We are a family-owned & operated heating and cooling business for over 75 years! We provide both residential and light commercial HVAC services. We provide maintenance and repair/service on all makes and models of furnaces, air conditioners, heat pumps, geothermal systems, boilers, and ductless systems. We can handle your commercial roof top unit, exhaust fans, make-up air units, and boilers. We provide high-end metal fabrication for any idea you can imagine. We have an in-shop plasma cutter that allows us to create your dream project: from stainless steel to galvanized metal. Our limitation is your imagination! We install, repair and maintain whole-house generators for your emergency power needs. We have a 100% Money-back Guarantee. We're not happy until you're happy. Hiller's support local charities and our communities surrounding the Hillsboro IL area. Give us a call You'll be glad you did!