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Bosch Aquastar 250SXO Tankless Water Heater Techs & Specs
Fueled by Natural Gas or Propane - Outdoor Installation Only - Electronic Ignition
Bosch AquaStar 250 SXO - Applications and Sizing
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BTU Input
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NG: 35,000 to 175,000
LP: 31,000 to 175,000
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Energy Factor
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.80
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Thermal Efficiency
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87%
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Ignition
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Electronic
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Minimum Flow Rate
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0.8 gpm
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Flow Rates
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6.4 @ 45°F rise
5.2 @ 55°F rise
4.5 @ 65°F rise
3.9 @ 75°F rise
3.2 @ 90°F rise
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Weight
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47 lbs.
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Dimensions
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23 1/2" h by 15 3/4" w by 8 1/2" d
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Modulating Gas Valve
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Yes
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Optional Accessories
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Wireless Remote Control
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Life Expectancy
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20+ years
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Model AquaStar Bosch 250SXO - Installation Specifications
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Electrical Supply
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120 Volts (plugs in)
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Gas Connection
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3/4° Male NPT
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Water Connections
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3/4° Male NPT
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Natural Gas Pressure
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Min: 5" WC
Max: 14" WC
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Propane (LP) Gas Pressure
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Min: 11" 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 250SXO - Required Minimum Clearance
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TOP
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3 feet
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BOTTOM
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1 foot
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FRONT
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4 feet
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BACK
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0
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SIDES
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4 feet
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Model AquaStar Bosch 250SXO - High Altitude Operation
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Propane or Natural Gas
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Altitude 0 - 4,000 ft
(0-1,219 m)
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No modification
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Altitude 4,000 ft - 7,000 ft
(1,219m-2,134m)
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CO2 adjustment with flue gas analyzer required
Contact CEC for instructions
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Altitude above 7,000 ft
(2,134m)
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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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