Daniels Heating & Air Conditioning Inc. a family- owned and operated HVAC company, serves San Bernardino and the surrounding areas including South Pasadena, Rancho Cucamonga, Lake Arrowhead, Loma Linda, Redlands, and Rialto. Established in 1991, they are Trane residential systems specialists, selling, installing, and servicing the brand's gas furnaces, heat pumps, hybrid heaters, boilers, air conditioners, and air exchangers. All their installers and service technicians are thoroughly trained and licensed and respond promptly to all repair and maintenance calls and are available 24/7 for emergency cases. Their sales professionals give free in-home estimates for all new installations and replacements.

Given the poor air quality that is prevalent in the area, Daniels also provides indoor air quality services to monitor and remove  air particulates, pollen, animal dander, mildew, mold, dust, and dust mites. These services include installing whole house purification systems, whole house ventilation systems, humidifiers, dehumidifiers, ultraviolet lighting, and air filter installation and change-outs, and ultraviolet lighting. They also offer ductwork cleaning services and, as part of their routine maintenance services, inspect all heating and cooling equipment for gas leaks, coolant leaks, and improper or blocked ventilation that can result in high carbon monoxide levels.

Daniels, Heating & Air Conditioning, Inc. offers commercial HVAC services to businesses in the area. In addition to installing new and replacement heating, cooling, and air filtration systems designed to stand up to the extensive usage needed in commercial spaces, they offer proactive maintenance plans with inspections, cleaning and service appointments scheduled monthly, quarterly, or seasonally as the business requires.