| HVAC | heating, ventilating, and air conditioning |
|---|---|
| IHCA | individual health care account; isocapnic hyperventilation with cold air |
| IHRA | isocapnic hyperventilation with room air |
| LAF | laminar air flow; Latin American female; leukocyte-activating factor; lymphocyte-activating factor |
| LAFR | laminar air flow room |