It’s a great result for all industries. If you’re over 20 years old in this industry it is expected that you earn about $30k per year. You are going to want to consider typicals. That means you could get caught in between each of this. The growth rate for averages is increasing at an alarming pace. However, the growth rate of other fields isn’t nearly the same. HVAC is growing at a rate that is higher than 5%. This industry is projected to increase by 13%.. y6juod3u8n.