We mean a Great Deal To Your Business! Dumanski Office Interiors (DOI) is a full-service office furniture dealer and design company. In our 7000 sq ft facility, we represent leading manufacturers such as Herman Miller, Nightingale, Three H Manufacturing. Our Mission is to offer our customers quality office furniture products and office design services. We will first listen to understand our client’s needs then deliver the best products and service that will exceed our client’s expectations with a fair price, honesty, and trust. more... See more text