I have a question about starting a business. I took an HVAC at a vocational school for one year back in 2011. Then shortly after I received and A.S. in electronics engineering and also took an Electrician course. I've been in the HVAC controls field for 4 years now. Am I eligible to take an Journeyman License Test? Does DDC count towards HVAC licensing? Also I want to start my own business just doing residential service work and maintenance. No installation, what Licensing is required? I'm in VA.