Latest Asked Questions

Bosch AquaStar 1600P is designed to provide one high demand application at a time. The model, in its essence whole house tankless hotwater heater, is a good replacement to house reservoir style water heater. Bosch AquaStar 1600P is designed to replace 125B model. It also features vertical venting through 5" type-b double wall vent. Horizontal venting is possible as well, however it requires the addition of the AQ4. The model has enough capacity to provide a continuous water flow to one major appliance at a time. For small businesses and normal sized homes the model is perfectly enough.
Read on to learn some more Bosch AquaStar (natural gas) 1600P features and specifications:

  • Weight: 33lbs.
  • Dimensions: H: 25 3/4" W: 16 3/4" D: 8 1/2"
  • Power Input : 30,735-117,000 Btu
  • Continuous flow of hot water is up to 4.3 gallons per minute
  • Ignition: Standing Pilot
  • There is no reservoir - no limits to the amount of hot water
  • Utility costs are decreased by up to 50%
  • Occupies little room
  • Can be mounted on the wall
  • Temperature controlling modulating gas valve
  • CSA approved"
  • Pressure relief valve included
  • Flow Rates 90° F rise / 2.1 gpm77° F rise / 2.4 gpm65° F rise / 2.9 gpm55° F rise / 3.4 gpm45° F rise / 4.3 gpm
  • Minimum Flow to Activate (gpm): 0.5 gallons per minute (gpm)
  • Thermal Efficiency : 78%
  • Energy Factor : .69
  • 12-year warranty on heat exchanger. When the heat exchanger is professionally installed the warranty reaches longest span of 15 years.
  • 2 years warranty on parts
  • Comes with power vent for horizontal venting Vertical Vent Kit (H/P VVT)
  • The model is constructed with aluminum and stainless steel
  • All water parts are solid brass or solid copper
  • Heat exchanger is made of solid copper
  • Casing is finished with baked epoxy
  • Burners are made of stainless steel
  • Unit has a safety thermocouple and overheat shutoff protection
  • CSA design certified
  • Compliant with ASHRAE 90.1
  • 82% efficiency rating

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Choose What You Want To Calculate



Water Heater Power
 kW
Water Flow (Per Minute)
 Gallons
See Table "Typical Flow Rates"
Incoming Water Temperature
 °F
Output Water Temperature
 °F

Fixture Type Gallons (Liters) Per Minute
Lavatory
0.5 (1.9)
Bathtub
2-4 (7.6-15.2)
Shower
1.5-3 (5.7-11.4)
Kitchen Sink
1-1.5 (3.8-5.7)
Pantry Sink
1.5-2.5 (5.7-9.5)
Laundry Sink
2.5-3 (9.5-11.4)
Dishwasher
1-3 (3.8-11.4)

Activity Gallons (Liters) Using
Clothes washing
32 (121)
Showering
20 (76)
Bathing
20 (76)
Automatic dishwashing
12 (45)
Preparing food
5 (19)
Hand dishwashing
4 (15)
Source : ACEEE

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