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About our company

D.J.H. Mechanical Services Inc., family-owned and operated, provides heating, ventilation and air conditioning services to a variety of commercial, industrial and institution clients in the Greater New York Metropolitan Area, New Jersey and Connecticut. The company operates from their own multi-level building that consists of a 3,300 sq.ft. renovated and designed to accommodate a complete work place for our work within the HVAC contracting industry. 

Sylvia Hazlehurst along with her husband, Dennis Hazlehurst, credit the firm's success to its policy of maintaining rigid professional standards and to personal attention given to our clients regarding all facets of each project, from the planning phases to the final after installation inspections. 

D.J.H. Mechanical is a certified minority-owned Sub Chapter S corporation - MWBE Certified.


• Registered Minority and Women Owned Business Enterprise by the New York City Small Business Services Division of Economic and Financial Opportunity 
• Certified Minority Woman-Owned Business Enterprise by the New York State Department of Economic Development, Division of Minority and Women’s Business Development

• Mitsubishi Electric Cooling & Heating Diamond Designer Installer.

• City Multi Service Mitsubishi Electric & Electronics - HVAC Advanced Products Division.

• Carrier Distributor Dealer Service Management

• Weil McLain Ultra Certified Boiler Installer.

HVAC Expertise

• Experts in heating, ventilation, sheet metal and air-conditioning

• Geo-thermal and high efficiency systems

• design, sales, and installation for residential, commercial, industrial and institutional systems

• Westchester County Department of Consumer Protection Home Improvement License
• City of New York Department of Consumer Affairs License

• OSHA refrigerant and safety license


Insurance & Bonding
• As per industry standards, we maintain General Liability, Workers Compensation and Disability, Commercial Automotive Liability and Umbrella Insurance Policies
• Bonding available.

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