John 3:1-21. Lenny's Heating & Air Conditioning - Armstrong Dealer, in Reedsburg, Wisconsin, is the areas premier heating and cooling company serving Reedsburg, Baraboo, Mauston, Wisconsin Dells and the surrounding areas since 1994. With over 35 years of experience, we specialize in installation and repair of heating and cooling appliances. For all your heating and cooling needs, contact Lenny's Heating & Air Conditioning - Armstrong Dealer, in Reedsburg.