David White Services is committed to offering exceptional heating tune-up services to the residents of Lancaster, OH. Fairfield County winters are unforgiving, so getting proper maintenance for your heater is important. Our team can make sure that your heating system is ready to handle the cold winter months. We’ve been serving the area since 1977. Building lasting and trusting relationships with our customers is a top priority for us. We’re proud to be a Lennox Premier Dealer that has won the Circle of Excellence Award. We’ve also been given the Centurion Award for the quality of our work.