The tools of your trade and garage equipment are costly to replace but when you do need to repair, upgrade or replace then make sure you look at buying the most energy-efficient options. For example, compressors’ consumer energy at different rates and so consider the best model for your business. Always follow the manufacturer’s recommendations when using which will give your equipment longer life and less maintenance.
If you use a paint booth, you will be pleasantly surprised to see how far things have moved on since you last purchased. They are a lot more energy-efficient and ask your supplier about variable speeds, efficient lighting, and better airflow and ducting. Bay doors are vital in a garage but as you know, these doors which could be open for most of the day, make heating the garage almost impossible. They are of course a major capital outlay but when you do come to buy new, models exist that open and close much quicker which allow for keeping the doors closed when vehicles have been moved inside or outside.
Some areas of the garage will need more lighting than others and so this is an area that you can look at relatively cheaply and easily. Consider moving to CLF or LED illuminated lights that use significantly less energy and offer durability that is ideal for a garage environment.