The popularity of HVAC contractors/companies can change over time, and it can also vary based on specific regions within New Jersey. To find the most popular HVAC contractor/company in New Jersey at the current time, I recommend doing some research online, checking customer reviews and ratings, and seeking recommendations from friends, family, or neighbors who have recently used HVAC services in the area.
You can also consider reaching out to local trade associations or consumer review websites like Yelp, Google Reviews, or Angie's List to get a better understanding of the reputation and quality of services provided by different HVAC contractors in New Jersey. Remember to look for contractors with proper licenses, insurance, and a track record of excellent customer service and satisfaction.