The Most Efficient and Quietest Oil Furnaces Available: Dave Lennox Signature® Collection You need an energy efficient furnace, which is why our Dave Lennox Signature Collection oil furnaces were built with variable speed motors. These motors vary their speed in relation to the amount of heat needed to help you reduce the amount of energy used and decrease operating sounds. Speaking of operating sounds, SilentComfort™ technology is also a key feature in these models, helping your home stay warm, cozy and quiet – unlike some traditional heating systems. Find out more about the Dave Lennox Signature Collection oil furnaces we offer at Langford Cooling in Tampa Bay below. To a system that will work best for your needs, call us at 813-898-9553 or set up an appointment online. Are you searching for a profession to assist with your oil furnace maintenance and repair needs? Langford Cooling in Tampa Bay can take care of it all. Just give us a call at 813-898-9553 or use our online scheduler to make an appointment. * Annual Fuel Utilization Efficiency (AFUE) measures how efficient the appliance is in converting its fuel’s energy into heat over the course of a year.