Pipe insulation plays a crucial role in maintaining the energy efficiency of an HVAC system. By reducing heat loss or gain, pipe insulation helps to minimize energy waste and optimize system performance. In fact, according to the U.S. Department of Energy, properly insulating pipes can save up to 10% of the energy used by an HVAC system. By selecting the right pipe insulation material and ensuring proper installation, engineers can maximize the energy efficiency of their HVAC systems.