Buildings are cooled using different types of HVAC systems and equipment, from ceiling fans to district chilled water (CHW) plants. Here's a list we've compiled of many of the HVAC acronyms and HVAC. Pipework · HVAC · Chilled Water Pipework (CHW) · Condenser Water Pipework ( CCW) · Refrigeration · Variable Refrigerant Volume (VRV). Knowing the acronyms and abbreviations for HVAC terms can help you when. Chilled Water Schematics - How to read hvac engineering drawing diagram.