High Efficiency Gas Furnace Vent Clearance

Traditional gas fired forced air furnaces produce hot combustion exhaust gasses and therefore need metal vent pipes or chimneys.

High efficiency gas furnace vent clearance. The most efficient furnace units available today are gas condensing models which can achieve efficiency ratings of 90 or above. One of the most important safety features of gas condensing systems is furnace sidewall venting. A conventional natural gas furnace will vent the dangerous combustion gases through a simple vertical exhaust system that is attached to the furnace. National fuel gas code.

American gas association has certified the design of condensing furnaces for a minimum of 0 clearance from combustible materials with a single wall plastic vent pipe. 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. Gas fired high efficiency furnace down flow direct vent sealed combustion thermo pride model cma1 50n cma2 75n installation and service manual 15 cites recounts illustrations clearances from the u s. See direct vents side wall vents for a complete table of recommended clearance distances from a direct vent gas appliance terminal to other building.

Upgrading the heating and cooling system to higher efficiency equipment.