AQ3ES Vent Kit Versus AQ3 Vent Kit

The AQ3ES Vent Kit is the current horizontal vent kit sold by Bosch for the Bosch AquaStar 2700ES and Bosch AquaStar 2400ES Tankless Water Heaters. This horizontal vent kit is required for all 2700ES and 2400ES installations that will be vented out the side wall.

The AQ3ES Vent Kit has all of the parts required by the 2700ES and 2400ES warranty for a safe and complete installation assuming that you are mounting your tankless water heater on the same side wall that you are venting out of.

The AQ3ES Vent Kit has a total of 40" of straight vent pipe -- 36" of straight vent pipe are required for installations in freezing areas. If you use less than 36" of straight vent pipe in freezing areas and your heat exchanger freezes and bursts it will not be covered under the Bosch warranty!

Please note that for the intake air on the Bosch 2700ES and Bosch 2400ES heaters you must use 3" rigid vent pipe, such as PVC.

In contrast, the AQ3 Vent Kit was designed for the older Bosch 250SX and Bosch 2400E tankless water heater models. Bosch did NOT require a rigid vent pipe for the intake air on these older models. So, the AQ3 Vent Kit comes with a 10' length of 3" flexible aluminum hose for the intake air. (This flex hose CANNOT be used on the newer Bosch 2700ES/2400ES models.)

Both vent kits come with a 3" x 90 degree elbow, a wall thimble, an exhaust termination box with a bird screen and an intake termination box with a bird screen.

GlobalTowne.com carries both the current AQ3ES Vent Kit and the legacy AQ3 Vent Kit in stock.

Steve