide. However these combustion gases contain residual heat that is lost through the ventilation. Table illustrations of the required space between a direct or side wall vent for a gas fired heating appliance and building windows doors corners gas meter air intakes sidewalks balconies. That s because the combustion byproducts are in a gaseous form so the gases can float up through the flue pipe and out of your roof.

A high efficiency condensing furnace can achieve efficiency ratings of 90 or above. Gas appliance direct vent clearances distances from direct gas vent to building features sidewall vent direct vent direct exhaust systems for gas fired heaters water heaters other appliances. Contractors and homeowners with general information on best practice approaches to installing high efficiency replacement furnaces in existing residential and small commercial. If it went out the chimney it would leave more headroom.