Your Neighbors' Preferred HVAC Company in New Philadelphia, Ohio Founded on more than 100 years of combined experience, we’re committed to setting new standards for reliable, superior service. Trust in our family to take care of yours and provide an elite level of service you’ll be proud to call local. At Simpson, we hold ourselves to higher standards. Our HVAC company in New Philadelphia has invested a tremendous amount of money and hours to develop the processes and standards our customers deserve. This includes everything from ongoing training programs to our same-day, 24/7/365 service.