Bosch Singular 4000 Boiler

Bosch Singular 4000 is a compact wall‑mounted combi boiler engineered for residential heating and on‑demand domestic hot water, delivering up to 7.7 gpm and a high turndown ratio (up to 10:1) to match variable loads. With 95% AFUE, an integrated circulator and a sub‑80 lb footprint it simplifies installation in tight mechanical spaces; suitable for supplying 2–3 showers depending on inlet temperature. Standard residential warranty covers a 10‑year heat exchanger, 5‑year parts and 1‑year labor. (bosch-homecomfort.com)