Our Blower Door testing system helps determine where you have air leaks in your home prior to installing windows and siding. Our specialized system depressurizes your home up to 50 pascals, simulating a 20 mph wind hitting your home from every direction. Our employees are also equipped to offer Home Energy Efficiency Recommendations prior to starting the work on your home to ensure energy efficiency. Kirchner Siding and Window, located in Owatonna, MN, is a leading Southern Minnesota home improvement company specializing in Seamless Steel Siding, Vinyl Siding, Windows and Doors, Soffit & Fascia, Decks, Remodeling, Additions, Porches and Insulation.