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Bosch Therm 520 PN NG Indoor Natural Gas Tankless Water Heater

Water Heater Description

Bosch Therm 520 PN NG Indoor Natural Gas Tankless Water Heater

The Bosch Therm 520 PN NG is the perfect tankless solution for smaller families and households that only use no more than two hot water applications at a time.

  • 78%+ thermal efficiency
  • 5.3 gallons per minute capacity at 35F degree rise
  • Vents with galvanized B vent, natural draft

This Bosch Therm 520 PN NG model offer Piezo push-button ignition and utilizes a modulating gas valve to ensure a constant temperature at varying flow rates. Minimum activation flow rate of 0.5 gallons per minute. Endless hot water for up to 2 applications at a time. Features 78%+ thermal efficiency. Utlizes natural gas as a fuel.

Manufacturer SKU: Bosch Therm 520 PN LP

Manufacturer PDF: Bosch_Therm_Compact_Tankless_Water_Heaters_Sell_Sheet.pdf

Water Heater Warranty

Waterheaters.com will honor all warranties in accordance with manufacturer policies and procedures. Manufacturer warranty issues should be addresses directly with the manufacturer.

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

Water Heater Specifications




Natural Gas


Tankless (whole house)

Ignition Type

Piezo Electric

Energy Star



Why Choose Us

Local Service on Long Island, NY for both Residential & Commercial water heaters.

For every water heater installed, Waterheaters.com donates 100 meals to children through Island Harvest.

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