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

Power Input

Natural Gas: 28,000 - 117,000 Btu
LP Gas: 28,000 - 117,000 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: .80  LP: .84

Thermal Efficiency

NG: 80%  LP: 83%

Dimensions

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

Weight

44 lbs.

Modulating Gas Valve

Yes

Ignition

Hydro-generated (no electricity)

Optional Accessories

Power vent for horizontal venting (AQ1)
   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 None
Vent Size 5" (double wall type B)
Vent Termination

Vertical

 

tech_specs_125bpv.gif
Power Vent Option
Power vent option illustrating the side wall vent option that allows horizontal venting and elimination of the chimney (Part #AQ1).

tech_specs_125bnat.gif

tech_specs_125bcloset.gif
Closet installation of 125HX with proper venting shown.
   
125HX Tech Support
AquaStar 125HX
 

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

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