1.2 License Classifications, Scopes & Experience Prerequisites

License Classifications, Scope and Experience Prerequisites

Keep scope and qualification separate. A license describes what work may be performed; § 9A-302 describes the experience and examination needed to qualify. Education or nonstandard work credit is discretionary and is not an automatic substitute for the standard pathway.

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1. Six License Classifications

Title 9A includes six classifications:

Master

A Master license authorizes its holder to provide HVACR services across the statutory scope. The standard Master pathway requires three years of active experience under the direction and control of a Master while working under a journeyman, journeyman restricted, limited, or master restricted license, including at least 1,875 hours in the year before application. The current Board requirements page also instructs an applicant to hold a current journeyman or higher license. The applicant must pass the Master examination.

Master Restricted

A Master Restricted license is a contractor-level credential limited to one of five areas: forced-air heating, hydronic heating, ventilation, air conditioning, or refrigeration. The eligibility pattern is three years of active, relevant experience under an appropriate Master or Master Restricted contractor, including at least 1,875 hours in the prior year, followed by the applicable examination.

The PSI bulletin may group or label examinations differently for testing administration. For example, a combined heating examination can cover forced-air and hydronic heating. That test label does not create a sixth statutory restricted area; the five areas in § 9A-101 control license scope.

Limited

A Limited license is exclusively for maintaining or repairing heating, cooling, refrigeration, ventilation, or hydronic systems. It does not authorize a new installation merely because the proposed equipment replaces an old unit. The standard eligibility rule is at least two years of active experience under a journeyman license and under the direction and control of a Master, Master Restricted, or Limited licensee, including at least 1,000 hours in the year before application, plus the examination.

Journeyman

A Journeyman may provide HVACR services only while under the direction and control of a licensed contractor. The standard pathway requires holding an apprentice license for at least four years and completing at least 6,000 hours of training during that period, followed by the journeyman examination unless a valid apprenticeship-program waiver applies.

Journeyman Restricted

This credential permits work under a licensed contractor in only one of the five restricted areas. The standard pathway requires at least three years as a licensed apprentice and at least 1,875 hours of training during that period in the relevant area, followed by the applicable examination unless a valid waiver applies. The statute does not require 4,500 hours for this classification.

Apprentice

An apprentice license allows the individual to assist while under the direction and control of a licensed contractor and while training to become a journeyman. No trade examination is attached to the apprentice credential. Always use the Board's current application instructions for administrative requirements.

2. Standard Qualification Matrix

The 100-question, four-hour format belongs to the current Master examination. Do not copy that format to every restricted or lower-level test. The current PSI bulletin lists separate question counts and time limits for each examination.

3. Experience Credit Is Case-Specific

Section 9A-302(g) gives the Board three credit mechanisms:

• It may credit up to three years of formal study or professional training that, in the Board's opinion, provides comparable experience.
• It may credit up to six years of otherwise nonconforming work experience when the work is comparable and the failure to meet the ordinary requirements is not the applicant's fault or neglect.
• It shall credit up to three years of qualifying teaching experience as provided by the statute.

These are limits on credit, not a blanket rule that any six years in the trade automatically replaces the licensed progression. An applicant should submit the documentation the Board requests and obtain a Board determination rather than self-declare equivalency.

4. Apprenticeship-Program Examination Waiver

The examination waiver is in § 9A-306(e), not § 9A-302(g). The Board shall issue a journeyman license without examination to an individual who successfully completes an HVACR apprentice program approved by the Maryland Apprenticeship and Training Council. It likewise provides a waiver for a journeyman restricted applicant who completes an approved program in the relevant area. Current Board and PSI instructions direct graduates seeking this route to apply within two years of program completion.

A waiver of the examination does not erase the application, licensing, fee, or scope rules. The license must be issued before independent reliance on the credential.

5. Direction and Control

Direction and control is the legal boundary between a contractor credential and a technician credential. A journeyman or apprentice may have enough technical skill to perform a service call alone, but the licensed contractor remains responsible for assigning work, providing supervision appropriate to the task, and ensuring that the work stays within license scope and code requirements. A journeyman who contracts directly with a homeowner, advertises as the contractor, or lends the credential to an unlicensed business is not converted into a Master by experience.

Example: A Limited contractor may diagnose an existing furnace and replace a failed blower motor. Quoting and installing a complete new furnace is installation rather than exclusive maintenance or repair and exceeds the Limited license definition. Similarly, a Master Restricted licensee endorsed only for ventilation may not accept an air-conditioning installation outside that endorsed scope.