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  • Northern Bay Environmental Systems, Inc.
    Northern Bay Environmental Systems, Inc.
    410-768-8910
    7505 D Connelley Dr., BWI Commerce Park, 21076  Hanover

    Northern Bay Environmental Systems, Inc. has been in the mechanical contracting business for over a quarter of a century.  Incorporated in Maryland in April 1980 as an commercial HVAC and refrigeration installation and service contractor.  Over the past twenty-five years the company has grown at a …

  • Signature Home Services, Inc.
    Signature Home Services, Inc.
    (410) 540-9940
    6418 Anderson Ave, 21076  Hanover

    Signature Home Services, Inc. is a full service heating and air conditioning company. We are fully licensed and insured. Our company is backed by nearly 20 years of HVAC experience. Located in Howard County, we service the central Maryland region and we strive to meet our customers' needs.