A+Derr is a 4th generation family operated company that has been serving the Evansville, Newburgh and Boonville area for nearly forty years! A+Derr has one of the area’s largest and most responsive technician fleets. Need service? Don’t panic! A+Derr is able to provide “Service Today or You Don’t Pay!”. We take pride in taking care of our customers promptly and professionally! When customers choose A+Derr they receive quality products with outstanding customer service. We believe in standing behind our work and back this up with our 100% satisfaction guarantee! If you’re not happy with a product installed by us after the 1st year, we’ll buy it back!