Heating, Ventilation, Air Conditioning, Refrigeration Program Overview

  • Request work from Diman's HVAC/R Program

    The Heating, Ventilation, Air Conditioning, and Refrigeration program has been designed to prepare students for immediate employment in the heating, ventilation, air conditioning and refrigeration industries. Upon completion of this program, students possess the necessary knowledge, skills and certifications to diagnose, repair and install today's equipment. Our instructors work to instill 21st Century Skills and social responsibility in all students, and highlight areas of our trade that affect sustainability and environmental impact.  The HVACR shop believes that a diverse workforce will help strengthen the industry of the future, and create a positive learning environment for everyone. 

    The Heating, Ventilation, Air Conditioning, and Refrigeration program is one of the licensed mechanical trades here at Diman, and the only trade where students are immediately able to enter the industry after graduation, without the need for continuing education or night schooling.  Students will earn the Environmental Protection Agency (EPA) 608 Certification which allows work on most air conditioning and refrigeration equipment found in most residential and light commercial properties.  Upon completion of the four-year program at Diman and being eighteen years of age, new technicians should register with the Massachusetts Division of Apprentice Standards (DAS) and for their Refrigeration Apprentice License from the Massachusetts Bureau of Pipefitters, Refrigeration Technicians, and Sprinkler Fitters.  After 2000 hours of on-the-job-training (OJT) and proper registration, technicians will be allowed to test for the Massachusetts Refrigeration Technician license which permits unrestricted large commercial work.  This license is transferable to other states that currently have articulation agreements.


  • Diman Advisory Board Seeks Your Help

    We want you to join the Diman family. While we're proud of our vocational programs and their ability to turn young workers into skilled members of the community, we can't maintain that level of quality without the help of industry professionals. Please consider joining our Vocational Advisory Board, where you will help steer our vocational programs and students toward future success. Learn more and apply here.

    Comments (-1)

Skills & Careers

  • Students graduating from Diman have a variety of job options open to them. Below is a partial list of jobs Diman grads from this program are qualified for, depending on their level of education.

    Diman Diploma Post-Secondary Education 4 Year College Degree
    • HVAC/R Residential Service Technician
    • HVAC/R Residential Installation Technician
    • Ductwork Installer
    • Supply House Salesperson
    • HVAC/R Commercial Apprentice
    • Service and Installation Dispatch
    • Building Analyst
    • Certified Energy Manager
    • Certified Building Operator
    • Assistant Project Manager
    • Weatherization Technician
    • Systems Designer
    • Safety Coordinator
    • Home Inspector
    • Mechanical Engineer
    • Electrical Engineer
    • Facilities Manager
    • Project Manager
    • Construction Management
    • Business Management

    Knowledge & Skill Areas

    Grade 9 

    • Occupational Safety
    • Hand and Power Tools
    • Pipe Joining/Fitting
    • Construction Drawings
    • Electrical Fundamentals
    • HVACR Electrical Controls
    • Mini Split Heat Pump Install

    Grade 10 

    • Refrigerant Handling
    • Refrigeration Theory
    • Medium Temp Systems
    • Low Temp Systems
    • Refrigeration Controls
    • HVACR System Testing
    • System Pump-Down

    Grade 11

    • Forced Air Heating Systems
    • Central Air Conditioning 
    • Installation and Service
    • Preventative Maintenance 
    • Refrigerant Recovery
    • Duct System Design
    • Efficiency Testing

     Grade 12

    • Hydronic Heating Systems
    • Wall Hung Boilers/Combi Systems
    • Centrifugal Pumps
    • Oil Burners
    • Combustion Analysis
    • Unitary Heat Pumps
    • Live In-District Work

In the News

  •  Students bending pipe

    Diman gets grant to buy 10 new heat pumps: How HVAC students are training for the future.

    A dozen students were busily bending copper tubing, working together as they measured and mounted it to a wall, each one contributing in their own small way to a cleaner climate.  (3/7/24)

    Comments (-1)
  •  Students posing at RST opening

    HVACR students invited to business opening

    The HVACR department would like to thank RST Thermal for inviting the program to their grand opening at 52 Ferry Street.  In attendance were Mayor Paul Coogan, President Evan Trethewey, Vice President & ”This Old House’s” Richard Trethewey and multiple brand representatives. (6/2/23)

    Comments (-1)
  • PHCC All-Star Announced

    Congratulations to Ethan Ste. Marie (HVAC) for receiving the All Star award from the Plumbing, Heating and Cooling Contractors Association (PHCC) at their annual trade show.  Ethan's hard work, professionalism and dedication helped him earn this title, which includes a $500 scholarship and a tool bag filled with industry tools donated by Ferguson. (5/2/23)

    Comments (-1)
  • Liberty Utilities training for HVACR students

    The HVACR department would like to thank Liberty Utilities for inviting our grade 10 students to attend the DigSafe MUST Managing Underground Safety Training seminar at White’s of Westport on Wednesday 3/1/23.  Our students learned about digging safety and to always call 811 to have DigSafe mark underground utilities safely. It’s the Law! (3/2/23)

    Comments (-1)
  • HVACR thanks ENE Systems

    The HVACR department would like to thank Mike Papetti from ENE Systems, Inc. for speaking to all of our students about career opportunities in the controls field!  ENE Systems, Inc. is the largest independent HVAC Controls contractor in New England, and Papetti was able to share information about facilities management, tips to enter the industry and demonstrations of live viewing of real life control systems. (3/2/23)

    Comments (-1)
  •   Culinary arts students

    Diman students in demand

    Looking for a job? You’re in luck, with experts saying that the current job market offers historic levels of open positions across a wide swath of industries. “It’s the first time when the leverage is really in employees’ hands,” said Kevin Lazaro, Director of Cooperative Education at Diman Regional Vocational Technical High School. “I’ve seen a lot of changes, but I’ve never seen such a boon of job opportunities across a multitude of industries.” (6/15/22)

    Comments (-1)