Limited state licensing

New Hampshire HVAC Licensing and Local Requirements Guide

Limited state licensing

Check the rules for this work

New Hampshire’s Mechanical Licensing Board rules distinguish fuel-gas licenses from voluntary oil-heating certification. Fuel-gas categories include service, equipment installation, piping, domestic appliance work and hearth installation.

Select the credential for the equipment and work involved. The listed oil-heating certificate is voluntary; it is not a single mandatory license covering every HVAC activity.

Check which state license applies ↗

Official source: gc.nh.gov. Retrieved 2026-09-05.

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We do not store or publish licensee records. Information here may be incomplete or out of date, so always confirm requirements with the licensing authority.

Latest source retrieval: 2026-09-05.