Air handler installation involves mounting an indoor evaporator coil and blower unit in attic, basement, or utility spaces to distribute cooled or heated air through existing ductwork. Air handlers serve as the indoor component of split-system air conditioning and heat pump systems. Proper installation ensures optimal airflow, condensate drainage, and system efficiency.
Technical Specifications
Residential air handlers range from 1.5 to 5 tons capacity with variable-speed or constant-speed blower motors. Units typically measure 28-36 inches wide, 20-24 inches deep, and 12-20 inches tall depending on capacity. Installation requires supply and return ductwork connections, refrigerant line connections, condensate drain lines sloped 1/8 inch per 12 feet minimum, and 208-240V electrical connections. Proper insulation around ductwork and unit cabinet reduces efficiency losses.
Installation Requirements
Positioning must allow adequate clearance for airflow, maintenance access, and future component replacement. Return air plenums require proper sealing to ACCA standards. Condensate pans need drain protection and UV-resistant drain lines. Vibration isolation pads reduce noise transmission to living spaces.
System Integration
Air handlers connect directly to outdoor condenser units or heat pump units via refrigerant lines. Proper refrigerant charge and airflow verification ensure rated efficiency and capacity delivery.