Energy Star Transformers

The federal Energy Star

^® program is promoting the use of

energy-efficient, low-voltage transformers in new construction and renovations. Low-voltage transformers, which convert the electricity supplied by a utility or larger transformer to the voltage needed by lights, appliances, and equipment, continuously drain energy, even when equipment is shut off (see EBN

Vol. 9, No. 7/8). Therefore, even small improvements in transformer efficiency can yield significant energy savings. Energy Star transformers generally pay back their initial added cost within two to four years. You can compare transformer payback rates and savings with an online calculator at

www.transcalcny.com. For a list of Energy Star-labeled transformers, visit

www.energystar.gov. Click on “products” and then “transformers.”