Energy-efficiency measures and other steps taken to make the White House more eco-friendly have saved taxpayers nearly $1.4 million since 1993, according to an administration report to be released today. The savings, now totaling about $300,000 a year, have been achieved through more efficient lighting, heating, and air conditioning; new insulation; double-paned windows; and energy-saving refrigerators, fax machines, and computer equipment. Also, pesticide use on the White House grounds has been cut back and a new sprinkler system has been installed to conserve water. Pres. Clinton launched an effort to green the White House on Earth Day in 1993.