Bosch Aquastar 125BS/1600PS Heat Exchanger

The Bosch Aquastar 125BS Solar Heat Exchanger Part number 8705406189 is the replacement heat exchanger for the Bosch Aquastar 125BS tankless water heater. It is also the replacement heat exchanger for the Bosch Aquastar 1600PS tankless water heater.

The Bosch Aquastar 125BS/1600PS Heat Exchanger will NOT work for the Bosch Aquastar 125 series, 425PN, 425HN and 425HNO tankless water heaters. Please click the link for a Bosch Aquastar 125 series heat exchanger part number 8705406380.

Bosch AquaStar 1600PS Solar Pre-heat Tankless Water Heater

The Bosch 1600PS Solar Tankless Water Heater is designed to take preheated water from a solar or wood heated system. It is the only Bosch AquaStar Tankless Water Heater that can take preheated water as input!

The "P" in the product name indicates that the Bosch 1600PS has a pilot light for its ignition system. The "S" stands for solar.

The Bosch 1600PS has the same specifications as the Bosch 1600P, except for the fact that it can take preheated solar water.

One common question is whether the Bosch 1600PS tankless water heater can be used WITHOUT preheated solar water. The answer is Yes! So, if you do not currently have a solar system in place but are planning to get one, you can definately install the Bosch 1600PS now in advance of your solar system purchase.

Just like the Bosch 1600P, the 1600PS provides 4.3GPM at a 45 degree F temperature rise and has a low minimum activation rate of just 0.5GPM. Both heaters take a BTU input from 23,400 - 117,000 BTU input. Also, both the 1600PS and the 1600P take 5" double-wall, Type B galvanized venting.

Steve