125BS Technical Support
125BS Tech Support
 
   
   Specifications

Power Input

Natural Gas: 28,000 - 117,000 Btu
Liquid Propane: 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

.69

Thermal Efficiency

80%

Dimensions

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

Weight

44lbs.

Modulating Gas Valve

Yes

Ignition

Standing Pilot

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_125bs.gif
The system design demonstrates how to install a Bosch AquaStar as part of a solar-based water heating system. Check your local codes to determine if you need a tempering valve.
   
125BS Tech Support
125BS Tech Support
 

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