Therm 330 PN

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The tankless solution for smaller residential applications


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 PNSpecifications
Condensing/Non-Condensing Non-Condensing
Application Residential
Max Input (BTU) 74,900
Min Input (BTU) 23,906
Capacity at 35°F Rise (gpm) 3.3
Capacity at 55°F Rise (gpm) 2.1
Intelligent Cascading No
Min Flow Rate 0.5 gpm
Temp Range (°F) High - Low
Temp Stability (°F) n/a
Default Temp (°F) n/a
Energy Factor .68
Thermal Efficiency 77%
Installation Options Indoor
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
Condensing Heat Exchanger n/a
Venting Options Galvanized B-Vent
Vent Maximun Run n/a
Energy Star Rated No


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