The answer to 'should I get installation or' is that it depends on your specific situation and needs. In general, professional HVAC installation is recommended for most homeowners, as it ensures the system is properly sized, installed, and configured for optimal performance and energy efficiency. Professional installation also comes with a warranty and ongoing support from the installer.
However, in some cases, a homeowner with some DIY experience may be able to handle a simple HVAC replacement or upgrade themselves. This can save money, but requires careful planning, the right tools and skills, and attention to safety. It's important to carefully weigh the benefits and risks before deciding whether to do it yourself or hire a professional HVAC technician.