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4.2.1. Bosch AquaStar Gas-Fired Tankless Water Heaters

Bosch AquaStar Tankless Water Heaters are designed for installation as ’Central’ hot water systems, but are compact enough to be wall mounted close to the point of use in many applications. Bosch Aquastar models are gas-fired tankless water heaters requiring adequate ventilation (both indoor and outdoor models are available). For non-ventilated applications, consider a Bosch PowerStar electric tankless water heater.

There are several Bosch AquaStar models available, and all provide essentially unlimited volumes of hot water. They are classified by their hot water delivery flow rates:

Small Applications Heater (2.6 gpm at 45F rise):

  • Bosch AquaStar 1000P Tankless Water Heater - is a gas-fired ’central’ tankless water heater specifically designed for smaller applications in cottages, cabins etc.

1 Shower Equivalent Heaters (4.3 gpm at 45F rise):

  • Bosch AquaStar 1600P Tankless Water Heater - is our most popular compact gas-fired tankless water heater designed to supply endless hot water and big energy savings.
  • Bosch AquaStar 1600H Tankless Water Heater - incorporates a revolutionary hydro-generated ignition system, that does not require a standing pilot, electricity, or a battery.
  • Bosch AquaStar 1600PS Tankless Water Heater - is specifically designed to backup preheated water (ex. from solar, woodstove...)
  • Bosch AquaStar 125FX / 125BO Tankless Water Heaters - are sized for most homes and small businesses (125FX Power Vented Model, 125BO Outdoor Model)

2 Shower Equivalent Heaters (6.4gpm at 45F rise):

  • Bosch AquaStar 2400E / 2400EO Tankless Water Heaters - our most popular High Volume gas-fired tankless heaters (2400E Indoor Model, 2400EO Outdoor Model)
  • Bosch AquaStar 250SX / 250SXO Tankless Water Heater gas-fired tankless heaters feature compact size / sealed combustion for installation in small spaces (250SX Indoor, 250SXO Outdoor)

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