The Bosch CL042‑1VTC‑LLT‑PUA is a high‑performance 3.5‑ton vertical water‑source heat pump from Bosch’s CL Series, designed for residential and light commercial applications. With a left‑return side airflow arrangement and using R‑454B A2L refrigerant, this unit delivers superior energy efficiency while meeting current global warming regulations
Equipped with a scroll compressor, copper coils, and optional ECM constant‑torque or constant‑airflow blower motors, the CL Series ensures quiet, cost‑effective operation. Service‑friendly features include a swinging electrical box and slide‑out blower. Compact yet robust, this heat pump easily integrates into replacements or new builds while offering water coil freeze protection and minimal environmental impact



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