Unless you are an engineer looking for a specific program to integrate with your current engineering software (which you can find here), there are many other programs that have different learning curves. I've heard some businesses say they have not adopted design software in their business practice because they hear it is too complicated to use. There are an array of heating and air conditioning computer design programs that you can get directly online or through a download. It can also be essential in estimating medium to large projects.
A properly designed HVAC system will operate efficiently and effectively.
Software programs for designing HVAC is crucial to your business if you are engineering, or installing systems that need to be designed to specifications.