Body heat is continuously lost to our cooler surroundings. When the rate of heat loss is too great we feel what?

In HVAC duct system design, ___________ refers to the amount of straight duct that would generate the same amount of resistance to airflow (i.e., pressure drop) as a fitting, such as an elbow, tee, or transition. HVAC systems typically have both straight sections and various fittings, and while straight ducts have predictable resistance based on length and diameter, fittings can introduce additional friction and turbulence, increasing the pressure drop.

The size of air ducts is dependent upon many factors including:

Which of the following are room heat gain factors?

For good room air distribution where people will primarily be seated, air velocity should be between what?

Electrical systems rely on large power hubs to distribute energy across vast distances. What are these large power hubs called?

Latent heat change refers to changes in what?

In the summer (hot and humid climates) to maintain a comfortable indoor temperature:

In an HVAC system, a certain portion of the return gets expelled into the outside environment and replaced with fresh air. Typically, what percentage of air gets expelled and replaced?

The humidity ratio refers to the: