Did you know that between 40 to 70 % of your energy costs are refrigeration if you own a convenience or grocery store? There's a lot of data out there available on the internet. Feel free to look it up. If you spent $200 and and you had a return on investment of 3 months, you stand to "make" $67/month after that. The best investment with the quickest returns are the following:
1. Strip Curtains on Walk-In Doors
They reduce "loss of cold air by 65%"
2. Door Sweeps Properly Installed on Walk-In Doors
A Door sweep on a 3' wide cooler door 1/4" off the floor will cost you $82/mo @ $ .13/KWH
3. Auto Door Closer on Walk-In Doors
A cooler door left open cost will cost you almost 6 cents a minute @ $.13/KWH ($.30/5 min)
4.LED Lights on Reach-In Doors & inside Freezers & Cool
Fluorescent Lights generate heat as well and using up to 70% more electricity
I don't want to glaze your eyes over with technical stuff but there is a way to figure out how much you are spending on "wasted energy".