Bosch Tankless Water Heater

Information current as of

Bosch and its Aquastar line are a very popular and well sought after brand of tankless water heaters. Currently Bosch systems are the industry leader due to their high quality and energy saving performance. We have featured a few of the top models here.

The Bosch 2400E replaces the Bosch 250SX. The high performance 2400E sets a standard for tankless water heating by delivering over 5.3 gallons (max 6.35 gpm) of hot water continuously at 87% efficiency — enough to shower with even while filling the tub or washing machine. Yes - you can even run two showers at one time! The Bosch Aquastar 2400E is a sealed combustion tankless water heater which means that you can pull combustion air from outside or inside. Venting either to an outside wall or up through the roof. The 2400E also can pull air from inside if you can not get to outside air. Yes - this is a very flexible tankless water heater.

This model runs around $1000.

Bosch Pro Tankless 425 HN (add pic)

This Bosch unit really gives the impression that water can make fire. The pilot is ignited by a super-concentrated spark generated by a micro-turbine. The micro-turbine is activated by a request for hot water in the house. This energy efficient technology makes the 425 HN the best unit for households looking to maximize energy savings.

• H 29-3/4" x W 18-1/4" x D 8-3/4"
• No Electricity Required
• Pressure relief valve included

This model runs about $780. Click here to buy

Bosch Pro Tankless 635 ES (add pic)

The 635 ES requires no special tools to install or maintain. And its compact size and sealed combustion enables installation in small spaces. A built-in power vent makes both vertical and horizontal venting possible while the electronic ignition maximizes energy efficiency. This unit yields enough power to supply two showers simultaneously and features an adjustable temperature control for improved comfort.

• H 23-1/2" x W 15-3/4" x D 8-1/2"
• Direct Vent Room Sealed Combustion
• Pressure relief valve included

This model costs around $1100. Click here to buy