125FX Technical Support
Online Technical Support from Bosch Water Heaters
 
   
   Specifications

Power Input

Natural Gas: 28,000 - 130,000 Btu
LP Gas: 28,000 - 125,000 Btu

Minimum Flow to Activate

0.5 gallons per minute (gpm)

Flow Rates

50°F rise @ 3.6 gpm
55°F rise @ 3.3 gpm
65°F rise @ 2.8 gpm
75°F rise @ 2.4 gpm
90°F rise @ 2.0 gpm

Energy Factor

NG: .78  LP: .81

Thermal Efficiency

NG: 80%  LP: 82%

Dimensions

Height: 29.75"
Width: 18.25"
Depth: 8.75"

Weight

52 lbs.

Modulating Gas Valve

Yes

Ignition

Electronic (120V plug included)

Required Accessories

Vent Terminator (FXHOOD)
   Installation Specifications

Gas Connections ½" Male NPT
Water Connections ½" Male NPT
Natural Gas Pressure Minimum: 7" WC
Maximum: 14" WC
LP Gas Pressure Minimum: 11" WC
Maximum: 14"
Water Pressure Minimum: 18 PSI
Maximum: 150 PSI
Electrical Supply 120 volts/1.2 amps (plug in)
Vent Size 4" (single-wall stainless or galvanized)
Vent Termination

Horizontal w/FXHOOD*

 

 

 

 

 

 

 

 

 

 

*FXHOOD required with AquaStar 125FX

tech_specs_125fx.gif

The Horizontal Vent Terminator – FXHOOD is design approved for the 125FX and has a built-in back draft flapper to prevent negative air from freezing the unit.
   
125FX Tech Support
aquastar 125fx
 

Note: Specifications and product information subject to change without notice.

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