Home Our SERVICES Service CONTRACTS Choosing A CONTRACTOR Why CHOOSE US? Brands WE USE Contact Welcome Diamond HVAC is a full-service heating, ventilation and air-conditioning contractor for residential and commercial customers. Our technicians have the training, tools and experience to handle a complete range of heating, air-conditioning and air-quality services... Read More 1 2 3 4 Full Service HVAC Diamond HVAC installs, maintains and repairs residential & commercial: Heating - oil, gas, electric,… Read More Diamond HVAC Advantage Since 1990, Diamond HVAC has provided courteous, on-time HVAC services that improve the… Read More New Jersey Service Areas We provide services throughout North Jersey, including towns like North Bergen, Union City,… Read More Brands we Carry & Service Diamond HVAC has a long standing relationship with all of the top HVAC manufacturers and brands. We know and work with companies who build quality and stand behind their products. Some of those vendors include Lennox, Rheem, Weather King, Trane, Honeywell, Aprilaire, Berko, Suburban Manufacturing, Daikin, Unico Systems, SkyMark, Magic-Pak, Johnson Controls, Ruud, and Hart and Cooley. Read More Help & Tips Check the License HVAC contractors must be licensed in New Jersey and hold a current, valid license. Ask to see… Read More Professional and Trade Memberships Get Competitive Bids Is the HVAC Contractor Insured? Check References Site Search It's Not Magic Reduced Costs with Increased Comfort is feasable for your home or office. Find out about our Comfort Club and get Peace of Mind. Read More Login NJ License 13VH03193900 800-666-7722 or 201-330-7690 Copyright © 2013 Diamond HVAC, Inc. website development by eMediaNation.com