Bosch Combi Boiler – 134,400 BTU – Greenstar ZWB42-3

Bosch ZWB42-3 is a high-efficiency regular boiler built to meet the heating demands of large homes and multi-zone systems. Designed for consistent performance, it delivers dependable heating while minimizing energy use throughout the year.

Rated at 140,000 BTU heating capacity, this natural gas boiler is well-suited for properties with higher heating requirements. Its condensing design and modulating burner automatically adjust output to match demand, improving heat efficiency and helping lower fuel costs without sacrificing comfort.

When properly installed and maintained, the unit typically operates for 12-15 years. Regular servicing, including cleaning and descaling, helps preserve performance and extend system life. The boiler includes a 5-year parts warranty and a lifetime heat exchanger warranty. Purchases through HVAC Fixed also come with a complimentary 1-year labor warranty, flexible financing options up to 20 years, and the option to add extended labor coverage for added security.

With an impressive 95% AFUE rating, the ZWB42-3 maximizes usable heat by capturing energy from exhaust gases that would normally be lost. This advanced efficiency not only reduces utility bills but also supports environmentally responsible home heating.

Related Documents

• Bosch Greenstar Brochure
• greenstar_warranty