PRODUCTS WE CARRY



Bosch Non-Condensing Therm 520 and 330 Series

The Bosch Therm 520 and 330 Series hot water heaters are perfect for family households. No electricity is required for ignition, ensuring proper starting in any condition. While providing endless hot water, it saves money because it only heats water when you need hot water. Efficient and cost-effective these units are an excellent choice for the smaller household!

  • 78%+ thermal efficiency
  • Endless hot water
  • Minimum activation flow rate of 0.5 gallons per minute
  • High to low temperature control
  • Available in NG and LP models
  • Vents with galvanized B vent – natural draft
  • Built for durability and serviceability with 15-year warranty and 20+ year life expectancy
  • Ignition Requires No Electricity
MODELConfigurationMax
MBtuH
Min
MBtuH
Flow Rate
GPM
UEFTemp.
Range
Dimensions
HxWxD
Weight
Lbs.
GAS CONNECTION
520HN 117.0 0.0 5.30 80.00 18½" x 36¾" x 10½" 35 ¾"
520 PN 117.0 0.0 5.30 78.00 18½" x 36¾" x 10½" 35 ¾"
330 PN 75.0 0.0 3.30 78.00 12 ¼" x 22 7/8" x 8¾" 26 ¾"

Warranty Information

  • Heat Exchanger for 180 months -
  • All Parts for 24 months -

Available Documents

Totally Tanklessstarstarstarstarhalf star4.9 / 5

5 stars
55
4 stars
3
3 stars
0
2 stars
0
1 stars
0

59 Total Reviews Totally Tankless



An efficient & reliable comfort system begins with a good plan.