HVAC should provide which of the following A HVAC should be

HVAC should provide which of the following?

A. HVAC should be a closed-loop system with negative pressurization.

B. HVAC should be an open-loop system with positive pressurization.

C. HVAC should be an open-loop system with negative pressurization.

D. HVAC should be a closed-loop system with positive pressurization.

Solution

Answer D: correct

Closed system is that the air inside a room is filtered and continually reused.Ensure that inside air pulled out,So that no part of the system that is should be a negative pressure.It is safety measure

Answers A,B,C : incorrect because they don\'t contain closed loop with positive pressurization.