Pennsylvania to Maryland: master HVAC technician license reciprocity

How local licensing works. With no state HVAC board, each Pennsylvania city that licenses the trade does so under its own ordinance. The credential that travels best between them is the ICC National Standard Master Mechanical examination, which Pittsburgh and Reading both use and which Reading's reciprocity practice implicitly relies on.

Philadelphia. No HVAC or mechanical trade license. Mechanical permits must be performed by a business holding the general Contractor License: $126 a year (including a $20 application fee), general liability of $500,000 per occurrence, $300,000 auto liability, workers' compensation, a Commercial Activity License and tax ID, tax compliance, and an OSHA 30 course for supervisors; there is no exam or experience requirement and no out-of-state provision. Ductwork on the job must be done by licensed sheet metal technicians or apprentices employed by the contractor. Businesses working only on existing one- or two-family homes may register as home improvement contractors instead.

Pittsburgh. The Department of Permits, Licenses and Inspections issues the Mechanical/HVAC Trade License to individuals ('Trade Licenses are issued to individuals, not to companies'), required to install, erect, enlarge, repair, alter, remove, convert or replace any mechanical system in the city (Pittsburgh Code 741). New applicants provide proof of passing the City-proctored Master Mechanical exam or an ICC Standard Master Mechanical exam for any code year, and a resume or employer statement showing four or more years of practical experience (notarized statement if self-employed). PLI's rules state that 'equivalent certification testing programs from states other than Pennsylvania shall be accepted as proof of compliance of the testing requirements upon review and determination of equivalence by the License Officer'. The 2025 fee is $120 (initial and renewal); licenses expire 365 days after issue and renewal requires eight hours of continuing education in the prior twelve months. Insurance ($1,000,000 per occurrence / $2,000,000 aggregate general liability plus workers' compensation) is not needed at application but must be on file before any permit is issued. Applications go through OneStopPGH.

Reading. The Master Mechanical Heating Contractor license ($90 a year) requires a valid mechanical journeyman license, at least two years employed as a mechanical journeyman by a registered mechanical contractor, and a passing ICC F29-N Master Mechanical exam (or its successor). A reciprocal master license ($190, including a one-time reciprocation fee and the annual fee) may be issued to the holder of an equivalent license from a first-, second- or third-class U.S. city issued by an equivalent board of examiners with standards equal to Reading's; the applicant attaches the other jurisdiction's current requirements. As of 7/7/2023 Reading lists reciprocity with Harrisburg, Philadelphia, Scranton, Lancaster and Pittsburgh and with 'most, if not all, surrounding states with a state license'.

Erie. Master licenses are required for Mechanical and HVAC Installers, with a separate Refrigeration license, and 'Only Master License holders are able to obtain a permit'; applications are reviewed by the Trades Licensing Board, which also handles temporary licenses. The ordinance defines the Master Mechanical Contractor as one who contracts to install, erect, alter, extend, maintain or repair heating and ventilation, air-conditioning and refrigeration systems, process piping and sheet metal work. Reading treats Scranton as a reciprocal city.

Altoona. HVAC contractors need a city business license, and for commercial work a City of Altoona Contractor's License with liability and workers' compensation insurance; residential work requires only the state Home Improvement Contractor registration.

Allentown and Harrisburg. Neither publishes an HVAC or mechanical license (Allentown licenses electricians, plumbers and sheet metal workers; Harrisburg licenses electricians, plumbers and low-voltage installers).

Out-of-state holders. Pittsburgh's acceptance of any ICC master mechanical exam (and, on review, equivalent out-of-state exams) and Reading's reciprocal license are the only published accommodations; neither waives the experience documentation or local fees. Everywhere else the out-of-state license is irrelevant and the contractor obtains the local business-level license.