Tankless Water Heater Vent Clearances

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.

Tankless water heater vent clearances.

This configuration allows tankless units to fit in smaller spaces. Direct vent units pull in air from outside the home or building and have two vents one for intake and one for exhaust. While electricity water and gas supplies are connected the rinnai water. Non condensing tankless water heaters typically transfer to the water only about 80 percent of the heat they generate.

Vent terminals must be a minimum of 5 5 inches 14 cm and a maximum. Tankless water heater vent clearances. With a condensing tankless water heater you don t need metal venting. Tankless water heaters are vented in two ways.

Condensation tankless water heaters minimize the value of the installation. This appliance is direct vent where air is brought in from the outside and combustion gases are exhausted to the outside. If the unit is vented to the outside then it needs 12 inches of clearance from a door or window. Tankless water heaters blow exhaust from the heater horizontally with the use of fans thereby permitting vents to end on a different position of your house.

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. The rinnai water heater is one of the most advanced water heaters available. A tankless water heater requires a 4 foot clearance from the side or below a door or window that opens unless the unit is directly vented to the outside. Tankless water heater venting style permits for multiple emission choices.

Direct vent and power vent. The remaining heat creates a hot exhaust gas that requires metal venting typically stainless steel or thick aluminum. If the window does not open the tankless water heater clearance from a window requires a 12 inch setback. The vent terminal for direct vent and outdoor tankless water heaters.

See corresponding letter reference in. The water heater or boiler units must be vented in accordance with the venting of equipment section of the latest edition of the ansi z223 1 nfpa 54 natural fuel gas code in the. Improper venting of the water heater or boiler units can result in excessive levels of carbon monoxide which can lead to severe personal injury or death.