20 | -10 02-08-1-40 20 40 10 60 50 -50 -20 -40 60 °C 120 80- 60 100 50 Winter winds eat up cold cash 20 30 07 Before the mercury dips, follow these tips to minimize your heating costs: Seal air leaks around windows and doors. Caulk or seal entry points where ductwork, wiring, and plumbing are installed. Add insulation to the foundation and attic. For more energy-saving tips, visit otpco.com/SaveNow. fx OTTER TAIL POWER COMPANY 20 | -10 02-08-1-40 20 40 10 60 50 -50 -20 -40 60 ° C 120 80- 60 100 50 Winter winds eat up cold cash 20 30 07 Before the mercury dips , follow these tips to minimize your heating costs : Seal air leaks around windows and doors . Caulk or seal entry points where ductwork , wiring , and plumbing are installed . Add insulation to the foundation and attic . For more energy - saving tips , visit otpco.com/SaveNow . fx OTTER TAIL POWER COMPANY