HVAC = Heating, Ventilation, and Air Conditioning. It is a general term for any large building's temperature controlled air handling system.
ventilation is the degree of something
It is the run-up taken before a throw or jump.
If you are talking about the feeling like you want to throw up, the term is nausea.
Heart block is the term meaning interruption of electrical impulses in the heart's conduction system.
The term "goal throw" has no meaning in soccer. A throw in is taken when the ball completely exits the field across the touch line, and it is a means to restart play. A player of the team that did not touch the ball last will take the throw in.
Homeostasis means equilibrium of a system.
In pre-PCV (Positive Crankcase Ventilation) vehicles, that was a term for the crankcase ventilation pipe.
Lymphoma
The term used for a diagnosed illness attributed to contaminants that can be identified in a building. Often, the contaminants come from the ventilation system.
A cardiologist.
Hodgkin's Disease