The Most Efficient and Quietest Oil Furnaces Available: Dave Lennox Signature® Collection We know you want an energy efficient furnace, which is why our Dave Lennox Signature Collection oil furnaces were constructed with variable speed motors. These motors vary their speed in relation to the amount of heat needed which helps you conserve energy and decrease operating sounds. Now that we’re talking about operating sounds, SilentComfort™ technology is another key feature in these products, keeping your home warm, cozy and quiet – unlike some typical heating systems. Find out more about the Dave Lennox Signature Collection oil furnaces we offer at Select Comfort System Heating & Air Conditioning in West Valley below. To a system that will work best for your needs, call us at 801-969-7088 or schedule an appointment online. Looking for someone to help with your oil furnace maintenance and repair needs? Select Comfort System Heating & Air Conditioning in West Valley can take care of it all. Just give us a call at 801-969-7088 or use our online scheduler to set up 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.