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Bosch Aquastar 2400ES Tankless Water Heater Techs & Specs
Please Note: Bosch no longer includes a vertical drain pipe or condensation
drain tube kit with this unit. You must check the manual to see if these parts are necessary for your
installation, in many cases, they will be. These items can be purchased at
Zvent Z Flex 3-Inch Sealed Stainless Vent Pipe.
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Bosch AquaStar 2400ES - Applications and Sizing
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BTU Input
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NG: 19,900 to 175,000
LP: 19,900 to 175,000
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Energy Factor
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.82
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Thermal Efficiency
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82%
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Ignition
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Electronic (120V plugs in)
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Minimum Flow Rate to Activate
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0.65 GPM
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Flow Rates (gpm)
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6.4 @ 45°F rise
5.3 @ 55°F rise
4.6 @ 65°F rise
3.8 @ 77°F rise
3.2 @ 90°F rise
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Weight
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67 lbs.
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Dimensions
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30 1/2" H by 17.875" W by 11 1/4" D
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Modulating Gas Valve
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Yes
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Optional Accessories
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Outdoor Kit (AQOK)
Remote Thermostat (TSTAT2)
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Life Expectancy
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20+ years
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Model AquaStar Bosch 2400ES - Installation Specifications
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Voltage
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120 VAC
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Exhaust Vent Size
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3-inch Stainless Steel
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Combustion Air Pipe Size
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3-inch PVC / Alum. / Galv.
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Vent Termination
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Horizontal or Vertical
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Min / Max Vent Lengths
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Minimum length: 3 feet
Maximum length: 26 ft. (8m) with one 90 degree elbow.
Less 2.5 ft. for each additional 90 degree elbow (1.25 ft for each 45 degree elbow)
Max 3 90 degree elbows.
May require an Condensate Drain - see Install Manual
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Gas Connection
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3/4 inch Male NPT
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Water Connections
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3/4 inch Male NPT
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Natural Gas Pressure
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Min: 4" WC
Max: 14" WC
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Propane (LP) Gas Pressure
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Min: 9" WC
Max: 14" WC
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Water Pressure
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Min: 30 PSI
Max: 150 PSI
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Model AquaStar Bosch 2500ES - High Altitude Operation
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Propane or Natural Gas
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Altitude 0 - 2,000 ft
(0-610 m)
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No modification
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Altitude 2,000 ft - 4,500 ft
(610m-1,372m)
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CO2 adjustment with flue gas analyzer required
see manual for instructions
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Altitude above 4,500 ft
(1,372m)
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Not approved
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For operation at elevations above 2,000 ft (610 m) the equipment
ratings shall be reduced at the rate of 4% for each 1000 feet (305m)
above sea level.
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