High Efficiency Furnace Exhaust Distance To A Door Or Window

Less than 1 foot 300 mm above grade level.

High efficiency furnace exhaust distance to a door or window.

There are several other important aspects of high efficiency furnace venting. Forbidden locations for gas heater direct vent terminations the exhaust vent terminal shall not be located. The bottom of the vent terminal shall be located at least 12 inches above grade. Typically for gas furnaces there must be a minimum of 24 front accessibility to the furnace and any access door or panel must have enough clearance space to permit removal of the largest component in the equipment.

Within 3 feet 900 mm horizontally of the vertical centerline above the gas service regulator vent outlet to a maximum vertical distance of 15 feet 4 5 m. 6 the distance from the bottom of an exhaust outlet to finished ground level or to any nearer and lower permanent horizontal surface shall be not less than 100 mm. The pvc pipes are used for air intake exhaust gas and to remove the corrosive condensation resulting from the combustion process. A conventional furnace vents these combustion gases through a vertical exhaust system that is attached to the furnace.

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. The vent terminal shall be at least 12 inches below 12 inches horizontally from or 12 inches above any door window or gravity air inlet into a building.