We'll be there right away!" SINCE 1988QUALITY SERVICE Hillestad, one of Madison's most experienced and respected heating and cooling contractors, has earned the trust of thousands of families by helping them keep their homes safe and comfortable year round. 24 Hour Emergency Service call today at 608.231.3888 We Install, service and maintain furnaces air conditioners boilers hot Water Heaters in-floor Heat Air Purifiers Thermostats Ask us about...rated products. CHOOSING THE RIGHT EQUIPMENT. As manufacturers develop new products to keep us comfortable and conserve energy, Hillestad is right there to help you choose the right unit for your home. We not only help you conserve energy, but money as well. Some of our manufactures offer financing with unusually easy terms and a Hillestad representative can explain these terms to you. To learn more about our most popular furnaces and air conditioners, please visit our manufacturers page. PREVENTIVE MAINTENANCE SERVICE Prevent problems as the seasons change with our planned maintenance programs. Ongoing planned maintenance from Hillestad will give you peace of mind year 'round. Combine the Fall and Spring startup plans for a semi-annual maintenance program perfect for your home. Your Hillestad representative will help you create a plan. Not all steps are applicable to all systems.