Glossary

I

Infiltration

Airflow into a space usually through walls and leaks around doors and windows. Insulation: Any material that reduces the speed of heat transfer.

Indoor Coil

A refrigerant containing a portion of a fan coil unit similar to a car radiator, typically made of several rows of copper tubing with aluminum fins.

Indoor Unit

Usually located inside the house, it houses the indoor coil, fan, motor and filtering device, sometimes called the air handler.