Bosch Tankless Water Heater Reviews: Pros & Cons, And Price

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Last updated: 
January 5, 2022

Why You Should Consider Buying a Bosch Tankless Water Heater

Bosch, a trusted global leader in household appliances, offers a wide range of water heater products, including electric heaters, solar thermal systems, and wall-mounted boilers. Their lineup includes both simple, easy-to-install units and more advanced models that may require professional installation .

What Is A Tankless Water Heater?

Tankless or on-demand water heaters only heat water when a tap is turned on, typically using natural gas or propane instead of electricity. These models are popular for their energy-saving potential, as they do not store and continuously heat water in a tank .

The Top Bosch Tankless Water Heater Reviews

  1. Bosch 330 LP Therm Propane Tankless Water Heater: This propane-powered unit is ideal for areas requiring smaller amounts of hot water. It features a Piezo ignition system, modulating gas valve for consistent temperature, and a maximum input of 75,000 BTU with over 78% thermal efficiency. The galvanized B vent allows for safe outdoor venting of combustion fumes .

  2. Bosch 520 PN Therm Natural Gas Tankless Water Heater: This natural gas-powered model features a Piezo ignition system, modulating gas valve, and provides 5.3 gallons of hot water per minute with a 35°F temperature rise. It has a minimum activation flow rate of 0.5 GPM, 78% thermal efficiency, and a maximum input of 117,000 BTU .

  3. Bosch 940 ES Therm Propane Tankless Water Heater: This high-capacity, non-condensing indoor water heater is suitable for large households. It provides 8.3 gallons of hot water per minute with a 35°F temperature rise, 83% thermal efficiency, and a heating ability of 175,000 BTU per hour. The unit features electronic ignition and a patented burner design .

  4. Bosch Electric Mini-Tank Water Heater: This portable, point-of-use water heater is perfect for RVs, campers, and cabins. It stores four gallons of water and can be installed independently or inline with a larger heater. The unit features a temperature adjustment knob (65-145°F), an advanced thermostat, and a new sensing probe for consistent heating .

Pros and Cons of Tankless Water Heaters


  • Instant hot water access
  • Longer lifespan
  • Lower energy costs
  • Space-saving design
  • Special financing and tax breaks
  • Eliminates standby loss issue
  • Unlimited hot water supply
  • Gas and electric models available
  • Longer warranties
  • Ideal for homes with limited space


  • Potentially inconsistent temperature
  • Higher upfront costs
  • Limited hot water supply
  • May require additional installation equipment
  • Possible need for gas line rerouting
  • Potential for additional maintenance

Despite some drawbacks, tankless water heaters offer numerous benefits, including energy savings and potential tax breaks. It's essential to research customer reviews before making a final decision on which tankless water heater to purchase .


  1. "Bosch Water Heating Solutions." Bosch Thermotechnology,
  2. "Tankless Water Heaters.",
  3. "Bosch Therm 330 PN LP Liquid Propane Whole-House Tankless Water Heater." Amazon,
  4. "Bosch 520 PN LP Therm Propane Tankless Water Heater, Outdoor." Amazon,
  5. "Bosch Therm 940 ES NG High Efficiency Tankless Gas Water Heater." Amazon,
  6. "Bosch Electric Mini-Tank Water Heater Tronic 3000 T 4-Gallon (ES4)." Amazon,
  7. "Tankless Water Heater Buying Guide." Consumer Reports,
  8. "Tankless Water Heaters: Pros and Cons." The Spruce,

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