At Cencal Mechanical Heating & Air, Inc. HVAC company in Modesto, CA, we install and service UV lights. Homeowners are acutely aware of the risk of viruses and bacteria in their homes and look for ways to remove them. The best way to reduce that risk is through ultraviolet light. It’s the perfect complement to a whole-house air purification system that removes allergens, gases, chemicals, and more.