In a packaged system, all equipment is built into an outdoor unit, usually on a concrete slab or other platform. The "package" that gives it its name provides central air conditioning during the summer and heat in colder months.

Models available use:

• Electricity for resistance heating and cooling
• Gas for heating and electricity for cooling
• Heat pump models using electricity

The efficiency of packaged systems are rated using SEER (for cooling efficiency), AFUE% (for gas heating efficiency) and HSPF (for heat pump efficiency). Ductwork is required to transfer the heated or cooled air throughout the home.

Otto's offers a variety of packaged systems in different sizes and efficiencies.

A Otto's packaged system is a compact solution with comfort you can count on. Heating and cooling functions are built into a self-contained unit that is installed outdoors in one cabinet, saving you lots of indoor living space. Choose models with gas or electric heating and air conditioning—or select heat-pump models for heating and cooling. Cooling efficiency is rated using SEER, gas-heating efficiency is AFUE rated, and heat pump efficiency is HSPF rated.