HVAC Code Practice Test Practice Exam 2026 - Free HVAC Code Practice Questions and Study Guide

Before any portion of a mechanical system that requires a permit can be concealed, it must be inspected and approved by the authority having jurisdiction. This ensures the installation is reviewed for proper sizing, venting and combustion air requirements, clearances, supports, and overall safety, and that it complies with the mechanical code. Concealing work before this final review would hide potential defects or code violations, making future maintenance or corrections much harder. The requirement isn’t just about testing or about getting approval alone; it’s about both inspection and formal approval before concealment, so the system can be accessed if issues arise and meets all code standards.