Questions or comments regarding the Board of Heating, Ventilation, Air
Conditioning and Refrigeration Contractors may be directed to hvacr@dllr.state.md.us.
Questions or comments regarding the Division of Occupational and Professional Licensing may be directed to
op@dllr.state.md.us.
Questions or comments regarding the DLLR website may be directed to webmaster@dllr.state.md.us.