Gas Tankless Water Heaters

Therm 520 HN

^{Energy Efficient}

Patented Hydro-power ignition saves electricity and gas
Therm 520 HN

Product Overview

The Therm 520 HN incorporates an evolutionary hydro-power ignition system which allows this tankless water heater to work without a standing pilot, grid connection or battery! A small turbine inside the water heater uses the energy from the flowing water to ignite the burner. The modulating
gas valve then maintains a constant temperature at varying flow rates. This innovative technology, patented by Bosch, makes this an ideal product for installations without access to electricity or regions prone to inclement weather and power outages.

Features & Benefits

Patented Hydro-power ignition requires no electricity
80% thermal efficiency
117,000 BTU maximum input
5.3 gallons per minute capacity at 35F degree rise
Endless hot water for up to 2 applications at a time
Minimum activation flow rate of 0.6 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
Available in NG and LP models

Warranty

15 year limited warranty on heat exchanger

2 year warranty on all other parts

Bosch Warranty Details

Product Warranty

Therm 520 HN	Specifications
Condensing/Non-Condensing	Non-Condensing
Application	Residential
Max Input (BTU)	117,000
Min Input (BTU)	30,735
Capacity at 35°F Rise (gpm)	5.2
Capacity at 55°F Rise (gpm)	3.4
Intelligent Cascading	No
Min Flow Rate	0.6 gpm
Temp Range (°F)	n/a
Temp Stability (°F)	n/a
Default Temp (°F)	n/a
Energy Factor	0.78
Thermal Efficiency	80%
Installation Options	Indoor
Dimensions (w x h x d)	18½" x 36¾" x 10½"
Weight (lbs.)	35
Inlet Connection	½" NPT
Outlet Connection	½" NPT
Gas Connection	¾" NPT
Max Water Pressure	150 psi
Min Water Pressure	30 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