Follow these easy 10 steps for winterizing your Denver home. 1. Clean Gutters, 2. Remove Window Air Conditioners, 3. Disconnect and Clean Evaporative Coolers, 4. Drain Your Sprinkler System, 5. Turn Off Exterior Faucets, 6. Wrap Your Water Heater, 7. Clean Your Furnace, 8. Chimneys, 9. Lower Water Temperatures, and 10. Caulk It.