TJ’s considers it of the utmost importance to continually educate ourselves in all facets of our industry.  We are proud of our credentials.

Boiler Installation and Service

Certified Installer and Service Technician for the following:
Laars (including Trianco Heatmaker and Endurance boilers)

Geothermal Heating and Cooling Systems

IGSHPA Certified Designer and Installer
NATE Certified – Ground Source Heat Pump Loop Installer

Oil Burner Installation and Service

Certified Installer and Service Technician for the following residential and commercial oil burners:
Certified Start-Up Contractor for Veissmann commercial boilers (including Weishaupt commercial burners, Riello commercial burners, and Siemens combustion controls)


Certified Veiga Radiant System Designer and Installer
Certified Hydronic Piping Designer
Certified Trade Associate of the Radiant Panel Association

Air Conditioning

MA Master Sheet Metal License
Certified Designer and Installer of Unico high-velocity air conditioning systems
Certified Rheem Dealer
Certified Tappan Dealer


Tekmar Controls Certified
Innovex Controls Certified

Plumbing and Gasfitting

Master License in MA
MA Master Pipefitter / Process Piping
RI Master Pipefitter 2

Training and Certifications

EPA Universal Certification
Wrightsoft Manual J
Wrightsoft Cad Design
Aquatherm Fuse Weld Pipe System Certification
BPI Infiltration and Duct Leakage Professional
Certified Lead-Safe  Renovation Contractor

Lead-safe LOGO

Latest Press Releases

  • October 8, 2021 TJ’s Embarks on New Project – Restoration of the Historic Valentine Whitman House

    Follow the Progress on this Historic Restoration


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Our Latest Blog

Follow Our Progress on the Historic Valentine Whitman House

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