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Illinois Mechanical Service & Design is a company founded on the idea that customer satisfaction is the number one priority. That giving the customer what they deserve is paramount to success. At IMSD the Customer is number 1! Our goal is to maintain 100% Customer Satisfaction. Whether you are a Residential or Commercial customer, our emphasis is on your satisfaction. You deserve Professional, undivided attention to all of your HVAC needs. IMSD services all makes and models for your convenience. We don't only want to be your HVAC contractor, but we want to be your HVAC Partner for the future Illinois Mechanical Service & Design Inc has over 75 years of combined excellence. Residential HVAC Preventative, Replacement and Repair Services for: Furnaces Air Conditioning Units Electronic Air Cleaners Humidifiers Commercial HVAC Contractual Maintenance, Service and Installation: Air Conditioning Kitchen Equipment Beer Coolers Ovens Furnaces Walk-In Coolers Fin Tubes Boilers Rooftop Units Commercial Freezers Ice Machines Humidifiers We offer 24 Hour A Day 365 Days A Year Emergency Services - Because your HVAC does not run during normal business hours. Call our Rapid Response Team for Service Any Time!!