HVAC is like construction summer u goin to be workin ur ass off winter u will be home. The best thing to do is get into commercial HVAC. Wendys, Burger King hire hvac techs for year round u have to learn about shake machines, ice machines and coolers. So those are steady jobs. Problem is you have to have all ur own tools and use your own truck. Also installers are more likely to work during the winter if you got a company that does track homes.