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Bosch Aquastar 2400ES Tankless Water Heater Venting Options

Important Bosch 2400ES Venting Information

NOTE: The Bosch Aquastar 2400ES exhaust must be vented to the outside with a sealed 3" stainless steel vent pipe (AL29-4C). The appliance's flue gases are under positive pressure and must travel through a stainless steel 3" pipe that is sealed gas tight. Stainless steel vent pipe is equipped with sealing gaskets for ease of installation, proper safety and durability. The heater shall not be vented in combination with any other appliance and the appliance must only be vented with a dedicated sealed vent system.

COMBUSTION AIR
Because the Bosch AquaStar 2400ES has direct vent room-sealed combustion, it can obtain make-up (combustion) air from inside the home (ambient air) or from outside the home. It is recommended to pipe the combustion air from outside the home as this is generally cleaner air, allowing for less maintenance on the water heater and a longer life expectancy of the unit.


Horizontal Vent Termination
Horizontal Vent Termination for the 2400ES
Vertical Vent Termination Vertical Vent Termination for the 2400ES
If you will be terminating the vent pipe from the Bosch AquaStar Model 2400ES horizontally out a sidewall, the AQ3ES Vent Kit is required.
Please Note: See our full line of 3-inch Stainless Steel Venting Components.
If you will be terminating the vent pipe from the Bosch AquaStar Model 2400ES vertically up a chimney, the AQ3ES Vent Kit is not required.
Please Note: See our full line of 3-inch Stainless Steel Venting Components.
Exhaust Venting example for a Bosch 2400E Tankless Water Heater

Intake Air Venting example for a Bosch 2400E Tankless Water Heater
Bosch AquaStar 2400ES Water Heater Manual

AQ3ES Venting Manual

Condensation & Rain Prevention Requirements


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