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Bosch Aquastar 2700ES 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 2700ES - Applications and Sizing
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BTU Input
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NG: 19,000 to 199,000
LP: 19,000 to 199,000
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Energy Factor
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NG: .82
LP: .82
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Thermal Efficiency
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NG: 82%
LP: 82%
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Ignition
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Electronic (120V plugs in)
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Minimum Flow Rate (gpm)
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0.65
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Flow Rates (gpm)
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7.15 @ 45°F rise
5.9 @ 55°F rise
5.0 @ 65°F rise
4.2 @ 77°F rise
3.6 @ 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 7/8" 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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Horizontal Vent Kit AQ3 (Without the Flexible intake Pipe)
Outdoor Kit (AQOK)
Remote Thermostat Control
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Life Expectancy
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20+ years
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Model AquaStar Bosch 2700ES - 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 Sealed Cat III
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Combustion Air Pipe Size
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3-inch PVC Galvanized or another rigid pipe
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Vent Options
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Horizontal or Vertical, Direct Vent Room Sealed Combustion
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Exhaust 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
Please Note: The use of a 90 degree elbow counts as 2 1/2 feet and
a 45 degree elbow counts a 1 1/4 feet toward the minimun vent lenght.
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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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What does Direct Vent or Room sealed mean? The 2700ES can be installed in a small space
with the ability to take in air from the outside via a 3 inch intake vent.
The Bosch AquaStar 2700ES can be vented vertically or horizontally to the
outside. The 2700ES requires a dedicated 3" stainless steel single wall
vent pipe. Other vent types will void the warranty and present a health
hazard. The 2400E also requires an electrical connection for the electronic
ignition.
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Model AquaStar Bosch 2700ES - 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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