About Us

Dawson Mechanical Contracting, LLC has been in the plumbing, heating and air conditioning services field for over 20 years. Under the leadership of Dave Weinfeldt, Dawson Mechanical keeps pace with ever changing building and installation codes, techniques and advances in plumbing, heating and air conditioning technology.  

Dave Weinfeldt, owner of Dawson Mechanical Contracting, is an instructor for plumbing contractor continuing education programs under the NEW JERSEY STATE LEAGUE OF MASTER PLUMBERS, INC. Dave is a frequent contributor and reviewer of pending NJ State legislation being drafted to protect the health, safety and welfare of the people living and working in the state of New Jersey.


  • BPI Building Performance Institute Inc., Heating & A/C Certified Envelope Analyst
  • Gastite CSST Certified
  • Registered Home Improvement Contractor 13VH00035000
  • New Jersey Division of Fire Safety Fire Official
  • OSHA (Occupational Safety and Health Administration) Certified
  • AC & R Safety Coalition Certified *R-410A, R-22 EPA Certified Refrigerant

*(R-410A also known as AZ-20, Suva 410A and Puron)