A Business Built On Integrity, Affordability and Quality. DLS Services heating and air conditioning performs residential service and repair on heating, air conditioning equipment, and water heaters. We work on furnaces, traditional split system A/C units and Mini-split ductless A/C units, hot water boilers and steam boilers, humidifiers, filtration systems for those with allergies, and much more. We provide excellent service at a surprisingly affordable price because we are not a huge company with excessive over-head and bureaucracy. This also allows us to provide prompt attention in a time of need. Customers with maintenance agreements enjoy the added benefit of a 10% discount from the normal overtime rates other companies charge. 20 years of experience. Call for a free estimate.