Tankless Water Heater 330 PN

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Tankless Water Heater 330 PN

Tankless Water Heater 330 PN

The Bosch Therm 330 PN model offers Piezo push-button ignition and utilizes a modulating gas valve to ensure a constant temperature at varying flow rates.

Therm 330 PN Specifications:

  • Non-Condensing
  • Residential
  • Max Input (BTU) 75,000
  • Min Input (BTU) 30,735
  • Capacity at 35°F Rise (gpm) 3.3
  • Capacity at 55°F Rise (gpm) 2.1
  • Min Flow Rate 0.5 gpm
  • Thermal Efficiency 78%
  • Dimensions (w x h x d) 12 ¼" x 22 7/8" x 8¾"
  • Weight (lbs.) 26
  • Inlet Connection ½" NPT
  • Outlet Connection ½" NPT
  • Gas Connection ½" NPT
  • Max Water Pressure 150 psi
  • Min Water Pressure 13 psi
  • Min NG Presure 5.7 WC
  • Venting - Galvanized B-Vent

Features & Benefits:

  • Piezo ignition system, requires no electrical connection
  • 78%+ thermal efficiency
  • 75,000 BTU maximum input
  • 3.3 gallons per minute capacity at 35F degree rise
  • Endless hot water for 1 application at a time
  • Minimum activation flow rate of 0.5 gallons per minute
  • High to low temperature control
  • Vents with galvanized B vent – natural draft
  • Built for durability and serviceability with 15-year warranty and 20+ year life expectancy


  • 15 year limited warranty on heat exchanger
  • 2 year warranty on all other parts


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